Built 2026-10-19 (19 October 2026)

Rosario Weather Records (MXN00025078)

Record envelope, standing records and threshold days for Rosario (MXN00025078), Mexico, with 51 years of record.

Key Facts for Rosario

  • Rosario (MXN00025078) is a weather station in Mexico at 22.98 latitude and -105.85 longitude, 32 m (104 ft) above sea level.
  • The station reports from 1963 to 2013, 51 years of record.
  • 1,464 records set at Rosario still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Rosario tied a daily record low minimum temperature of 6.7 C (44.1 F) on 2 March 2013.

About the Station

  • Location: Mexico, 22.98 latitude, -105.85 longitude.
  • Elevation: 32 m (104 ft).
  • Period of record: 1963 to 2013, 51 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Rosario, with 2026 drawn through them The band shows the record high and record low for each calendar day at Rosario. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Rosario. 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 Rosario, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan36.7 C (98.1 F)5.6 C (42.1 F)n/an/a
Feb35.6 C (96.1 F)3.9 C (39.0 F)n/an/a
Mar39.4 C (102.9 F)6.1 C (43.0 F)n/an/a
Apr40.0 C (104.0 F)7.8 C (46.0 F)n/an/a
May40.0 C (104.0 F)10.6 C (51.1 F)n/an/a
Jun40.6 C (105.1 F)11.7 C (53.1 F)n/an/a
Jul40.6 C (105.1 F)17.2 C (63.0 F)n/an/a
Aug38.9 C (102.0 F)17.8 C (64.0 F)n/an/a
Sep38.9 C (102.0 F)17.2 C (63.0 F)n/an/a
Oct38.3 C (100.9 F)12.8 C (55.0 F)n/an/a
Nov38.9 C (102.0 F)7.8 C (46.0 F)n/an/a
Dec36.1 C (97.0 F)6.7 C (44.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Rosario by the year they were set 1,464 records at Rosario still stand. 1979 holds the most, with 61. 0204060801963: 241964: 551965: 531966: 421967: 321968: 391969: 381970: 211971: 371972: 341973: 391974: 391975: 561976: 241977: 201978: 291979: 611980: 431981: 271982: 561983: 411984: 311985: 181986: 361987: 571988: 211989: 251990: 381991: 261992: 321993: 111994: 111995: 251996: 151997: 301998: 171999: 122000: 182001: 122002: 222003: 122004: 152005: 142006: 172007: 222008: 262009: 222010: 322011: 202012: 171963196819731978198319881993199820032008
1,464 records at Rosario still stand. 1979 holds the most, with 61.
Standing records at Rosario by the year they were set
Year setStanding records
196324
196455
196553
196642
196732
196839
196938
197021
197137
197234
197339
197439
197556
197624
197720
197829
197961
198043
198127
198256
198341
198431
198518
198636
198757
198821
198925
199038
199126
199232
199311
199411
199525
199615
199730
199817
199912
200018
200112
200222
200312
200415
200514
200617
200722
200826
200922
201032
201120
201217

All-Time Record Progression

1 new records
When Rosario set new all-time records 1 all-time records were set at Rosario between 5 February 2011 and 5 February 2011. Each dot is a new record. Record low minimum temperature5 February 2011: Record low minimum temperature 3.9 C (39.0 F)
1 all-time records were set at Rosario between 5 February 2011 and 5 February 2011. Each dot is a new record.
When Rosario set new all-time records
DateKindDetail
2011-02-05Record low minimum temperatureRecord low minimum temperature 3.9 C (39.0 F)

Wettest Day of Each Month

Nov: 268.0 mm (10.6 in)
Record daily precipitation for each month at Rosario The wettest day on record for each calendar month at Rosario. The most was 268.0 mm (10.6 in) on 23 November 1972. 0100200300 Jan: 84.8 mm (3.3 in), 12 January 1985 Jan Feb: 133.9 mm (5.3 in), 17 February 2010 Feb Mar: 59.9 mm (2.4 in), 16 March 2009 Mar Apr: 12.4 mm (0.5 in), 13 April 1997 Apr May: 55.4 mm (2.2 in), 27 May 1983 May Jun: 148.8 mm (5.9 in), 20 June 2012 Jun Jul: 201.9 mm (7.9 in), 17 July 1998 Jul Aug: 146.8 mm (5.8 in), 14 August 2012 Aug Sep: 252.7 mm (9.9 in), 25 September 1965 Sep Oct: 199.9 mm (7.9 in), 21 October 1986 Oct Nov: 268.0 mm (10.6 in), 23 November 1972 Nov Dec: 69.9 mm (2.8 in), 25 December 1974 Dec
The wettest day on record for each calendar month at Rosario. The most was 268.0 mm (10.6 in) on 23 November 1972.
Record daily precipitation for each month at Rosario
MonthRecord daily precipitation (mm)Date
Jan84.8 mm (3.3 in)12 January 1985
Feb133.9 mm (5.3 in)17 February 2010
Mar59.9 mm (2.4 in)16 March 2009
Apr12.4 mm (0.5 in)13 April 1997
May55.4 mm (2.2 in)27 May 1983
Jun148.8 mm (5.9 in)20 June 2012
Jul201.9 mm (7.9 in)17 July 1998
Aug146.8 mm (5.8 in)14 August 2012
Sep252.7 mm (9.9 in)25 September 1965
Oct199.9 mm (7.9 in)21 October 1986
Nov268.0 mm (10.6 in)23 November 1972
Dec69.9 mm (2.8 in)25 December 1974

Period of Record Coverage

1963 to 2013
Days with data per year at Rosario 51 years of record at Rosario, 1963 to 2013. 4 years have data for under 90 percent of days and are left out of rankings: 1963, 1993, 1995, 2013. 1963: 196 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 364 of 365 days1970: 363 of 365 days1971: 364 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 364 of 365 days1975: 347 of 365 days1976: 366 of 366 days1977: 364 of 365 days1978: 365 of 365 days1979: 364 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 364 of 365 days1983: 335 of 365 days1984: 366 of 366 days1985: 364 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 337 of 365 days1990: 365 of 365 days1991: 363 of 365 days1992: 336 of 366 days1993: 271 of 365 days1994: 365 of 365 days1995: 272 of 365 days1996: 366 of 366 days1997: 357 of 365 days1998: 363 of 365 days1999: 334 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 364 of 365 days2006: 365 of 365 days2007: 363 of 365 days2008: 366 of 366 days2009: 333 of 365 days2010: 363 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 90 of 365 days19701980199020002010
51 years of record at Rosario, 1963 to 2013. 4 years have data for under 90 percent of days and are left out of rankings: 1963, 1993, 1995, 2013.
Days with data per year at Rosario
YearDays with dataShare of yearComplete
196319654%No
1964365100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969364100%Yes
197036399%Yes
1971364100%Yes
1972366100%Yes
1973365100%Yes
1974364100%Yes
197534795%Yes
1976366100%Yes
1977364100%Yes
1978365100%Yes
1979364100%Yes
1980366100%Yes
1981365100%Yes
1982364100%Yes
198333592%Yes
1984366100%Yes
1985364100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
198933792%Yes
1990365100%Yes
199136399%Yes
199233692%Yes
199327174%No
1994365100%Yes
199527275%No
1996366100%Yes
199735798%Yes
199836399%Yes
199933492%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005364100%Yes
2006365100%Yes
200736399%Yes
2008366100%Yes
200933391%Yes
201036399%Yes
2011365100%Yes
2012366100%Yes
20139025%No

Latest Records

20
Latest records at Rosario
DateStationRecordValueBeat old record byOld record stoodSignificance
2 March 2013Rosario, MXdaily low min (Tie)6.7 C (44.1 F)tie48 years4 of 100 (Routine)
24 January 2013Rosario, MXdaily high max (Tie)32.8 C (91.0 F)tie32 years3 of 100 (Routine)
10 January 2013Rosario, MXdaily high max (Tie)32.8 C (91.0 F)tie33 years3 of 100 (Routine)
11 December 2012Rosario, MXdaily high min20.6 C (69.1 F)0.6 C (1.1 F)49 years21 of 100 (Routine)
9 December 2012Rosario, MXdaily high min (Tie)18.9 C (66.0 F)tie47 years4 of 100 (Routine)
8 December 2012Rosario, MXdaily high min (Tie)20.0 C (68.0 F)tie6 years1 of 100 (Routine)
17 October 2012Rosario, MXdaily low max25.0 C (77.0 F)3.9 C (7.0 F)16 years29 of 100 (Routine)
17 October 2012Rosario, MXdaily rain21.8 mm (0.9 in)3.0 mm (0.12 in)40 years18 of 100 (Routine)
16 October 2012Rosario, MXdaily low max26.7 C (80.1 F)1.1 C (2.0 F)14 years14 of 100 (Routine)
15 October 2012Rosario, MXdaily rain50.8 mm (2.0 in)34.0 mm (1.3 in)20 years23 of 100 (Routine)
8 October 2012Rosario, MXdaily high min (Tie)25.0 C (77.0 F)tie39 years4 of 100 (Routine)
22 September 2012Rosario, MXdaily high min (Tie)25.6 C (78.1 F)tie35 years3 of 100 (Routine)
20 September 2012Rosario, MXdaily high min (Tie)25.6 C (78.1 F)tie30 years3 of 100 (Routine)
5 September 2012Rosario, MXdaily high min (Tie)25.6 C (78.1 F)tie25 years3 of 100 (Routine)
20 August 2012Rosario, MXdaily low max28.9 C (84.0 F)1.1 C (2.0 F)24 years18 of 100 (Routine)
19 August 2012Rosario, MXdaily low max27.8 C (82.0 F)2.2 C (4.0 F)24 years25 of 100 (Routine)
19 August 2012Rosario, MXdaily high min (Tie)25.0 C (77.0 F)tie48 years4 of 100 (Routine)
14 August 2012Rosario, MXmonthly rain146.8 mm (5.8 in)22.8 mm (0.9 in)41 years38 of 100 (Notable)
14 August 2012Rosario, MXdaily low min20.6 C (69.1 F)0.5 C (0.9 F)43 years21 of 100 (Routine)
3 August 2012Rosario, MXdaily rain84.8 mm (3.3 in)34.0 mm (1.3 in)1 year22 of 100 (Routine)

Climate Trend

41 complete years, 1964 to 2012
Annual mean temperature at Rosario as warming stripes, 1964 to 2012 One stripe for each of 41 complete years at Rosario, 1964 to 2012. Blue stripes are years cooler than the station's own mean of 25.4 C (77.7 F); red stripes are warmer. The coolest year was 2010, at 24.5 C (76.1 F), and the warmest was 1990, at 26.2 C (79.1 F). The strongest colour marks a difference of 1.0 C (1.8 F). 1964: 25.1 C, -0.4 C from the station mean1965: 25.3 C, -0.1 C from the station mean1966: 25.8 C, +0.4 C from the station mean1967: 25.5 C, +0.1 C from the station mean1968: 25.2 C, -0.2 C from the station mean1969: 25.3 C, -0.1 C from the station mean1970: 24.9 C, -0.5 C from the station mean1971: 24.9 C, -0.5 C from the station mean1972: 25.8 C, +0.4 C from the station mean1973: 25.0 C, -0.5 C from the station mean1974: 25.1 C, -0.3 C from the station mean1976: 25.3 C, -0.1 C from the station mean1977: 25.6 C, +0.2 C from the station mean1978: 25.8 C, +0.3 C from the station mean1979: 25.4 C, 0.0 C from the station mean1980: 25.8 C, +0.4 C from the station mean1981: 25.5 C, +0.1 C from the station mean1982: 25.7 C, +0.3 C from the station mean1984: 25.5 C, +0.1 C from the station mean1985: 25.3 C, -0.1 C from the station mean1986: 25.8 C, +0.4 C from the station mean1987: 25.7 C, +0.3 C from the station mean1988: 25.6 C, +0.2 C from the station mean1990: 26.2 C, +0.8 C from the station mean1991: 25.8 C, +0.4 C from the station mean1994: 26.1 C, +0.7 C from the station mean1996: 25.6 C, +0.2 C from the station mean1997: 25.4 C, 0.0 C from the station mean1998: 25.2 C, -0.2 C from the station mean2000: 25.0 C, -0.4 C from the station mean2001: 25.3 C, -0.1 C from the station mean2002: 25.8 C, +0.3 C from the station mean2003: 25.6 C, +0.2 C from the station mean2004: 25.1 C, -0.3 C from the station mean2005: 25.0 C, -0.5 C from the station mean2006: 25.6 C, +0.2 C from the station mean2007: 25.4 C, 0.0 C from the station mean2008: 24.9 C, -0.5 C from the station mean2010: 24.5 C, -0.9 C from the station mean2011: 24.7 C, -0.7 C from the station mean2012: 25.3 C, -0.1 C from the station mean1964197019751980198519901995200020052010
One stripe for each of 41 complete years at Rosario, 1964 to 2012. Blue stripes are years cooler than the station's own mean of 25.4 C (77.7 F); red stripes are warmer. The coolest year was 2010, at 24.5 C (76.1 F), and the warmest was 1990, at 26.2 C (79.1 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Rosario as warming stripes, 1964 to 2012
YearAnnual mean temperatureDifference from the station mean
196425.1 C-0.35 C
196525.3 C-0.06 C
196625.8 C+0.43 C
196725.5 C+0.13 C
196825.2 C-0.24 C
196925.3 C-0.09 C
197024.9 C-0.46 C
197124.9 C-0.49 C
197225.8 C+0.40 C
197325.0 C-0.45 C
197425.1 C-0.30 C
197625.3 C-0.11 C
197725.6 C+0.21 C
197825.8 C+0.35 C
197925.4 C0.00 C
198025.8 C+0.38 C
198125.5 C+0.10 C
198225.7 C+0.32 C
198425.5 C+0.12 C
198525.3 C-0.09 C
198625.8 C+0.44 C
198725.7 C+0.27 C
198825.6 C+0.16 C
199026.2 C+0.79 C
199125.8 C+0.42 C
199426.1 C+0.73 C
199625.6 C+0.19 C
199725.4 C0.00 C
199825.2 C-0.17 C
200025.0 C-0.36 C
200125.3 C-0.07 C
200225.8 C+0.35 C
200325.6 C+0.24 C
200425.1 C-0.26 C
200525.0 C-0.45 C
200625.6 C+0.20 C
200725.4 C+0.02 C
200824.9 C-0.48 C
201024.5 C-0.90 C
201124.7 C-0.66 C
201225.3 C-0.10 C

The fitted trend in annual mean temperature here over 1964 to 2012 is -0.03 C (-0.11 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.2 to 0.1) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Rosario
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.03 C (-0.11 to 0.05) per decade-0.1 F (-0.2 to 0.1) per decade1964 to 201241Not clearly different from zero
Mean daily maximum-0.16 C (-0.27 to -0.05) per decade-0.3 F (-0.5 to -0.1) per decade1964 to 201241Fall
Mean daily minimum0.09 C (0.00 to 0.18) per decade0.16 F (0.01 to 0.32) per decade1964 to 201241Rise

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

1963 to 2013
Yearly extremes at Rosario: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.6 C (105.1 F)197938.3 C (100.9 F)51
Coldest night (TNn)3.9 C (39.0 F)20117.8 C (46.0 F)51
Wettest day (Rx1day)268.0 mm (10.6 in)197290.9 mm (3.6 in)51
Wettest five days (Rx5day)394.6 mm (15.5 in)1965156.6 mm (6.2 in)51
Longest dry spell (CDD)214 days2006128 days51

Hottest day (TXx)

Hottest day (TXx) at Rosario by year The hottest day of the year at Rosario, 1963 to 2013. The record is 40.6 C (105.1 F) in 1979, marked on the chart; the median year is 38.3 C (100.9 F). 343638404219701980199020002010Record: 40.6 C (105.1 F) in 1979
The hottest day of the year at Rosario, 1963 to 2013. The record is 40.6 C (105.1 F) in 1979, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Rosario by year
YearHottest day (TXx)
196338.3 C (100.9 F)
196438.3 C (100.9 F)
196538.3 C (100.9 F)
196638.3 C (100.9 F)
196738.3 C (100.9 F)
196838.9 C (102.0 F)
196940.0 C (104.0 F)
197037.8 C (100.0 F)
197140.0 C (104.0 F)
197238.9 C (102.0 F)
197338.3 C (100.9 F)
197438.3 C (100.9 F)
197538.9 C (102.0 F)
197638.9 C (102.0 F)
197739.4 C (102.9 F)
197839.4 C (102.9 F)
197940.6 C (105.1 F)
198039.4 C (102.9 F)
198137.8 C (100.0 F)
198240.6 C (105.1 F)
198338.9 C (102.0 F)
198438.3 C (100.9 F)
198538.3 C (100.9 F)
198640.0 C (104.0 F)
198740.6 C (105.1 F)
198838.9 C (102.0 F)
198938.3 C (100.9 F)
199039.4 C (102.9 F)
199139.4 C (102.9 F)
199240.0 C (104.0 F)
199338.3 C (100.9 F)
199438.3 C (100.9 F)
199538.9 C (102.0 F)
199637.8 C (100.0 F)
199738.3 C (100.9 F)
199838.3 C (100.9 F)
199937.2 C (99.0 F)
200037.8 C (100.0 F)
200137.8 C (100.0 F)
200238.9 C (102.0 F)
200338.9 C (102.0 F)
200439.4 C (102.9 F)
200536.1 C (97.0 F)
200637.8 C (100.0 F)
200737.8 C (100.0 F)
200837.8 C (100.0 F)
200936.7 C (98.1 F)
201036.7 C (98.1 F)
201136.7 C (98.1 F)
201240.0 C (104.0 F)
201335.6 C (96.1 F)

Coldest night (TNn)

Coldest night (TNn) at Rosario by year The coldest night of the year at Rosario, 1963 to 2013. The record is 3.9 C (39.0 F) in 2011, marked on the chart; the median year is 7.8 C (46.0 F). 2468101219701980199020002010Record: 3.9 C (39.0 F) in 2011
The coldest night of the year at Rosario, 1963 to 2013. The record is 3.9 C (39.0 F) in 2011, marked on the chart; the median year is 7.8 C (46.0 F).
Coldest night (TNn) at Rosario by year
YearColdest night (TNn)
196310.6 C (51.1 F)
19645.0 C (41.0 F)
19656.1 C (43.0 F)
19667.8 C (46.0 F)
19676.7 C (44.1 F)
19686.1 C (43.0 F)
19696.7 C (44.1 F)
19708.9 C (48.0 F)
19715.6 C (42.1 F)
19727.2 C (45.0 F)
19738.3 C (46.9 F)
19745.6 C (42.1 F)
19757.8 C (46.0 F)
19767.8 C (46.0 F)
19778.9 C (48.0 F)
19789.4 C (48.9 F)
19797.8 C (46.0 F)
19808.3 C (46.9 F)
19818.9 C (48.0 F)
19828.9 C (48.0 F)
198310.0 C (50.0 F)
19846.7 C (44.1 F)
19857.8 C (46.0 F)
19867.8 C (46.0 F)
19876.7 C (44.1 F)
19885.6 C (42.1 F)
19897.8 C (46.0 F)
19908.3 C (46.9 F)
19917.8 C (46.0 F)
199210.0 C (50.0 F)
19937.8 C (46.0 F)
19948.9 C (48.0 F)
19958.9 C (48.0 F)
19968.9 C (48.0 F)
19975.6 C (42.1 F)
19988.9 C (48.0 F)
19998.3 C (46.9 F)
20007.2 C (45.0 F)
20017.8 C (46.0 F)
20027.2 C (45.0 F)
20038.9 C (48.0 F)
20047.8 C (46.0 F)
200510.0 C (50.0 F)
20066.7 C (44.1 F)
20076.7 C (44.1 F)
20085.6 C (42.1 F)
200910.0 C (50.0 F)
201010.0 C (50.0 F)
20113.9 C (39.0 F)
20128.9 C (48.0 F)
20136.7 C (44.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Rosario by year The wettest day of the year at Rosario, 1963 to 2013. The record is 268.0 mm (10.6 in) in 1972, marked on the chart; the median year is 90.9 mm (3.6 in). 010020030019701980199020002010Record: 268.0 mm (10.6 in) in 1972
The wettest day of the year at Rosario, 1963 to 2013. The record is 268.0 mm (10.6 in) in 1972, marked on the chart; the median year is 90.9 mm (3.6 in).
Wettest day (Rx1day) at Rosario by year
YearWettest day (Rx1day)
196379.2 mm (3.1 in)
1964159.8 mm (6.3 in)
1965252.7 mm (9.9 in)
1966129.3 mm (5.1 in)
196794.7 mm (3.7 in)
1968239.8 mm (9.4 in)
196980.8 mm (3.2 in)
1970192.8 mm (7.6 in)
197185.9 mm (3.4 in)
1972268.0 mm (10.6 in)
1973111.3 mm (4.4 in)
1974109.0 mm (4.3 in)
197584.8 mm (3.3 in)
197686.9 mm (3.4 in)
197795.0 mm (3.7 in)
197852.8 mm (2.1 in)
197978.0 mm (3.1 in)
198059.9 mm (2.4 in)
198197.8 mm (3.9 in)
198286.9 mm (3.4 in)
198377.5 mm (3.1 in)
198480.8 mm (3.2 in)
198589.9 mm (3.5 in)
1986199.9 mm (7.9 in)
1987151.9 mm (6.0 in)
1988167.9 mm (6.6 in)
198963.8 mm (2.5 in)
1990112.8 mm (4.4 in)
199165.8 mm (2.6 in)
1992157.0 mm (6.2 in)
199381.8 mm (3.2 in)
1994103.4 mm (4.1 in)
199557.4 mm (2.3 in)
199690.9 mm (3.6 in)
199763.0 mm (2.5 in)
1998201.9 mm (7.9 in)
1999121.9 mm (4.8 in)
2000119.9 mm (4.7 in)
2001153.9 mm (6.1 in)
200277.0 mm (3.0 in)
200380.8 mm (3.2 in)
200484.8 mm (3.3 in)
2005118.9 mm (4.7 in)
200687.9 mm (3.5 in)
200780.8 mm (3.2 in)
200880.8 mm (3.2 in)
200959.9 mm (2.4 in)
2010159.8 mm (6.3 in)
2011100.8 mm (4.0 in)
2012148.8 mm (5.9 in)
20132.8 mm (0.11 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Rosario by year The wettest five days of the year at Rosario, 1963 to 2013. The record is 394.6 mm (15.5 in) in 1965, marked on the chart; the median year is 156.6 mm (6.2 in). 010020030040019701980199020002010Record: 394.6 mm (15.5 in) in 1965
The wettest five days of the year at Rosario, 1963 to 2013. The record is 394.6 mm (15.5 in) in 1965, marked on the chart; the median year is 156.6 mm (6.2 in).
Wettest five days (Rx5day) at Rosario by year
YearWettest five days (Rx5day)
1963149.9 mm (5.9 in)
1964177.9 mm (7.0 in)
1965394.6 mm (15.5 in)
1966165.7 mm (6.5 in)
1967110.8 mm (4.4 in)
1968325.7 mm (12.8 in)
1969129.3 mm (5.1 in)
1970343.7 mm (13.5 in)
1971141.2 mm (5.6 in)
1972290.4 mm (11.4 in)
1973120.4 mm (4.7 in)
1974162.4 mm (6.4 in)
1975161.8 mm (6.4 in)
1976149.3 mm (5.9 in)
1977180.1 mm (7.1 in)
1978106.6 mm (4.2 in)
1979140.5 mm (5.5 in)
198092.9 mm (3.7 in)
1981150.9 mm (5.9 in)
1982111.3 mm (4.4 in)
1983155.5 mm (6.1 in)
1984106.8 mm (4.2 in)
1985148.6 mm (5.9 in)
1986310.7 mm (12.2 in)
1987279.4 mm (11.0 in)
1988258.9 mm (10.2 in)
198994.6 mm (3.7 in)
1990173.5 mm (6.8 in)
1991141.7 mm (5.6 in)
1992225.7 mm (8.9 in)
1993149.1 mm (5.9 in)
1994134.9 mm (5.3 in)
199581.7 mm (3.2 in)
1996156.6 mm (6.2 in)
1997130.1 mm (5.1 in)
1998236.5 mm (9.3 in)
1999195.8 mm (7.7 in)
2000157.5 mm (6.2 in)
2001164.1 mm (6.5 in)
2002167.7 mm (6.6 in)
2003217.7 mm (8.6 in)
2004149.4 mm (5.9 in)
2005199.4 mm (7.9 in)
2006269.3 mm (10.6 in)
2007112.5 mm (4.4 in)
2008108.5 mm (4.3 in)
200968.6 mm (2.7 in)
2010193.3 mm (7.6 in)
2011159.0 mm (6.3 in)
2012311.2 mm (12.3 in)
20132.8 mm (0.11 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Rosario by year The longest dry spell of the year at Rosario, 1963 to 2013. The record is 214 days in 2006, marked on the chart; the median year is 128 days. 05010015020025019701980199020002010Record: 214 days in 2006
The longest dry spell of the year at Rosario, 1963 to 2013. The record is 214 days in 2006, marked on the chart; the median year is 128 days.
Longest dry spell (CDD) at Rosario by year
YearLongest dry spell (CDD)
196338 days
1964141 days
1965144 days
196686 days
1967131 days
1968105 days
1969134 days
197082 days
1971160 days
1972155 days
197395 days
1974146 days
1975142 days
1976164 days
197781 days
1978138 days
1979129 days
1980128 days
1981118 days
1982181 days
198375 days
1984135 days
198581 days
198688 days
1987124 days
1988167 days
1989113 days
199078 days
1991135 days
1992120 days
1993173 days
1994165 days
199595 days
1996153 days
199760 days
1998128 days
1999120 days
2000163 days
2001105 days
2002156 days
2003150 days
2004100 days
2005124 days
2006214 days
2007171 days
2008159 days
200974 days
2010118 days
2011182 days
2012122 days
201382 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.

Rainfall Return Levels

47 years, 1964 to 2012

A day with at least 101.7 mm (4.0 in) of rain is expected about once in 2 years. A day with at least 338.3 mm (13.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Rosario: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years101.7 mm (4.0 in)
5 years145.4 mm (5.7 in)
10 years180.9 mm (7.1 in)
25 years234.9 mm (9.2 in)
50 years282.8 mm (11.1 in)Longer than the 47 years of record
100 years338.3 mm (13.3 in)Longer than the 47 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 47 years of values from 1964 to 2012.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 268.0 mm (10.6 in) in 1972; 252.7 mm (9.9 in) in 1965; 239.8 mm (9.4 in) in 1968.

Download the Data

  • Data for Rosario standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Rosario 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).