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San Martin Chalchicuautla Weather Records (MXN00024009)

Record envelope, standing records and threshold days for San Martin Chalchicuautla (MXN00024009), Mexico, with 50 years of record.

Key Facts for San Martin Chalchicuautla

  • San Martin Chalchicuautla (MXN00024009) is a weather station in Mexico at 21.37 latitude and -98.65 longitude, 212 m (695 ft) above sea level.
  • The station reports from 1961 to 2010, 50 years of record.
  • 1,464 records set at San Martin Chalchicuautla still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Martin Chalchicuautla tied a daily record high maximum temperature of 31.7 C (89.1 F) on 15 November 2010.

About the Station

  • Location: Mexico, 21.37 latitude, -98.65 longitude.
  • Elevation: 212 m (695 ft).
  • Period of record: 1961 to 2010, 50 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 San Martin Chalchicuautla, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Martin Chalchicuautla. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -1001020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Martin Chalchicuautla. 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 San Martin Chalchicuautla, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.0 C (95.0 F)0.0 C (32.0 F)n/an/a
Feb40.0 C (104.0 F)2.8 C (37.0 F)n/an/a
Mar41.7 C (107.1 F)0.6 C (33.1 F)n/an/a
Apr46.7 C (116.1 F)6.1 C (43.0 F)n/an/a
May47.2 C (117.0 F)10.0 C (50.0 F)n/an/a
Jun45.0 C (113.0 F)10.6 C (51.1 F)n/an/a
Jul40.0 C (104.0 F)11.7 C (53.1 F)n/an/a
Aug40.0 C (104.0 F)12.8 C (55.0 F)n/an/a
Sep41.7 C (107.1 F)5.0 C (41.0 F)n/an/a
Oct45.0 C (113.0 F)5.0 C (41.0 F)n/an/a
Nov40.0 C (104.0 F)3.9 C (39.0 F)n/an/a
Dec35.0 C (95.0 F)-2.2 C (28.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Martin Chalchicuautla by the year they were set 1,464 records at San Martin Chalchicuautla still stand. 1999 holds the most, with 155. 0501001502001961: 221962: 281963: 241964: 381965: 241966: 191967: 201968: 91969: 211970: 241971: 381972: 371973: 441974: 221975: 201976: 331977: 211978: 191979: 301980: 351981: 161982: 231983: 221984: 151985: 171986: 71987: 161988: 281989: 311990: 351991: 551992: 751993: 41994: 301995: 141996: 391997: 461998: 511999: 1552000: 82001: 72002: 892003: 32004: 382005: 172006: 222007: 92008: 172009: 352010: 121961196619711976198119861991199620012006
1,464 records at San Martin Chalchicuautla still stand. 1999 holds the most, with 155.
Standing records at San Martin Chalchicuautla by the year they were set
Year setStanding records
196122
196228
196324
196438
196524
196619
196720
19689
196921
197024
197138
197237
197344
197422
197520
197633
197721
197819
197930
198035
198116
198223
198322
198415
198517
19867
198716
198828
198931
199035
199155
199275
19934
199430
199514
199639
199746
199851
1999155
20008
20017
200289
20033
200438
200517
200622
20079
200817
200935
201012

All-Time Record Progression

1 new records
When San Martin Chalchicuautla set new all-time records 1 all-time records were set at San Martin Chalchicuautla between 17 June 1997 and 17 June 1997. Each dot is a new record. Record high minimum temperature17 June 1997: Record high minimum temperature 27.8 C (82.0 F)
1 all-time records were set at San Martin Chalchicuautla between 17 June 1997 and 17 June 1997. Each dot is a new record.
When San Martin Chalchicuautla set new all-time records
DateKindDetail
1997-06-17Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)

Wettest Day of Each Month

Jul: 285.0 mm (11.2 in)
Record daily precipitation for each month at San Martin Chalchicuautla The wettest day on record for each calendar month at San Martin Chalchicuautla. The most was 285.0 mm (11.2 in) on 4 July 1974. 0100200300 Jan: 128.3 mm (5.1 in), 30 January 1972 Jan Feb: 60.2 mm (2.4 in), 12 February 2008 Feb Mar: 51.3 mm (2.0 in), 3 March 1968 Mar Apr: 164.8 mm (6.5 in), 14 April 1964 Apr May: 170.9 mm (6.7 in), 18 May 1968 May Jun: 198.4 mm (7.8 in), 3 June 1967 Jun Jul: 285.0 mm (11.2 in), 4 July 1974 Jul Aug: 202.2 mm (8.0 in), 22 August 2007 Aug Sep: 191.8 mm (7.6 in), 21 September 1974 Sep Oct: 180.8 mm (7.1 in), 4 October 1990 Oct Nov: 156.0 mm (6.1 in), 29 November 1964 Nov Dec: 70.4 mm (2.8 in), 4 December 1981 Dec
The wettest day on record for each calendar month at San Martin Chalchicuautla. The most was 285.0 mm (11.2 in) on 4 July 1974.
Record daily precipitation for each month at San Martin Chalchicuautla
MonthRecord daily precipitation (mm)Date
Jan128.3 mm (5.1 in)30 January 1972
Feb60.2 mm (2.4 in)12 February 2008
Mar51.3 mm (2.0 in)3 March 1968
Apr164.8 mm (6.5 in)14 April 1964
May170.9 mm (6.7 in)18 May 1968
Jun198.4 mm (7.8 in)3 June 1967
Jul285.0 mm (11.2 in)4 July 1974
Aug202.2 mm (8.0 in)22 August 2007
Sep191.8 mm (7.6 in)21 September 1974
Oct180.8 mm (7.1 in)4 October 1990
Nov156.0 mm (6.1 in)29 November 1964
Dec70.4 mm (2.8 in)4 December 1981

Period of Record Coverage

1961 to 2010
Days with data per year at San Martin Chalchicuautla 50 years of record at San Martin Chalchicuautla, 1961 to 2010. 5 years have data for under 90 percent of days and are left out of rankings: 1969, 1993, 1995, 1997, 2003. 1961: 362 of 365 days1962: 360 of 365 days1963: 363 of 365 days1964: 330 of 366 days1965: 359 of 365 days1966: 359 of 365 days1967: 359 of 365 days1968: 333 of 366 days1969: 297 of 365 days1970: 360 of 365 days1971: 363 of 365 days1972: 361 of 366 days1973: 361 of 365 days1974: 363 of 365 days1975: 329 of 365 days1976: 359 of 366 days1977: 362 of 365 days1978: 357 of 365 days1979: 355 of 365 days1980: 357 of 366 days1981: 361 of 365 days1982: 360 of 365 days1983: 333 of 365 days1984: 330 of 366 days1985: 334 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 364 of 366 days1989: 362 of 365 days1990: 356 of 365 days1991: 356 of 365 days1992: 362 of 366 days1993: 30 of 365 days1994: 355 of 365 days1995: 151 of 365 days1996: 356 of 366 days1997: 325 of 365 days1998: 351 of 365 days1999: 360 of 365 days2000: 361 of 366 days2001: 332 of 365 days2002: 364 of 365 days2003: 302 of 365 days2004: 364 of 366 days2005: 363 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 364 of 365 days2010: 334 of 365 days19701980199020002010
50 years of record at San Martin Chalchicuautla, 1961 to 2010. 5 years have data for under 90 percent of days and are left out of rankings: 1969, 1993, 1995, 1997, 2003.
Days with data per year at San Martin Chalchicuautla
YearDays with dataShare of yearComplete
196136299%Yes
196236099%Yes
196336399%Yes
196433090%Yes
196535998%Yes
196635998%Yes
196735998%Yes
196833391%Yes
196929781%No
197036099%Yes
197136399%Yes
197236199%Yes
197336199%Yes
197436399%Yes
197532990%Yes
197635998%Yes
197736299%Yes
197835798%Yes
197935597%Yes
198035798%Yes
198136199%Yes
198236099%Yes
198333391%Yes
198433090%Yes
198533492%Yes
1986365100%Yes
1987365100%Yes
198836499%Yes
198936299%Yes
199035698%Yes
199135698%Yes
199236299%Yes
1993308%No
199435597%Yes
199515141%No
199635697%Yes
199732589%No
199835196%Yes
199936099%Yes
200036199%Yes
200133291%Yes
2002364100%Yes
200330283%No
200436499%Yes
200536399%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009364100%Yes
201033492%Yes

Latest Records

20
Latest records at San Martin Chalchicuautla
DateStationRecordValueBeat old record byOld record stoodSignificance
15 November 2010San Martin Chalchicuautla, MXdaily high max (Tie)31.7 C (89.1 F)tie21 years2 of 100 (Routine)
7 November 2010San Martin Chalchicuautla, MXdaily low min7.8 C (46.0 F)2.2 C (4.0 F)40 years23 of 100 (Routine)
6 November 2010San Martin Chalchicuautla, MXdaily low min5.6 C (42.1 F)2.7 C (4.9 F)40 years24 of 100 (Routine)
27 October 2010San Martin Chalchicuautla, MXdaily high max (Tie)33.9 C (93.0 F)tie21 years2 of 100 (Routine)
26 October 2010San Martin Chalchicuautla, MXdaily high max35.0 C (95.0 F)1.1 C (2.0 F)21 years14 of 100 (Routine)
25 October 2010San Martin Chalchicuautla, MXdaily high max (Tie)33.9 C (93.0 F)tie13 years2 of 100 (Routine)
18 September 2010San Martin Chalchicuautla, MXdaily rain60.5 mm (2.4 in)18.1 mm (0.7 in)16 years15 of 100 (Routine)
16 September 2010San Martin Chalchicuautla, MXdaily high max (Tie)35.6 C (96.1 F)tie0 years1 of 100 (Routine)
11 September 2010San Martin Chalchicuautla, MXdaily high min (Tie)23.9 C (75.0 F)tie1 year1 of 100 (Routine)
10 September 2010San Martin Chalchicuautla, MXmonthly high min (Tie)25.0 C (77.0 F)tie48 years7 of 100 (Routine)
8 September 2010San Martin Chalchicuautla, MXdaily high min (Tie)23.9 C (75.0 F)tie48 years4 of 100 (Routine)
3 September 2010San Martin Chalchicuautla, MXdaily high min (Tie)23.9 C (75.0 F)tie8 years1 of 100 (Routine)
31 August 2010San Martin Chalchicuautla, MXdaily high min (Tie)23.9 C (75.0 F)tie48 years4 of 100 (Routine)
26 August 2010San Martin Chalchicuautla, MXdaily high min (Tie)22.8 C (73.0 F)tie48 years4 of 100 (Routine)
11 August 2010San Martin Chalchicuautla, MXdaily high min (Tie)23.9 C (75.0 F)tie44 years4 of 100 (Routine)
9 August 2010San Martin Chalchicuautla, MXdaily high min (Tie)23.9 C (75.0 F)tie28 years3 of 100 (Routine)
28 July 2010San Martin Chalchicuautla, MXdaily rain100.1 mm (3.9 in)76.2 mm (3.0 in)23 years40 of 100 (Notable)
25 July 2010San Martin Chalchicuautla, MXdaily rain94.0 mm (3.7 in)6.9 mm (0.27 in)8 years9 of 100 (Routine)
25 July 2010San Martin Chalchicuautla, MXdaily low max (Tie)23.9 C (75.0 F)tie8 years1 of 100 (Routine)
24 July 2010San Martin Chalchicuautla, MXdaily rain200.7 mm (7.9 in)155.7 mm (6.1 in)37 years56 of 100 (Notable)

Climate Trend

34 complete years, 1961 to 2009
Annual mean temperature at San Martin Chalchicuautla as warming stripes, 1961 to 2009 One stripe for each of 34 complete years at San Martin Chalchicuautla, 1961 to 2009. Blue stripes are years cooler than the station's own mean of 23.3 C (74.0 F); red stripes are warmer. The coolest year was 2002, at 19.3 C (66.7 F), and the warmest was 1972, at 24.6 C (76.3 F). The strongest colour marks a difference of 4.1 C (7.4 F). 1961: 23.1 C, -0.3 C from the station mean1962: 23.8 C, +0.5 C from the station mean1963: 23.6 C, +0.2 C from the station mean1965: 23.7 C, +0.3 C from the station mean1966: 22.7 C, -0.7 C from the station mean1967: 23.6 C, +0.3 C from the station mean1970: 23.2 C, -0.2 C from the station mean1971: 24.6 C, +1.3 C from the station mean1972: 24.6 C, +1.3 C from the station mean1973: 24.4 C, +1.0 C from the station mean1974: 23.9 C, +0.5 C from the station mean1976: 23.1 C, -0.2 C from the station mean1977: 23.8 C, +0.4 C from the station mean1978: 23.5 C, +0.2 C from the station mean1979: 23.0 C, -0.4 C from the station mean1980: 23.9 C, +0.6 C from the station mean1981: 23.6 C, +0.2 C from the station mean1982: 24.1 C, +0.7 C from the station mean1986: 23.7 C, +0.3 C from the station mean1987: 23.0 C, -0.4 C from the station mean1988: 23.7 C, +0.3 C from the station mean1989: 23.7 C, +0.4 C from the station mean1990: 23.6 C, +0.3 C from the station mean1991: 23.5 C, +0.2 C from the station mean1992: 20.9 C, -2.4 C from the station mean1994: 22.8 C, -0.5 C from the station mean2000: 21.0 C, -2.3 C from the station mean2002: 19.3 C, -4.0 C from the station mean2004: 23.6 C, +0.2 C from the station mean2005: 23.5 C, +0.2 C from the station mean2006: 23.9 C, +0.6 C from the station mean2007: 23.3 C, 0.0 C from the station mean2008: 23.3 C, 0.0 C from the station mean2009: 24.4 C, +1.1 C from the station mean1961196519701975198019851990199520002005
One stripe for each of 34 complete years at San Martin Chalchicuautla, 1961 to 2009. Blue stripes are years cooler than the station's own mean of 23.3 C (74.0 F); red stripes are warmer. The coolest year was 2002, at 19.3 C (66.7 F), and the warmest was 1972, at 24.6 C (76.3 F). The strongest colour marks a difference of 4.1 C (7.4 F).
Annual mean temperature at San Martin Chalchicuautla as warming stripes, 1961 to 2009
YearAnnual mean temperatureDifference from the station mean
196123.1 C-0.26 C
196223.8 C+0.51 C
196323.6 C+0.23 C
196523.7 C+0.34 C
196622.7 C-0.67 C
196723.6 C+0.31 C
197023.2 C-0.15 C
197124.6 C+1.30 C
197224.6 C+1.30 C
197324.4 C+1.03 C
197423.9 C+0.54 C
197623.1 C-0.19 C
197723.8 C+0.45 C
197823.5 C+0.17 C
197923.0 C-0.38 C
198023.9 C+0.61 C
198123.6 C+0.25 C
198224.1 C+0.73 C
198623.7 C+0.35 C
198723.0 C-0.36 C
198823.7 C+0.34 C
198923.7 C+0.41 C
199023.6 C+0.26 C
199123.5 C+0.20 C
199220.9 C-2.40 C
199422.8 C-0.52 C
200021.0 C-2.30 C
200219.3 C-4.03 C
200423.6 C+0.25 C
200523.5 C+0.16 C
200623.9 C+0.57 C
200723.3 C-0.01 C
200823.3 C0.00 C
200924.4 C+1.11 C

The fitted trend in annual mean temperature here over 1961 to 2009 is -0.2 C (-0.4 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.3 F (-0.8 to 0.1) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Martin Chalchicuautla
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.2 C (-0.4 to 0.1) per decade-0.3 F (-0.8 to 0.1) per decade1961 to 200934Not clearly different from zero
Mean daily maximum-0.2 C (-0.6 to 0.1) per decade-0.4 F (-1.1 to 0.2) per decade1961 to 200934Not clearly different from zero
Mean daily minimum-0.15 C (-0.34 to 0.04) per decade-0.3 F (-0.6 to 0.1) per decade1961 to 200934Not 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 2010
Yearly extremes at San Martin Chalchicuautla: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)47.2 C (117.0 F)197338.9 C (102.0 F)50
Coldest night (TNn)-2.2 C (28.0 F)19895.0 C (41.0 F)50
Wettest day (Rx1day)285.0 mm (11.2 in)1974120.3 mm (4.7 in)50
Wettest five days (Rx5day)568.2 mm (22.4 in)1974218.7 mm (8.6 in)50
Longest dry spell (CDD)273 days197727 days50

Hottest day (TXx)

Hottest day (TXx) at San Martin Chalchicuautla by year The hottest day of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 47.2 C (117.0 F) in 1973, marked on the chart; the median year is 38.9 C (102.0 F). 25303540455019701980199020002010Record: 47.2 C (117.0 F) in 1973
The hottest day of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 47.2 C (117.0 F) in 1973, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at San Martin Chalchicuautla by year
YearHottest day (TXx)
196138.3 C (100.9 F)
196238.9 C (102.0 F)
196340.0 C (104.0 F)
196438.9 C (102.0 F)
196537.8 C (100.0 F)
196636.7 C (98.1 F)
196740.6 C (105.1 F)
196835.0 C (95.0 F)
196940.0 C (104.0 F)
197038.3 C (100.9 F)
197145.0 C (113.0 F)
197240.6 C (105.1 F)
197347.2 C (117.0 F)
197442.8 C (109.0 F)
197543.3 C (109.9 F)
197638.9 C (102.0 F)
197738.3 C (100.9 F)
197842.2 C (108.0 F)
197938.3 C (100.9 F)
198040.0 C (104.0 F)
198138.9 C (102.0 F)
198240.6 C (105.1 F)
198341.7 C (107.1 F)
198445.6 C (114.1 F)
198538.9 C (102.0 F)
198637.2 C (99.0 F)
198737.8 C (100.0 F)
198841.1 C (106.0 F)
198938.9 C (102.0 F)
199040.0 C (104.0 F)
199145.6 C (114.1 F)
199235.6 C (96.1 F)
199330.0 C (86.0 F)
199437.8 C (100.0 F)
199538.9 C (102.0 F)
199646.7 C (116.1 F)
199737.8 C (100.0 F)
199845.0 C (113.0 F)
199936.7 C (98.1 F)
200035.0 C (95.0 F)
200135.0 C (95.0 F)
200228.9 C (84.0 F)
200333.9 C (93.0 F)
200445.0 C (113.0 F)
200543.9 C (111.0 F)
200642.8 C (109.0 F)
200738.9 C (102.0 F)
200841.7 C (107.1 F)
200941.7 C (107.1 F)
201040.0 C (104.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Martin Chalchicuautla by year The coldest night of the year at San Martin Chalchicuautla, 1961 to 2010. The record is -2.2 C (28.0 F) in 1989, marked on the chart; the median year is 5.0 C (41.0 F). -505101519701980199020002010Record: -2.2 C (28.0 F) in 1989
The coldest night of the year at San Martin Chalchicuautla, 1961 to 2010. The record is -2.2 C (28.0 F) in 1989, marked on the chart; the median year is 5.0 C (41.0 F).
Coldest night (TNn) at San Martin Chalchicuautla by year
YearColdest night (TNn)
19616.1 C (43.0 F)
19620.0 C (32.0 F)
19631.1 C (34.0 F)
19643.9 C (39.0 F)
19655.0 C (41.0 F)
19664.4 C (39.9 F)
19673.9 C (39.0 F)
19685.0 C (41.0 F)
19694.4 C (39.9 F)
19702.8 C (37.0 F)
19716.1 C (43.0 F)
19726.1 C (43.0 F)
19732.8 C (37.0 F)
19745.0 C (41.0 F)
19751.7 C (35.1 F)
19763.9 C (39.0 F)
19775.0 C (41.0 F)
19786.7 C (44.1 F)
19791.7 C (35.1 F)
19806.7 C (44.1 F)
19817.8 C (46.0 F)
19823.9 C (39.0 F)
19838.3 C (46.9 F)
19845.6 C (42.1 F)
19852.8 C (37.0 F)
19865.0 C (41.0 F)
19875.0 C (41.0 F)
19885.6 C (42.1 F)
1989-2.2 C (28.0 F)
19905.6 C (42.1 F)
19917.2 C (45.0 F)
19925.6 C (42.1 F)
19937.8 C (46.0 F)
19946.7 C (44.1 F)
199511.7 C (53.1 F)
19965.6 C (42.1 F)
19973.9 C (39.0 F)
19986.7 C (44.1 F)
19993.9 C (39.0 F)
20003.9 C (39.0 F)
20015.6 C (42.1 F)
20023.9 C (39.0 F)
20037.8 C (46.0 F)
20042.8 C (37.0 F)
20056.7 C (44.1 F)
20063.9 C (39.0 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)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Martin Chalchicuautla by year The wettest day of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 285.0 mm (11.2 in) in 1974, marked on the chart; the median year is 120.3 mm (4.7 in). 010020030019701980199020002010Record: 285.0 mm (11.2 in) in 1974
The wettest day of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 285.0 mm (11.2 in) in 1974, marked on the chart; the median year is 120.3 mm (4.7 in).
Wettest day (Rx1day) at San Martin Chalchicuautla by year
YearWettest day (Rx1day)
1961114.8 mm (4.5 in)
1962114.8 mm (4.5 in)
1963137.9 mm (5.4 in)
1964164.8 mm (6.5 in)
1965118.4 mm (4.7 in)
1966159.8 mm (6.3 in)
1967198.4 mm (7.8 in)
1968170.9 mm (6.7 in)
1969140.0 mm (5.5 in)
1970175.8 mm (6.9 in)
197183.8 mm (3.3 in)
1972179.8 mm (7.1 in)
1973111.8 mm (4.4 in)
1974285.0 mm (11.2 in)
1975152.1 mm (6.0 in)
1976135.9 mm (5.4 in)
1977179.8 mm (7.1 in)
1978127.8 mm (5.0 in)
197995.0 mm (3.7 in)
198082.8 mm (3.3 in)
1981154.9 mm (6.1 in)
198266.3 mm (2.6 in)
198388.4 mm (3.5 in)
1984142.0 mm (5.6 in)
1985142.7 mm (5.6 in)
198665.3 mm (2.6 in)
1987166.9 mm (6.6 in)
1988130.8 mm (5.1 in)
198978.5 mm (3.1 in)
1990180.8 mm (7.1 in)
1991119.9 mm (4.7 in)
1992151.9 mm (6.0 in)
19938.9 mm (0.35 in)
199498.6 mm (3.9 in)
199580.3 mm (3.2 in)
199674.9 mm (2.9 in)
199731.8 mm (1.3 in)
199875.9 mm (3.0 in)
1999121.9 mm (4.8 in)
200094.2 mm (3.7 in)
200195.3 mm (3.8 in)
200248.5 mm (1.9 in)
200369.9 mm (2.8 in)
200487.4 mm (3.4 in)
2005119.9 mm (4.7 in)
2006100.1 mm (3.9 in)
2007202.2 mm (8.0 in)
2008120.7 mm (4.8 in)
2009140.0 mm (5.5 in)
2010200.7 mm (7.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Martin Chalchicuautla by year The wettest five days of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 568.2 mm (22.4 in) in 1974, marked on the chart; the median year is 218.7 mm (8.6 in). 020040060019701980199020002010Record: 568.2 mm (22.4 in) in 1974
The wettest five days of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 568.2 mm (22.4 in) in 1974, marked on the chart; the median year is 218.7 mm (8.6 in).
Wettest five days (Rx5day) at San Martin Chalchicuautla by year
YearWettest five days (Rx5day)
1961208.5 mm (8.2 in)
1962175.6 mm (6.9 in)
1963231.8 mm (9.1 in)
1964219.8 mm (8.7 in)
1965267.0 mm (10.5 in)
1966323.7 mm (12.7 in)
1967344.7 mm (13.6 in)
1968226.0 mm (8.9 in)
1969237.3 mm (9.3 in)
1970447.1 mm (17.6 in)
1971136.0 mm (5.4 in)
1972250.4 mm (9.9 in)
1973268.9 mm (10.6 in)
1974568.2 mm (22.4 in)
1975444.2 mm (17.5 in)
1976263.4 mm (10.4 in)
1977256.8 mm (10.1 in)
1978336.8 mm (13.3 in)
1979144.3 mm (5.7 in)
1980209.6 mm (8.3 in)
1981317.7 mm (12.5 in)
1982154.5 mm (6.1 in)
1983174.5 mm (6.9 in)
1984381.3 mm (15.0 in)
1985319.3 mm (12.6 in)
1986127.5 mm (5.0 in)
1987188.8 mm (7.4 in)
1988213.4 mm (8.4 in)
1989142.2 mm (5.6 in)
1990279.6 mm (11.0 in)
1991217.6 mm (8.6 in)
1992245.3 mm (9.7 in)
199316.8 mm (0.7 in)
1994210.9 mm (8.3 in)
1995173.8 mm (6.8 in)
1996138.8 mm (5.5 in)
199752.6 mm (2.1 in)
1998151.6 mm (6.0 in)
1999199.7 mm (7.9 in)
2000116.6 mm (4.6 in)
2001195.9 mm (7.7 in)
2002171.5 mm (6.8 in)
200392.2 mm (3.6 in)
2004140.8 mm (5.5 in)
2005380.2 mm (15.0 in)
2006104.9 mm (4.1 in)
2007361.7 mm (14.2 in)
2008343.7 mm (13.5 in)
2009244.7 mm (9.6 in)
2010565.4 mm (22.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Martin Chalchicuautla by year The longest dry spell of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 273 days in 1977, marked on the chart; the median year is 27 days. 010020030019701980199020002010Record: 273 days in 1977
The longest dry spell of the year at San Martin Chalchicuautla, 1961 to 2010. The record is 273 days in 1977, marked on the chart; the median year is 27 days.
Longest dry spell (CDD) at San Martin Chalchicuautla by year
YearLongest dry spell (CDD)
196132 days
196227 days
196351 days
196426 days
196520 days
196637 days
196738 days
196820 days
196920 days
197037 days
197134 days
197220 days
197326 days
197416 days
197528 days
197627 days
1977273 days
197815 days
197929 days
198023 days
198130 days
198231 days
198345 days
198439 days
198521 days
198636 days
198731 days
198841 days
198925 days
199034 days
199125 days
199223 days
19939 days
199420 days
199511 days
199626 days
199727 days
199827 days
199926 days
200019 days
200132 days
200225 days
200323 days
200436 days
200537 days
200629 days
200723 days
200837 days
200926 days
201026 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

46 years, 1961 to 2010

A day with at least 124.0 mm (4.9 in) of rain is expected about once in 2 years. A day with at least 253.9 mm (10.0 in) of rain is expected about once in 100 years.

Rainfall return levels at San Martin Chalchicuautla: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years124.0 mm (4.9 in)
5 years167.2 mm (6.6 in)
10 years192.1 mm (7.6 in)
25 years219.7 mm (8.6 in)
50 years237.8 mm (9.4 in)Longer than the 46 years of record
100 years253.9 mm (10.0 in)Longer than the 46 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, 46 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: 285.0 mm (11.2 in) in 1974; 202.2 mm (8.0 in) in 2007; 200.7 mm (7.9 in) in 2010.

Download the Data

  • Data for San Martin Chalchicuautla standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Martin Chalchicuautla 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

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