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Altamira Weather Records (MXN00024002)

Record envelope, standing records and threshold days for Altamira (MXN00024002), Mexico, with 51 years of record.

Key Facts for Altamira

  • Altamira (MXN00024002) is a weather station in Mexico at 21.67 latitude and -98.97 longitude, 60 m (196 ft) above sea level.
  • The station reports from 1961 to 2011, 51 years of record.
  • 1,464 records set at Altamira still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Altamira tied a daily record low maximum temperature of 28.9 C (84.0 F) on 21 August 2011.

About the Station

  • Location: Mexico, 21.67 latitude, -98.97 longitude.
  • Elevation: 60 m (196 ft).
  • Period of record: 1961 to 2011, 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 Altamira, with 2026 drawn through them The band shows the record high and record low for each calendar day at Altamira. 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 Altamira. 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 Altamira, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan42.2 C (108.0 F)-6.1 C (21.0 F)n/an/a
Feb46.7 C (116.1 F)0.0 C (32.0 F)n/an/a
Mar50.0 C (122.0 F)5.0 C (41.0 F)n/an/a
Apr53.9 C (129.0 F)6.7 C (44.1 F)n/an/a
May51.7 C (125.1 F)10.0 C (50.0 F)n/an/a
Jun50.6 C (123.1 F)12.8 C (55.0 F)n/an/a
Jul45.6 C (114.1 F)11.7 C (53.1 F)n/an/a
Aug45.6 C (114.1 F)12.8 C (55.0 F)n/an/a
Sep46.7 C (116.1 F)10.6 C (51.1 F)n/an/a
Oct46.7 C (116.1 F)5.0 C (41.0 F)n/an/a
Nov40.0 C (104.0 F)2.8 C (37.0 F)n/an/a
Dec38.9 C (102.0 F)0.0 C (32.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Altamira by the year they were set 1,464 records at Altamira still stand. 1962 holds the most, with 143. 0501001501961: 991962: 1431963: 231964: 341965: 221966: 181967: 1121969: 131970: 281971: 181972: 81973: 321974: 151975: 151976: 211977: 161978: 131979: 191980: 151981: 111982: 141983: 101984: 261985: 131986: 31987: 131988: 151989: 161990: 201991: 281992: 931993: 421994: 191995: 361996: 381997: 241998: 911999: 432000: 482001: 442002: 222003: 552004: 92005: 92006: 112007: 82008: 102009: 102010: 112011: 81961196619721977198219871992199720022007
1,464 records at Altamira still stand. 1962 holds the most, with 143.
Standing records at Altamira by the year they were set
Year setStanding records
196199
1962143
196323
196434
196522
196618
1967112
196913
197028
197118
19728
197332
197415
197515
197621
197716
197813
197919
198015
198111
198214
198310
198426
198513
19863
198713
198815
198916
199020
199128
199293
199342
199419
199536
199638
199724
199891
199943
200048
200144
200222
200355
20049
20059
200611
20078
200810
200910
201011
20118

All-Time Record Progression

2 new records
When Altamira set new all-time records 2 all-time records were set at Altamira between 16 April 1998 and 17 April 1998. Each dot is a new record. Record high maximum temperature16 April 1998: Record high maximum temperature 50.0 C (122.0 F)17 April 1998: Record high maximum temperature 53.9 C (129.0 F)
2 all-time records were set at Altamira between 16 April 1998 and 17 April 1998. Each dot is a new record.
When Altamira set new all-time records
DateKindDetail
1998-04-16Record high maximum temperatureRecord high maximum temperature 50.0 C (122.0 F)
1998-04-17Record high maximum temperatureRecord high maximum temperature 53.9 C (129.0 F)

Wettest Day of Each Month

Jul: 270.8 mm (10.7 in)
Record daily precipitation for each month at Altamira The wettest day on record for each calendar month at Altamira. The most was 270.8 mm (10.7 in) on 1 July 1991. 0100200300 Jan: 39.9 mm (1.6 in), 19 January 1975 Jan Feb: 88.4 mm (3.5 in), 18 February 1970 Feb Mar: 84.8 mm (3.3 in), 1 March 1995 Mar Apr: 81.8 mm (3.2 in), 15 April 1991 Apr May: 199.9 mm (7.9 in), 24 May 1971 May Jun: 174.8 mm (6.9 in), 25 June 1966 Jun Jul: 270.8 mm (10.7 in), 1 July 1991 Jul Aug: 200.7 mm (7.9 in), 7 August 1990 Aug Sep: 240.3 mm (9.5 in), 3 September 1988 Sep Oct: 245.9 mm (9.7 in), 14 October 1966 Oct Nov: 149.1 mm (5.9 in), 28 November 1962 Nov Dec: 90.7 mm (3.6 in), 4 December 1981 Dec
The wettest day on record for each calendar month at Altamira. The most was 270.8 mm (10.7 in) on 1 July 1991.
Record daily precipitation for each month at Altamira
MonthRecord daily precipitation (mm)Date
Jan39.9 mm (1.6 in)19 January 1975
Feb88.4 mm (3.5 in)18 February 1970
Mar84.8 mm (3.3 in)1 March 1995
Apr81.8 mm (3.2 in)15 April 1991
May199.9 mm (7.9 in)24 May 1971
Jun174.8 mm (6.9 in)25 June 1966
Jul270.8 mm (10.7 in)1 July 1991
Aug200.7 mm (7.9 in)7 August 1990
Sep240.3 mm (9.5 in)3 September 1988
Oct245.9 mm (9.7 in)14 October 1966
Nov149.1 mm (5.9 in)28 November 1962
Dec90.7 mm (3.6 in)4 December 1981

Period of Record Coverage

1961 to 2011
Days with data per year at Altamira 50 years of record at Altamira, 1961 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1969, 1972, 1987, 2001, 2011. 1961: 365 of 365 days1962: 365 of 365 days1963: 360 of 365 days1964: 332 of 366 days1965: 363 of 365 days1966: 359 of 365 days1967: 350 of 365 days1969: 321 of 365 days1970: 363 of 365 days1971: 354 of 365 days1972: 308 of 366 days1973: 361 of 365 days1974: 363 of 365 days1975: 364 of 365 days1976: 365 of 366 days1977: 365 of 365 days1978: 357 of 365 days1979: 363 of 365 days1980: 358 of 366 days1981: 361 of 365 days1982: 360 of 365 days1983: 333 of 365 days1984: 333 of 366 days1985: 336 of 365 days1986: 334 of 365 days1987: 273 of 365 days1988: 365 of 366 days1989: 361 of 365 days1990: 355 of 365 days1991: 359 of 365 days1992: 354 of 366 days1993: 353 of 365 days1994: 353 of 365 days1995: 358 of 365 days1996: 355 of 366 days1997: 353 of 365 days1998: 363 of 365 days1999: 364 of 365 days2000: 366 of 366 days2001: 301 of 365 days2002: 357 of 365 days2003: 361 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 273 of 365 days19701980199020002010
50 years of record at Altamira, 1961 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1969, 1972, 1987, 2001, 2011.
Days with data per year at Altamira
YearDays with dataShare of yearComplete
1961365100%Yes
1962365100%Yes
196336099%Yes
196433291%Yes
196536399%Yes
196635998%Yes
196735096%Yes
196932188%No
197036399%Yes
197135497%Yes
197230884%No
197336199%Yes
197436399%Yes
1975364100%Yes
1976365100%Yes
1977365100%Yes
197835798%Yes
197936399%Yes
198035898%Yes
198136199%Yes
198236099%Yes
198333391%Yes
198433391%Yes
198533692%Yes
198633492%Yes
198727375%No
1988365100%Yes
198936199%Yes
199035597%Yes
199135998%Yes
199235497%Yes
199335397%Yes
199435397%Yes
199535898%Yes
199635597%Yes
199735397%Yes
199836399%Yes
1999364100%Yes
2000366100%Yes
200130182%No
200235798%Yes
200336199%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
201127375%No

Latest Records

20
Latest records at Altamira
DateStationRecordValueBeat old record byOld record stoodSignificance
21 August 2011Altamira, MXdaily low max (Tie)28.9 C (84.0 F)tie5 years1 of 100 (Routine)
25 July 2011Altamira, MXdaily high min25.6 C (78.1 F)0.6 C (1.1 F)18 years13 of 100 (Routine)
22 July 2011Altamira, MXdaily rain83.1 mm (3.3 in)12.7 mm (0.5 in)38 years19 of 100 (Routine)
20 July 2011Altamira, MXdaily high min (Tie)25.0 C (77.0 F)tie40 years4 of 100 (Routine)
7 July 2011Altamira, MXdaily high max43.9 C (111.0 F)3.3 C (5.9 F)12 years18 of 100 (Routine)
6 July 2011Altamira, MXdaily high max (Tie)40.0 C (104.0 F)tie48 years4 of 100 (Routine)
4 July 2011Altamira, MXdaily high max40.6 C (105.1 F)0.6 C (1.1 F)12 years9 of 100 (Routine)
20 May 2011Altamira, MXdaily high max (Tie)42.8 C (109.0 F)tie12 years2 of 100 (Routine)
4 May 2011Altamira, MXdaily low max (Tie)26.7 C (80.1 F)tie5 years1 of 100 (Routine)
28 April 2011Altamira, MXdaily high max48.9 C (120.0 F)3.3 C (5.9 F)40 years23 of 100 (Routine)
5 April 2011Altamira, MXdaily high max45.6 C (114.1 F)3.4 C (6.1 F)28 years19 of 100 (Routine)
29 March 2011Altamira, MXdaily high max (Tie)42.2 C (108.0 F)tie10 years2 of 100 (Routine)
26 February 2011Altamira, MXdaily high min (Tie)21.7 C (71.1 F)tie19 years2 of 100 (Routine)
25 February 2011Altamira, MXdaily high min22.2 C (72.0 F)1.6 C (2.9 F)19 years14 of 100 (Routine)
5 February 2011Altamira, MXdaily low max16.7 C (62.1 F)0.5 C (0.9 F)33 years15 of 100 (Routine)
5 February 2011Altamira, MXdaily low min (Tie)3.3 C (37.9 F)tie48 years4 of 100 (Routine)
3 February 2011Altamira, MXdaily low min (Tie)4.4 C (39.9 F)tie35 years3 of 100 (Routine)
2 February 2011Altamira, MXdaily low min5.0 C (41.0 F)2.2 C (4.0 F)48 years24 of 100 (Routine)
13 December 2010Altamira, MXdaily low min (Tie)5.0 C (41.0 F)tie20 years2 of 100 (Routine)
12 December 2010Altamira, MXdaily low min (Tie)5.6 C (42.1 F)tie20 years2 of 100 (Routine)

Climate Trend

39 complete years, 1961 to 2010
Annual mean temperature at Altamira as warming stripes, 1961 to 2010 One stripe for each of 39 complete years at Altamira, 1961 to 2010. Blue stripes are years cooler than the station's own mean of 25.2 C (77.3 F); red stripes are warmer. The coolest year was 1993, at 23.8 C (74.8 F), and the warmest was 1998, at 28.6 C (83.5 F). The strongest colour marks a difference of 3.5 C (6.3 F). 1961: 25.2 C, 0.0 C from the station mean1962: 26.1 C, +0.9 C from the station mean1963: 24.9 C, -0.3 C from the station mean1965: 24.7 C, -0.5 C from the station mean1966: 24.0 C, -1.1 C from the station mean1970: 24.8 C, -0.4 C from the station mean1971: 26.1 C, +0.9 C from the station mean1973: 24.7 C, -0.5 C from the station mean1974: 25.0 C, -0.2 C from the station mean1975: 25.0 C, -0.1 C from the station mean1976: 24.4 C, -0.7 C from the station mean1977: 25.6 C, +0.4 C from the station mean1978: 24.6 C, -0.6 C from the station mean1979: 24.0 C, -1.2 C from the station mean1980: 24.5 C, -0.7 C from the station mean1981: 24.4 C, -0.8 C from the station mean1982: 25.0 C, -0.2 C from the station mean1988: 24.1 C, -1.1 C from the station mean1989: 24.8 C, -0.3 C from the station mean1990: 24.0 C, -1.2 C from the station mean1991: 24.3 C, -0.9 C from the station mean1992: 24.1 C, -1.1 C from the station mean1993: 23.8 C, -1.4 C from the station mean1994: 24.3 C, -0.9 C from the station mean1995: 25.8 C, +0.6 C from the station mean1996: 25.9 C, +0.7 C from the station mean1997: 24.8 C, -0.4 C from the station mean1998: 28.6 C, +3.4 C from the station mean1999: 28.0 C, +2.8 C from the station mean2000: 28.1 C, +2.9 C from the station mean2002: 26.7 C, +1.5 C from the station mean2003: 27.4 C, +2.2 C from the station mean2004: 24.7 C, -0.5 C from the station mean2005: 24.4 C, -0.8 C from the station mean2006: 25.5 C, +0.3 C from the station mean2007: 24.4 C, -0.8 C from the station mean2008: 25.2 C, 0.0 C from the station mean2009: 25.6 C, +0.4 C from the station mean2010: 24.4 C, -0.8 C from the station mean19611965197019751980198519901995200020052010
One stripe for each of 39 complete years at Altamira, 1961 to 2010. Blue stripes are years cooler than the station's own mean of 25.2 C (77.3 F); red stripes are warmer. The coolest year was 1993, at 23.8 C (74.8 F), and the warmest was 1998, at 28.6 C (83.5 F). The strongest colour marks a difference of 3.5 C (6.3 F).
Annual mean temperature at Altamira as warming stripes, 1961 to 2010
YearAnnual mean temperatureDifference from the station mean
196125.2 C+0.04 C
196226.1 C+0.90 C
196324.9 C-0.25 C
196524.7 C-0.48 C
196624.0 C-1.14 C
197024.8 C-0.36 C
197126.1 C+0.90 C
197324.7 C-0.48 C
197425.0 C-0.21 C
197525.0 C-0.13 C
197624.4 C-0.74 C
197725.6 C+0.40 C
197824.6 C-0.58 C
197924.0 C-1.19 C
198024.5 C-0.68 C
198124.4 C-0.76 C
198225.0 C-0.15 C
198824.1 C-1.07 C
198924.8 C-0.33 C
199024.0 C-1.15 C
199124.3 C-0.85 C
199224.1 C-1.12 C
199323.8 C-1.38 C
199424.3 C-0.89 C
199525.8 C+0.63 C
199625.9 C+0.69 C
199724.8 C-0.39 C
199828.6 C+3.44 C
199928.0 C+2.84 C
200028.1 C+2.90 C
200226.7 C+1.53 C
200327.4 C+2.23 C
200424.7 C-0.50 C
200524.4 C-0.80 C
200625.5 C+0.34 C
200724.4 C-0.78 C
200825.2 C0.00 C
200925.6 C+0.44 C
201024.4 C-0.82 C

The fitted trend in annual mean temperature here over 1961 to 2010 is 0.2 C (-0.1 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.8) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Altamira
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (-0.1 to 0.4) per decade0.3 F (-0.1 to 0.8) per decade1961 to 201039Not clearly different from zero
Mean daily maximum0.1 C (-0.4 to 0.6) per decade0.2 F (-0.7 to 1.1) per decade1961 to 201039Not clearly different from zero
Mean daily minimum0.26 C (-0.01 to 0.54) per decade0.48 F (-0.01 to 0.96) per decade1961 to 201039Not clearly different from zero

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

1961 to 2011
Yearly extremes at Altamira: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)53.9 C (129.0 F)199842.8 C (109.0 F)50
Coldest night (TNn)-6.1 C (21.0 F)19623.9 C (39.0 F)50
Wettest day (Rx1day)270.8 mm (10.7 in)1991124.5 mm (4.9 in)50
Wettest five days (Rx5day)670.4 mm (26.4 in)1991258.6 mm (10.2 in)50
Longest dry spell (CDD)66 days200530 days50

Hottest day (TXx)

Hottest day (TXx) at Altamira by year The hottest day of the year at Altamira, 1961 to 2011. The record is 53.9 C (129.0 F) in 1998, marked on the chart; the median year is 42.8 C (109.0 F). 354045505519701980199020002010Record: 53.9 C (129.0 F) in 1998
The hottest day of the year at Altamira, 1961 to 2011. The record is 53.9 C (129.0 F) in 1998, marked on the chart; the median year is 42.8 C (109.0 F).
Hottest day (TXx) at Altamira by year
YearHottest day (TXx)
196147.8 C (118.0 F)
196246.7 C (116.1 F)
196342.8 C (109.0 F)
196443.9 C (111.0 F)
196542.2 C (108.0 F)
196640.0 C (104.0 F)
196743.9 C (111.0 F)
196943.3 C (109.9 F)
197042.8 C (109.0 F)
197145.6 C (114.1 F)
197237.2 C (99.0 F)
197345.0 C (113.0 F)
197447.8 C (118.0 F)
197545.0 C (113.0 F)
197638.9 C (102.0 F)
197742.2 C (108.0 F)
197845.6 C (114.1 F)
197942.8 C (109.0 F)
198042.8 C (109.0 F)
198140.6 C (105.1 F)
198242.8 C (109.0 F)
198343.3 C (109.9 F)
198448.3 C (118.9 F)
198540.0 C (104.0 F)
198640.0 C (104.0 F)
198741.1 C (106.0 F)
198840.6 C (105.1 F)
198943.3 C (109.9 F)
199038.3 C (100.9 F)
199142.2 C (108.0 F)
199242.2 C (108.0 F)
199340.0 C (104.0 F)
199440.0 C (104.0 F)
199543.9 C (111.0 F)
199642.2 C (108.0 F)
199742.2 C (108.0 F)
199853.9 C (129.0 F)
199951.7 C (125.1 F)
200050.0 C (122.0 F)
200146.7 C (116.1 F)
200246.7 C (116.1 F)
200345.6 C (114.1 F)
200445.6 C (114.1 F)
200542.8 C (109.0 F)
200645.0 C (113.0 F)
200740.0 C (104.0 F)
200845.0 C (113.0 F)
200942.8 C (109.0 F)
201041.7 C (107.1 F)
201148.9 C (120.0 F)

Coldest night (TNn)

Coldest night (TNn) at Altamira by year The coldest night of the year at Altamira, 1961 to 2011. The record is -6.1 C (21.0 F) in 1962, marked on the chart; the median year is 3.9 C (39.0 F). -10-5051019701980199020002010Record: -6.1 C (21.0 F) in 1962
The coldest night of the year at Altamira, 1961 to 2011. The record is -6.1 C (21.0 F) in 1962, marked on the chart; the median year is 3.9 C (39.0 F).
Coldest night (TNn) at Altamira by year
YearColdest night (TNn)
19610.0 C (32.0 F)
1962-6.1 C (21.0 F)
19630.0 C (32.0 F)
19641.7 C (35.1 F)
19652.2 C (36.0 F)
19663.9 C (39.0 F)
19670.0 C (32.0 F)
19695.0 C (41.0 F)
19701.7 C (35.1 F)
19715.6 C (42.1 F)
19727.2 C (45.0 F)
19730.6 C (33.1 F)
19742.8 C (37.0 F)
1975-2.2 C (28.0 F)
19761.1 C (34.0 F)
19773.9 C (39.0 F)
19787.8 C (46.0 F)
19793.3 C (37.9 F)
19805.6 C (42.1 F)
19817.8 C (46.0 F)
19823.9 C (39.0 F)
19838.9 C (48.0 F)
19845.0 C (41.0 F)
19852.8 C (37.0 F)
19865.6 C (42.1 F)
19873.9 C (39.0 F)
19881.7 C (35.1 F)
19890.0 C (32.0 F)
19902.2 C (36.0 F)
19914.4 C (39.9 F)
19925.0 C (41.0 F)
19936.7 C (44.1 F)
19942.8 C (37.0 F)
19955.6 C (42.1 F)
19966.7 C (44.1 F)
19971.7 C (35.1 F)
19988.9 C (48.0 F)
19995.0 C (41.0 F)
20005.6 C (42.1 F)
20016.7 C (44.1 F)
20025.0 C (41.0 F)
20032.8 C (37.0 F)
20040.6 C (33.1 F)
20056.7 C (44.1 F)
20062.8 C (37.0 F)
20075.6 C (42.1 F)
20085.6 C (42.1 F)
20095.6 C (42.1 F)
20103.9 C (39.0 F)
20112.8 C (37.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Altamira by year The wettest day of the year at Altamira, 1961 to 2011. The record is 270.8 mm (10.7 in) in 1991, marked on the chart; the median year is 124.5 mm (4.9 in). 5010015020025030019701980199020002010Record: 270.8 mm (10.7 in) in 1991
The wettest day of the year at Altamira, 1961 to 2011. The record is 270.8 mm (10.7 in) in 1991, marked on the chart; the median year is 124.5 mm (4.9 in).
Wettest day (Rx1day) at Altamira by year
YearWettest day (Rx1day)
1961149.9 mm (5.9 in)
1962149.1 mm (5.9 in)
1963125.5 mm (4.9 in)
1964108.0 mm (4.3 in)
196597.8 mm (3.9 in)
1966245.9 mm (9.7 in)
1967131.8 mm (5.2 in)
1969140.0 mm (5.5 in)
1970159.8 mm (6.3 in)
1971199.9 mm (7.9 in)
1972127.8 mm (5.0 in)
1973123.4 mm (4.9 in)
1974159.8 mm (6.3 in)
1975113.8 mm (4.5 in)
1976153.9 mm (6.1 in)
1977119.9 mm (4.7 in)
1978151.9 mm (6.0 in)
197995.0 mm (3.7 in)
1980117.1 mm (4.6 in)
1981120.4 mm (4.7 in)
198279.8 mm (3.1 in)
1983116.8 mm (4.6 in)
1984110.0 mm (4.3 in)
1985119.9 mm (4.7 in)
198699.8 mm (3.9 in)
198776.5 mm (3.0 in)
1988240.3 mm (9.5 in)
198999.8 mm (3.9 in)
1990200.7 mm (7.9 in)
1991270.8 mm (10.7 in)
1992110.0 mm (4.3 in)
1993109.0 mm (4.3 in)
199487.9 mm (3.5 in)
1995122.9 mm (4.8 in)
1996117.1 mm (4.6 in)
1997180.3 mm (7.1 in)
1998110.0 mm (4.3 in)
1999228.9 mm (9.0 in)
2000172.0 mm (6.8 in)
2001132.3 mm (5.2 in)
2002142.5 mm (5.6 in)
2003108.2 mm (4.3 in)
2004141.5 mm (5.6 in)
2005134.4 mm (5.3 in)
200688.4 mm (3.5 in)
2007194.6 mm (7.7 in)
2008210.3 mm (8.3 in)
2009156.0 mm (6.1 in)
201098.3 mm (3.9 in)
201183.1 mm (3.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Altamira by year The wettest five days of the year at Altamira, 1961 to 2011. The record is 670.4 mm (26.4 in) in 1991, marked on the chart; the median year is 258.6 mm (10.2 in). 020040060080019701980199020002010Record: 670.4 mm (26.4 in) in 1991
The wettest five days of the year at Altamira, 1961 to 2011. The record is 670.4 mm (26.4 in) in 1991, marked on the chart; the median year is 258.6 mm (10.2 in).
Wettest five days (Rx5day) at Altamira by year
YearWettest five days (Rx5day)
1961319.8 mm (12.6 in)
1962187.0 mm (7.4 in)
1963265.9 mm (10.5 in)
1964273.7 mm (10.8 in)
1965257.8 mm (10.1 in)
1966452.2 mm (17.8 in)
1967454.7 mm (17.9 in)
1969264.4 mm (10.4 in)
1970419.5 mm (16.5 in)
1971213.6 mm (8.4 in)
1972317.0 mm (12.5 in)
1973330.0 mm (13.0 in)
1974441.0 mm (17.4 in)
1975288.1 mm (11.3 in)
1976554.5 mm (21.8 in)
1977216.7 mm (8.5 in)
1978321.6 mm (12.7 in)
1979224.8 mm (8.9 in)
1980273.3 mm (10.8 in)
1981241.0 mm (9.5 in)
1982112.9 mm (4.4 in)
1983268.3 mm (10.6 in)
1984307.5 mm (12.1 in)
1985246.9 mm (9.7 in)
1986167.7 mm (6.6 in)
1987194.4 mm (7.7 in)
1988409.0 mm (16.1 in)
1989165.3 mm (6.5 in)
1990255.6 mm (10.1 in)
1991670.4 mm (26.4 in)
1992220.7 mm (8.7 in)
1993152.4 mm (6.0 in)
1994190.5 mm (7.5 in)
1995169.3 mm (6.7 in)
1996234.1 mm (9.2 in)
1997358.2 mm (14.1 in)
1998219.2 mm (8.6 in)
1999356.7 mm (14.0 in)
2000226.7 mm (8.9 in)
2001310.9 mm (12.2 in)
2002258.6 mm (10.2 in)
2003208.7 mm (8.2 in)
2004151.1 mm (5.9 in)
2005258.6 mm (10.2 in)
2006170.5 mm (6.7 in)
2007622.7 mm (24.5 in)
2008637.7 mm (25.1 in)
2009170.2 mm (6.7 in)
2010366.5 mm (14.4 in)
2011216.7 mm (8.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Altamira by year The longest dry spell of the year at Altamira, 1961 to 2011. The record is 66 days in 2005, marked on the chart; the median year is 30 days. 02040608019701980199020002010Record: 66 days in 2005
The longest dry spell of the year at Altamira, 1961 to 2011. The record is 66 days in 2005, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Altamira by year
YearLongest dry spell (CDD)
196137 days
196249 days
196351 days
196441 days
196520 days
196623 days
196738 days
196925 days
197047 days
197146 days
197212 days
197327 days
197430 days
197536 days
197627 days
197722 days
197820 days
197930 days
198023 days
198130 days
198223 days
198325 days
198439 days
198520 days
198630 days
198738 days
198824 days
198945 days
199021 days
199136 days
199221 days
199325 days
199422 days
199529 days
199631 days
199729 days
199839 days
199942 days
200036 days
200124 days
200237 days
200335 days
200427 days
200566 days
200627 days
200724 days
200825 days
200930 days
201026 days
201131 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

45 years, 1961 to 2010

A day with at least 130.0 mm (5.1 in) of rain is expected about once in 2 years. A day with at least 323.5 mm (12.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Altamira: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years130.0 mm (5.1 in)
5 years170.2 mm (6.7 in)
10 years200.9 mm (7.9 in)
25 years245.1 mm (9.6 in)
50 years282.3 mm (11.1 in)Longer than the 45 years of record
100 years323.5 mm (12.7 in)Longer than the 45 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, 45 years of values from 1961 to 2010.

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: 270.8 mm (10.7 in) in 1991; 245.9 mm (9.7 in) in 1966; 240.3 mm (9.5 in) in 1988.

Download the Data

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