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Istanbul Weather Records (TU000017062)

Record envelope, standing records and threshold days for Istanbul (TU000017062), Turkey, with 79 years of record.

Key Facts for Istanbul

  • Istanbul (TU000017062) is a weather station in Turkey at 40.97 latitude and 29.08 longitude, 33 m (108 ft) above sea level.
  • The station reports from 1929 to 2007, 79 years of record.
  • 1,464 records set at Istanbul still stand.
  • Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
  • Istanbul set a daily record high maximum temperature of 28.6 C (83.5 F) on 7 May 2007.

About the Station

  • Location: Turkey, 40.97 latitude, 29.08 longitude.
  • Elevation: 33 m (108 ft).
  • Period of record: 1929 to 2007, 79 years.
  • Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Istanbul, with 2026 drawn through them The band shows the record high and record low for each calendar day at Istanbul. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Istanbul. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Istanbul, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan21.7 C (71.1 F)-9.7 C (14.5 F)n/an/a
Feb24.0 C (75.2 F)-8.2 C (17.2 F)n/an/a
Mar26.8 C (80.2 F)-7.0 C (19.4 F)n/an/a
Apr32.9 C (91.2 F)-2.0 C (28.4 F)n/an/a
May34.1 C (93.4 F)2.8 C (37.0 F)n/an/a
Jun39.2 C (102.6 F)7.1 C (44.8 F)n/an/a
Jul39.7 C (103.5 F)10.5 C (50.9 F)n/an/a
Aug40.5 C (104.9 F)10.2 C (50.4 F)n/an/a
Sep37.5 C (99.5 F)6.0 C (42.8 F)n/an/a
Oct34.2 C (93.6 F)2.2 C (36.0 F)n/an/a
Nov27.2 C (81.0 F)-7.2 C (19.0 F)n/an/a
Dec21.5 C (70.7 F)-8.4 C (16.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Istanbul by the year they were set 1,464 records at Istanbul still stand. 1932 holds the most, with 43. 02040601929: 381930: 91931: 221932: 431933: 301934: 221935: 161936: 211937: 211938: 71939: 71940: 201941: 361942: 351943: 151944: 131945: 221946: 141947: 221948: 321949: 231950: 241951: 151952: 251953: 201954: 141955: 181956: 211957: 201958: 261959: 231960: 251961: 151962: 161963: 211964: 191965: 151966: 161967: 91968: 121969: 281970: 211971: 191972: 121973: 141974: 141975: 111976: 191977: 261978: 161979: 181980: 131981: 131982: 151983: 101984: 251985: 251986: 51987: 371988: 81989: 161990: 201991: 201992: 111993: 111994: 311995: 201996: 81997: 161998: 191999: 192000: 262001: 342002: 212003: 152004: 42007: 21929193719451953196119691977198519932001
1,464 records at Istanbul still stand. 1932 holds the most, with 43.
Standing records at Istanbul by the year they were set
Year setStanding records
192938
19309
193122
193243
193330
193422
193516
193621
193721
19387
19397
194020
194136
194235
194315
194413
194522
194614
194722
194832
194923
195024
195115
195225
195320
195414
195518
195621
195720
195826
195923
196025
196115
196216
196321
196419
196515
196616
19679
196812
196928
197021
197119
197212
197314
197414
197511
197619
197726
197816
197918
198013
198113
198215
198310
198425
198525
19865
198737
19888
198916
199020
199120
199211
199311
199431
199520
19968
199716
199819
199919
200026
200134
200221
200315
20044
20072

All-Time Record Progression

1 new records
When Istanbul set new all-time records 1 all-time records were set at Istanbul between 11 August 1970 and 11 August 1970. Each dot is a new record. Record high maximum temperature11 August 1970: Record high maximum temperature 40.5 C (104.9 F)1970
1 all-time records were set at Istanbul between 11 August 1970 and 11 August 1970. Each dot is a new record.
When Istanbul set new all-time records
DateKindDetail
1970-08-11Record high maximum temperatureRecord high maximum temperature 40.5 C (104.9 F)

Wettest Day of Each Month

Nov: 88.0 mm (3.5 in)
Record daily precipitation for each month at Istanbul The wettest day on record for each calendar month at Istanbul. The most was 88.0 mm (3.5 in) on 4 November 1962. 0255075100 Jan: 54.0 mm (2.1 in), 21 January 1983 Jan Feb: 73.0 mm (2.9 in), 1 February 1934 Feb Mar: 52.0 mm (2.0 in), 19 March 1958 Mar Apr: 50.0 mm (2.0 in), 20 April 1978 Apr May: 56.0 mm (2.2 in), 12 May 1974 May Jun: 45.0 mm (1.8 in), 11 June 1932 Jun Jul: 68.0 mm (2.7 in), 10 July 1995 Jul Aug: 72.0 mm (2.8 in), 15 August 1974 Aug Sep: 80.0 mm (3.1 in), 10 September 1981 Sep Oct: 81.0 mm (3.2 in), 30 October 1978 Oct Nov: 88.0 mm (3.5 in), 4 November 1962 Nov Dec: 68.0 mm (2.7 in), 7 December 1963 Dec
The wettest day on record for each calendar month at Istanbul. The most was 88.0 mm (3.5 in) on 4 November 1962.
Record daily precipitation for each month at Istanbul
MonthRecord daily precipitation (mm)Date
Jan54.0 mm (2.1 in)21 January 1983
Feb73.0 mm (2.9 in)1 February 1934
Mar52.0 mm (2.0 in)19 March 1958
Apr50.0 mm (2.0 in)20 April 1978
May56.0 mm (2.2 in)12 May 1974
Jun45.0 mm (1.8 in)11 June 1932
Jul68.0 mm (2.7 in)10 July 1995
Aug72.0 mm (2.8 in)15 August 1974
Sep80.0 mm (3.1 in)10 September 1981
Oct81.0 mm (3.2 in)30 October 1978
Nov88.0 mm (3.5 in)4 November 1962
Dec68.0 mm (2.7 in)7 December 1963

Period of Record Coverage

1929 to 2007
Days with data per year at Istanbul 77 years of record at Istanbul, 1929 to 2007. 2 years have data for under 90 percent of days and are left out of rankings: 2004, 2007. 1929: 365 of 365 days1930: 365 of 365 days1931: 365 of 365 days1932: 366 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 365 of 365 days1936: 366 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 31 of 366 days2007: 16 of 365 days19301940195019601970198019902000
77 years of record at Istanbul, 1929 to 2007. 2 years have data for under 90 percent of days and are left out of rankings: 2004, 2007.
Days with data per year at Istanbul
YearDays with dataShare of yearComplete
1929365100%Yes
1930365100%Yes
1931365100%Yes
1932366100%Yes
1933365100%Yes
1934365100%Yes
1935365100%Yes
1936366100%Yes
1937365100%Yes
1938365100%Yes
1939365100%Yes
1940366100%Yes
1941365100%Yes
1942365100%Yes
1943365100%Yes
1944366100%Yes
1945365100%Yes
1946365100%Yes
1947365100%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004318%No
2007164%No

Latest Records

20
Latest records at Istanbul
DateStationRecordValueBeat old record byOld record stoodSignificance
7 May 2007Istanbul, TRdaily high max28.6 C (83.5 F)1.1 C (2.0 F)74 years31 of 100 (Routine)
6 May 2007Istanbul, TRdaily high max30.1 C (86.2 F)2.3 C (4.1 F)10 years15 of 100 (Routine)
23 January 2004Istanbul, TRdaily low max-2.5 C (27.5 F)0.3 C (0.5 F)61 years25 of 100 (Routine)
8 January 2004Istanbul, TRdaily low max0.2 C (32.4 F)0.7 C (1.3 F)21 years14 of 100 (Routine)
7 January 2004Istanbul, TRdaily low max-1.0 C (30.2 F)0.4 C (0.7 F)56 years24 of 100 (Routine)
7 January 2004Istanbul, TRdaily low min-4.2 C (24.4 F)0.2 C (0.4 F)56 years24 of 100 (Routine)
3 November 2003Istanbul, TRmonthly high max27.2 C (81.0 F)0.8 C (1.4 F)71 years39 of 100 (Notable)
30 October 2003Istanbul, TRdaily low min4.0 C (39.2 F)0.1 C (0.2 F)37 years18 of 100 (Routine)
23 October 2003Istanbul, TRmonthly high min (Tie)20.4 C (68.7 F)tie40 years7 of 100 (Routine)
22 October 2003Istanbul, TRdaily high max (Tie)26.2 C (79.2 F)tie70 years7 of 100 (Routine)
6 September 2003Istanbul, TRdaily low min (Tie)11.8 C (53.2 F)tie56 years5 of 100 (Routine)
1 September 2003Istanbul, TRdaily high min21.6 C (70.9 F)0.3 C (0.5 F)45 years21 of 100 (Routine)
28 August 2003Istanbul, TRdaily high min23.8 C (74.8 F)1.3 C (2.3 F)73 years34 of 100 (Routine)
27 August 2003Istanbul, TRdaily high max35.7 C (96.3 F)2.5 C (4.5 F)33 years26 of 100 (Routine)
27 August 2003Istanbul, TRdaily high min22.6 C (72.7 F)0.2 C (0.4 F)9 years9 of 100 (Routine)
26 August 2003Istanbul, TRdaily high max34.2 C (93.6 F)1.7 C (3.1 F)8 years15 of 100 (Routine)
16 August 2003Istanbul, TRdaily high max34.1 C (93.4 F)0.4 C (0.7 F)45 years21 of 100 (Routine)
5 July 2003Istanbul, TRdaily high max36.4 C (97.5 F)1.4 C (2.5 F)58 years29 of 100 (Routine)
4 July 2003Istanbul, TRdaily high min22.0 C (71.6 F)0.2 C (0.4 F)14 years11 of 100 (Routine)
4 July 2003Istanbul, TRdaily high max (Tie)33.0 C (91.4 F)tie64 years6 of 100 (Routine)

Climate Trend

75 complete years, 1929 to 2003
Annual mean temperature at Istanbul as warming stripes, 1929 to 2003 One stripe for each of 75 complete years at Istanbul, 1929 to 2003. Blue stripes are years cooler than the station's own mean of 14.4 C (57.9 F); red stripes are warmer. The coolest year was 1942, at 13.0 C (55.5 F), and the warmest was 2001, at 15.8 C (60.5 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1929: 13.8 C, -0.6 C from the station mean1930: 14.7 C, +0.3 C from the station mean1931: 14.3 C, -0.1 C from the station mean1932: 15.0 C, +0.6 C from the station mean1933: 13.5 C, -0.9 C from the station mean1934: 14.8 C, +0.4 C from the station mean1935: 14.3 C, -0.2 C from the station mean1936: 14.8 C, +0.4 C from the station mean1937: 15.1 C, +0.7 C from the station mean1938: 14.3 C, -0.1 C from the station mean1939: 14.7 C, +0.3 C from the station mean1940: 13.5 C, -0.9 C from the station mean1941: 13.7 C, -0.7 C from the station mean1942: 13.0 C, -1.4 C from the station mean1943: 13.5 C, -0.9 C from the station mean1944: 14.3 C, -0.1 C from the station mean1945: 14.0 C, -0.4 C from the station mean1946: 14.9 C, +0.5 C from the station mean1947: 14.5 C, +0.1 C from the station mean1948: 13.5 C, -0.9 C from the station mean1949: 13.2 C, -1.2 C from the station mean1950: 14.4 C, 0.0 C from the station mean1951: 14.7 C, +0.3 C from the station mean1952: 14.9 C, +0.5 C from the station mean1953: 13.5 C, -0.9 C from the station mean1954: 14.2 C, -0.2 C from the station mean1955: 14.9 C, +0.5 C from the station mean1956: 13.5 C, -0.9 C from the station mean1957: 14.4 C, 0.0 C from the station mean1958: 14.7 C, +0.3 C from the station mean1959: 13.3 C, -1.1 C from the station mean1960: 14.7 C, +0.2 C from the station mean1961: 14.6 C, +0.2 C from the station mean1962: 14.9 C, +0.5 C from the station mean1963: 14.5 C, +0.1 C from the station mean1964: 13.7 C, -0.7 C from the station mean1965: 13.9 C, -0.5 C from the station mean1966: 15.7 C, +1.3 C from the station mean1967: 14.2 C, -0.2 C from the station mean1968: 14.4 C, 0.0 C from the station mean1969: 14.4 C, -0.1 C from the station mean1970: 14.9 C, +0.5 C from the station mean1971: 14.5 C, +0.1 C from the station mean1972: 14.3 C, -0.1 C from the station mean1973: 14.1 C, -0.3 C from the station mean1974: 14.2 C, -0.2 C from the station mean1975: 14.7 C, +0.3 C from the station mean1976: 13.7 C, -0.7 C from the station mean1977: 14.6 C, +0.2 C from the station mean1978: 14.5 C, 0.0 C from the station mean1979: 15.1 C, +0.6 C from the station mean1980: 14.2 C, -0.2 C from the station mean1981: 14.6 C, +0.2 C from the station mean1982: 14.2 C, -0.2 C from the station mean1983: 14.4 C, 0.0 C from the station mean1984: 14.7 C, +0.3 C from the station mean1985: 13.9 C, -0.5 C from the station mean1986: 14.6 C, +0.2 C from the station mean1987: 13.9 C, -0.5 C from the station mean1988: 14.4 C, 0.0 C from the station mean1989: 14.7 C, +0.3 C from the station mean1990: 14.9 C, +0.5 C from the station mean1991: 13.9 C, -0.5 C from the station mean1992: 14.0 C, -0.4 C from the station mean1993: 14.1 C, -0.3 C from the station mean1994: 15.7 C, +1.3 C from the station mean1995: 14.9 C, +0.5 C from the station mean1996: 14.4 C, 0.0 C from the station mean1997: 13.8 C, -0.6 C from the station mean1998: 15.1 C, +0.7 C from the station mean1999: 15.7 C, +1.3 C from the station mean2000: 15.2 C, +0.8 C from the station mean2001: 15.8 C, +1.4 C from the station mean2002: 15.4 C, +1.0 C from the station mean2003: 14.6 C, +0.2 C from the station mean19291940195019601970198019902000
One stripe for each of 75 complete years at Istanbul, 1929 to 2003. Blue stripes are years cooler than the station's own mean of 14.4 C (57.9 F); red stripes are warmer. The coolest year was 1942, at 13.0 C (55.5 F), and the warmest was 2001, at 15.8 C (60.5 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Istanbul as warming stripes, 1929 to 2003
YearAnnual mean temperatureDifference from the station mean
192913.8 C-0.65 C
193014.7 C+0.32 C
193114.3 C-0.13 C
193215.0 C+0.60 C
193313.5 C-0.95 C
193414.8 C+0.36 C
193514.3 C-0.16 C
193614.8 C+0.38 C
193715.1 C+0.66 C
193814.3 C-0.15 C
193914.7 C+0.26 C
194013.5 C-0.89 C
194113.7 C-0.71 C
194213.0 C-1.37 C
194313.5 C-0.95 C
194414.3 C-0.12 C
194514.0 C-0.43 C
194614.9 C+0.50 C
194714.5 C+0.12 C
194813.5 C-0.93 C
194913.2 C-1.18 C
195014.4 C+0.00 C
195114.7 C+0.30 C
195214.9 C+0.49 C
195313.5 C-0.92 C
195414.2 C-0.24 C
195514.9 C+0.51 C
195613.5 C-0.91 C
195714.4 C+0.03 C
195814.7 C+0.25 C
195913.3 C-1.09 C
196014.7 C+0.24 C
196114.6 C+0.20 C
196214.9 C+0.53 C
196314.5 C+0.11 C
196413.7 C-0.75 C
196513.9 C-0.47 C
196615.7 C+1.28 C
196714.2 C-0.19 C
196814.4 C+0.00 C
196914.4 C-0.06 C
197014.9 C+0.52 C
197114.5 C+0.08 C
197214.3 C-0.08 C
197314.1 C-0.29 C
197414.2 C-0.17 C
197514.7 C+0.30 C
197613.7 C-0.71 C
197714.6 C+0.23 C
197814.5 C+0.04 C
197915.1 C+0.64 C
198014.2 C-0.22 C
198114.6 C+0.16 C
198214.2 C-0.18 C
198314.4 C-0.02 C
198414.7 C+0.26 C
198513.9 C-0.52 C
198614.6 C+0.15 C
198713.9 C-0.50 C
198814.4 C-0.01 C
198914.7 C+0.25 C
199014.9 C+0.46 C
199113.9 C-0.48 C
199214.0 C-0.38 C
199314.1 C-0.29 C
199415.7 C+1.26 C
199514.9 C+0.52 C
199614.4 C-0.03 C
199713.8 C-0.57 C
199815.1 C+0.72 C
199915.7 C+1.32 C
200015.2 C+0.77 C
200115.8 C+1.41 C
200215.4 C+0.98 C
200314.6 C+0.19 C

The annual mean temperature here has risen by 0.09 C (0.03 to 0.15) per decade over 1929 to 2003. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 75 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Istanbul
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.09 C (0.03 to 0.15) per decade0.2 F (0.1 to 0.3) per decade1929 to 200375Rise
Mean daily maximum0.00 C (-0.07 to 0.06) per decade-0.01 F (-0.13 to 0.11) per decade1929 to 200375Not clearly different from zero
Mean daily minimum0.2 C (0.1 to 0.3) per decade0.3 F (0.2 to 0.5) per decade1929 to 200375Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1929 to 2007
Yearly extremes at Istanbul: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.5 C (104.9 F)197034.6 C (94.3 F)77
Coldest night (TNn)-9.7 C (14.5 F)1954-4.5 C (23.9 F)77
Wettest day (Rx1day)88.0 mm (3.5 in)196246.0 mm (1.8 in)77
Wettest five days (Rx5day)162.0 mm (6.4 in)193864.0 mm (2.5 in)77
Longest dry spell (CDD)6 days20072 days77

Hottest day (TXx)

Hottest day (TXx) at Istanbul by year The hottest day of the year at Istanbul, 1929 to 2007. The record is 40.5 C (104.9 F) in 1970, marked on the chart; the median year is 34.6 C (94.3 F). 10203040501940196019802000Record: 40.5 C (104.9 F) in 1970
The hottest day of the year at Istanbul, 1929 to 2007. The record is 40.5 C (104.9 F) in 1970, marked on the chart; the median year is 34.6 C (94.3 F).
Hottest day (TXx) at Istanbul by year
YearHottest day (TXx)
192933.3 C (91.9 F)
193034.4 C (93.9 F)
193136.9 C (98.4 F)
193235.6 C (96.1 F)
193333.1 C (91.6 F)
193436.4 C (97.5 F)
193534.5 C (94.1 F)
193633.1 C (91.6 F)
193734.8 C (94.6 F)
193837.5 C (99.5 F)
193933.8 C (92.8 F)
194035.1 C (95.2 F)
194134.4 C (93.9 F)
194236.6 C (97.9 F)
194332.4 C (90.3 F)
194435.4 C (95.7 F)
194539.4 C (102.9 F)
194636.8 C (98.2 F)
194732.8 C (91.0 F)
194834.6 C (94.3 F)
194933.8 C (92.8 F)
195036.5 C (97.7 F)
195134.0 C (93.2 F)
195236.0 C (96.8 F)
195332.1 C (89.8 F)
195435.6 C (96.1 F)
195535.2 C (95.4 F)
195634.6 C (94.3 F)
195736.0 C (96.8 F)
195837.2 C (99.0 F)
195934.7 C (94.5 F)
196031.8 C (89.2 F)
196134.0 C (93.2 F)
196234.2 C (93.6 F)
196334.4 C (93.9 F)
196433.5 C (92.3 F)
196533.7 C (92.7 F)
196638.3 C (100.9 F)
196734.4 C (93.9 F)
196835.7 C (96.3 F)
196936.3 C (97.3 F)
197040.5 C (104.9 F)
197132.5 C (90.5 F)
197236.8 C (98.2 F)
197337.3 C (99.1 F)
197436.3 C (97.3 F)
197533.5 C (92.3 F)
197633.3 C (91.9 F)
197737.5 C (99.5 F)
197836.3 C (97.3 F)
197935.4 C (95.7 F)
198035.7 C (96.3 F)
198133.1 C (91.6 F)
198239.2 C (102.6 F)
198333.1 C (91.6 F)
198439.2 C (102.6 F)
198537.0 C (98.6 F)
198633.2 C (91.8 F)
198735.8 C (96.4 F)
198833.3 C (91.9 F)
198933.8 C (92.8 F)
199032.2 C (90.0 F)
199134.0 C (93.2 F)
199234.6 C (94.3 F)
199333.6 C (92.5 F)
199435.0 C (95.0 F)
199533.6 C (92.5 F)
199633.0 C (91.4 F)
199735.2 C (95.4 F)
199834.6 C (94.3 F)
199934.2 C (93.6 F)
200039.7 C (103.5 F)
200134.2 C (93.6 F)
200238.8 C (101.8 F)
200336.4 C (97.5 F)
200414.9 C (58.8 F)
200730.1 C (86.2 F)

Coldest night (TNn)

Coldest night (TNn) at Istanbul by year The coldest night of the year at Istanbul, 1929 to 2007. The record is -9.7 C (14.5 F) in 1954, marked on the chart; the median year is -4.5 C (23.9 F). -10-505101940196019802000Record: -9.7 C (14.5 F) in 1954
The coldest night of the year at Istanbul, 1929 to 2007. The record is -9.7 C (14.5 F) in 1954, marked on the chart; the median year is -4.5 C (23.9 F).
Coldest night (TNn) at Istanbul by year
YearColdest night (TNn)
1929-8.2 C (17.2 F)
1930-2.7 C (27.1 F)
1931-3.0 C (26.6 F)
1932-7.6 C (18.3 F)
1933-8.4 C (16.9 F)
1934-5.4 C (22.3 F)
1935-3.4 C (25.9 F)
1936-8.0 C (17.6 F)
1937-7.1 C (19.2 F)
1938-4.0 C (24.8 F)
1939-3.2 C (26.2 F)
1940-6.0 C (21.2 F)
1941-8.2 C (17.2 F)
1942-9.4 C (15.1 F)
1943-7.4 C (18.7 F)
1944-4.0 C (24.8 F)
1945-4.0 C (24.8 F)
1946-6.6 C (20.1 F)
1947-8.0 C (17.6 F)
1948-7.2 C (19.0 F)
1949-6.0 C (21.2 F)
1950-9.3 C (15.3 F)
1951-4.5 C (23.9 F)
1952-3.2 C (26.2 F)
1953-7.0 C (19.4 F)
1954-9.7 C (14.5 F)
1955-0.9 C (30.4 F)
1956-8.5 C (16.7 F)
1957-4.5 C (23.9 F)
1958-4.0 C (24.8 F)
1959-2.4 C (27.7 F)
1960-7.6 C (18.3 F)
1961-8.7 C (16.3 F)
1962-2.2 C (28.0 F)
1963-8.2 C (17.2 F)
1964-7.3 C (18.9 F)
1965-5.1 C (22.8 F)
1966-2.4 C (27.7 F)
1967-8.3 C (17.1 F)
1968-8.4 C (16.9 F)
1969-9.6 C (14.7 F)
1970-2.4 C (27.7 F)
1971-4.8 C (23.4 F)
1972-5.7 C (21.7 F)
1973-5.8 C (21.6 F)
1974-3.6 C (25.5 F)
1975-3.2 C (26.2 F)
1976-6.3 C (20.7 F)
1977-2.8 C (27.0 F)
1978-1.9 C (28.6 F)
1979-7.9 C (17.8 F)
1980-4.8 C (23.4 F)
1981-2.8 C (27.0 F)
1982-5.4 C (22.3 F)
1983-6.7 C (19.9 F)
1984-1.6 C (29.1 F)
1985-8.0 C (17.6 F)
1986-2.7 C (27.1 F)
1987-6.9 C (19.6 F)
1988-4.0 C (24.8 F)
1989-2.8 C (27.0 F)
1990-1.3 C (29.7 F)
1991-4.5 C (23.9 F)
1992-4.1 C (24.6 F)
1993-3.2 C (26.2 F)
1994-1.2 C (29.8 F)
1995-1.5 C (29.3 F)
1996-1.6 C (29.1 F)
1997-4.2 C (24.4 F)
1998-0.8 C (30.6 F)
1999-1.2 C (29.8 F)
2000-5.2 C (22.6 F)
2001-2.0 C (28.4 F)
2002-3.2 C (26.2 F)
2003-3.5 C (25.7 F)
2004-6.4 C (20.5 F)
20076.0 C (42.8 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Istanbul by year The wettest day of the year at Istanbul, 1929 to 2007. The record is 88.0 mm (3.5 in) in 1962, marked on the chart; the median year is 46.0 mm (1.8 in). 02550751001940196019802000Record: 88.0 mm (3.5 in) in 1962
The wettest day of the year at Istanbul, 1929 to 2007. The record is 88.0 mm (3.5 in) in 1962, marked on the chart; the median year is 46.0 mm (1.8 in).
Wettest day (Rx1day) at Istanbul by year
YearWettest day (Rx1day)
192931.0 mm (1.2 in)
193055.0 mm (2.2 in)
193148.0 mm (1.9 in)
193245.0 mm (1.8 in)
193346.0 mm (1.8 in)
193473.0 mm (2.9 in)
193539.0 mm (1.5 in)
193648.0 mm (1.9 in)
193742.0 mm (1.7 in)
193868.0 mm (2.7 in)
193952.0 mm (2.0 in)
194047.0 mm (1.9 in)
194148.0 mm (1.9 in)
194249.0 mm (1.9 in)
194354.0 mm (2.1 in)
194425.0 mm (1.0 in)
194543.0 mm (1.7 in)
194637.0 mm (1.5 in)
194746.0 mm (1.8 in)
194858.0 mm (2.3 in)
194972.0 mm (2.8 in)
195028.0 mm (1.1 in)
195166.0 mm (2.6 in)
195236.0 mm (1.4 in)
195358.0 mm (2.3 in)
195434.0 mm (1.3 in)
195576.0 mm (3.0 in)
195629.0 mm (1.1 in)
195734.0 mm (1.3 in)
195852.0 mm (2.0 in)
195961.0 mm (2.4 in)
196036.0 mm (1.4 in)
196148.0 mm (1.9 in)
196288.0 mm (3.5 in)
196368.0 mm (2.7 in)
196449.0 mm (1.9 in)
196555.0 mm (2.2 in)
196645.0 mm (1.8 in)
196721.0 mm (0.8 in)
196866.0 mm (2.6 in)
196927.0 mm (1.1 in)
197041.0 mm (1.6 in)
197145.0 mm (1.8 in)
197238.0 mm (1.5 in)
197342.0 mm (1.7 in)
197472.0 mm (2.8 in)
197529.0 mm (1.1 in)
197643.0 mm (1.7 in)
197736.0 mm (1.4 in)
197881.0 mm (3.2 in)
197943.0 mm (1.7 in)
198052.0 mm (2.0 in)
198180.0 mm (3.1 in)
198234.0 mm (1.3 in)
198354.0 mm (2.1 in)
198430.0 mm (1.2 in)
198565.0 mm (2.6 in)
198636.0 mm (1.4 in)
198759.0 mm (2.3 in)
198859.0 mm (2.3 in)
198951.0 mm (2.0 in)
199035.0 mm (1.4 in)
199145.0 mm (1.8 in)
199237.0 mm (1.5 in)
199353.0 mm (2.1 in)
199432.0 mm (1.3 in)
199568.0 mm (2.7 in)
199634.0 mm (1.3 in)
199776.0 mm (3.0 in)
199860.0 mm (2.4 in)
199942.0 mm (1.7 in)
200038.0 mm (1.5 in)
200133.0 mm (1.3 in)
200262.0 mm (2.4 in)
200332.0 mm (1.3 in)
200449.0 mm (1.9 in)
20070.5 mm (0.02 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Istanbul by year The wettest five days of the year at Istanbul, 1929 to 2007. The record is 162.0 mm (6.4 in) in 1938, marked on the chart; the median year is 64.0 mm (2.5 in). 0501001502001940196019802000Record: 162.0 mm (6.4 in) in 1938
The wettest five days of the year at Istanbul, 1929 to 2007. The record is 162.0 mm (6.4 in) in 1938, marked on the chart; the median year is 64.0 mm (2.5 in).
Wettest five days (Rx5day) at Istanbul by year
YearWettest five days (Rx5day)
192973.0 mm (2.9 in)
193020.0 mm (0.8 in)
193136.0 mm (1.4 in)
193272.0 mm (2.8 in)
1933109.0 mm (4.3 in)
193482.0 mm (3.2 in)
193558.0 mm (2.3 in)
1936100.0 mm (3.9 in)
193797.0 mm (3.8 in)
1938162.0 mm (6.4 in)
1939110.0 mm (4.3 in)
1940112.0 mm (4.4 in)
194152.0 mm (2.0 in)
194286.0 mm (3.4 in)
194364.0 mm (2.5 in)
194460.0 mm (2.4 in)
194552.0 mm (2.0 in)
194627.0 mm (1.1 in)
194745.0 mm (1.8 in)
194874.0 mm (2.9 in)
194999.0 mm (3.9 in)
195056.0 mm (2.2 in)
195186.0 mm (3.4 in)
195268.0 mm (2.7 in)
195371.0 mm (2.8 in)
195454.0 mm (2.1 in)
1955134.0 mm (5.3 in)
195662.0 mm (2.4 in)
195791.0 mm (3.6 in)
195899.0 mm (3.9 in)
195952.0 mm (2.0 in)
196041.0 mm (1.6 in)
196139.0 mm (1.5 in)
196274.0 mm (2.9 in)
1963109.0 mm (4.3 in)
1964104.0 mm (4.1 in)
196543.0 mm (1.7 in)
196669.0 mm (2.7 in)
196737.0 mm (1.5 in)
1968109.0 mm (4.3 in)
196937.0 mm (1.5 in)
197054.0 mm (2.1 in)
197154.0 mm (2.1 in)
197259.0 mm (2.3 in)
197350.0 mm (2.0 in)
197492.0 mm (3.6 in)
197573.0 mm (2.9 in)
197644.0 mm (1.7 in)
197762.0 mm (2.4 in)
1978129.0 mm (5.1 in)
197963.0 mm (2.5 in)
198082.0 mm (3.2 in)
198188.0 mm (3.5 in)
198264.0 mm (2.5 in)
198354.0 mm (2.1 in)
198450.0 mm (2.0 in)
1985142.0 mm (5.6 in)
198646.0 mm (1.8 in)
198761.0 mm (2.4 in)
198891.0 mm (3.6 in)
198981.0 mm (3.2 in)
199052.0 mm (2.0 in)
199173.0 mm (2.9 in)
199254.0 mm (2.1 in)
199378.0 mm (3.1 in)
199458.0 mm (2.3 in)
199565.0 mm (2.6 in)
199662.0 mm (2.4 in)
1997142.0 mm (5.6 in)
199860.0 mm (2.4 in)
199949.0 mm (1.9 in)
200064.0 mm (2.5 in)
200172.0 mm (2.8 in)
200266.0 mm (2.6 in)
200358.0 mm (2.3 in)
200430.0 mm (1.2 in)
20070.3 mm (0.01 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Istanbul by year The longest dry spell of the year at Istanbul, 1929 to 2007. The record is 6 days in 2007, marked on the chart; the median year is 2 days. 02461940196019802000Record: 6 days in 2007
The longest dry spell of the year at Istanbul, 1929 to 2007. The record is 6 days in 2007, marked on the chart; the median year is 2 days.
Longest dry spell (CDD) at Istanbul by year
YearLongest dry spell (CDD)
19292 days
19303 days
19313 days
19322 days
19333 days
19341 day
19352 days
19362 days
19371 day
19382 days
19392 days
19403 days
19412 days
19422 days
19432 days
19441 day
19452 days
19462 days
19472 days
19482 days
19492 days
19503 days
19512 days
19522 days
19532 days
19543 days
19552 days
19563 days
19571 day
19582 days
19592 days
19602 days
19612 days
19622 days
19632 days
19642 days
19653 days
19663 days
19672 days
19682 days
19692 days
19704 days
19713 days
19722 days
19732 days
19742 days
19752 days
19764 days
19773 days
19782 days
19792 days
19802 days
19813 days
19823 days
19833 days
19842 days
19852 days
19863 days
19872 days
19882 days
19894 days
19903 days
19912 days
19921 day
19932 days
19943 days
19953 days
19963 days
19972 days
19982 days
19993 days
20002 days
20011 day
20022 days
20032 days
20042 days
20076 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

56 years with a frost

Across 56 years with a frost, the median last spring frost at Istanbul falls on 19 March and the median first autumn frost on 12 December, which leaves a median of 272 days between them.

Fitted over all years, the growing season changes by +4.5 days per decade at this station.

Frost dates and growing season at Istanbul
MeasureMedian, all yearsEarliest periodRecent period (1961 to 2003)Recent against earliestFitted trend
Last spring frost19 Marchn/a8 Marchn/a-4.8 days per decade
First autumn frost12 Decembern/a16 Decembern/a-0.3 days per decade
Growing days272 daysn/a279 daysn/a+4.5 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

  • Data for Istanbul standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Istanbul threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).