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Calpulalpan Weather Records (MXN00029035)

Record envelope, standing records and threshold days for Calpulalpan (MXN00029035), Mexico, with 64 years of record.

Key Facts for Calpulalpan

  • Calpulalpan (MXN00029035) is a weather station in Mexico at 19.58 latitude and -98.55 longitude, 2,587 m (8,487 ft) above sea level.
  • The station reports from 1947 to 2010, 64 years of record.
  • 1,464 records set at Calpulalpan still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • Calpulalpan set a daily record precipitation of 7.4 mm (0.29 in) on 15 January 2010.

About the Station

  • Location: Mexico, 19.58 latitude, -98.55 longitude.
  • Elevation: 2,587 m (8,487 ft).
  • Period of record: 1947 to 2010, 64 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Calpulalpan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Calpulalpan. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Calpulalpan. 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 Calpulalpan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.0 C (95.0 F)-12.8 C (9.0 F)n/an/a
Feb37.2 C (99.0 F)-10.6 C (12.9 F)n/an/a
Mar37.8 C (100.0 F)-8.9 C (16.0 F)n/an/a
Apr40.0 C (104.0 F)-5.6 C (21.9 F)n/an/a
May38.9 C (102.0 F)-2.8 C (27.0 F)n/an/a
Jun35.0 C (95.0 F)-3.3 C (26.1 F)n/an/a
Jul36.1 C (97.0 F)-3.9 C (25.0 F)n/an/a
Aug37.2 C (99.0 F)-2.8 C (27.0 F)n/an/a
Sep36.1 C (97.0 F)-5.0 C (23.0 F)n/an/a
Oct35.0 C (95.0 F)-9.4 C (15.1 F)n/an/a
Nov34.4 C (93.9 F)-10.6 C (12.9 F)n/an/a
Dec34.4 C (93.9 F)-8.9 C (16.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Calpulalpan by the year they were set 1,464 records at Calpulalpan still stand. 2008 holds the most, with 219. 01002003001974: 441975: 571976: 341977: 141978: 381979: 311980: 471981: 441982: 271983: 771984: 351993: 161994: 301995: 471996: 241997: 221998: 291999: 252000: 72001: 282002: 182003: 202004: 242005: 1352006: 1392007: 1352008: 2192009: 981974197719801983199419972000200320062009
1,464 records at Calpulalpan still stand. 2008 holds the most, with 219.
Standing records at Calpulalpan by the year they were set
Year setStanding records
197444
197557
197634
197714
197838
197931
198047
198144
198227
198377
198435
199316
199430
199547
199624
199722
199829
199925
20007
200128
200218
200320
200424
2005135
2006139
2007135
2008219
200998

All-Time Record Progression

1 new records
When Calpulalpan set new all-time records 1 all-time records were set at Calpulalpan between 25 January 1980 and 25 January 1980. Each dot is a new record. Record daily precipitation25 January 1980: Record daily precipitation 79.0 mm (3.1 in)1980
1 all-time records were set at Calpulalpan between 25 January 1980 and 25 January 1980. Each dot is a new record.
When Calpulalpan set new all-time records
DateKindDetail
1980-01-25Record daily precipitationRecord daily precipitation 79.0 mm (3.1 in)

Wettest Day of Each Month

Jan: 79.0 mm (3.1 in)
Record daily precipitation for each month at Calpulalpan The wettest day on record for each calendar month at Calpulalpan. The most was 79.0 mm (3.1 in) on 25 January 1980. 020406080 Jan: 79.0 mm (3.1 in), 25 January 1980 Jan Feb: 64.8 mm (2.6 in), 2 February 1993 Feb Mar: 25.9 mm (1.0 in), 22 March 1963 Mar Apr: 36.3 mm (1.4 in), 19 April 1990 Apr May: 56.9 mm (2.2 in), 14 May 1959 May Jun: 61.0 mm (2.4 in), 20 June 1977 Jun Jul: 54.1 mm (2.1 in), 14 July 1997 Jul Aug: 47.8 mm (1.9 in), 24 August 2006 Aug Sep: 63.5 mm (2.5 in), 21 September 1993 Sep Oct: 39.9 mm (1.6 in), 19 October 1956 Oct Nov: 59.9 mm (2.4 in), 23 November 1979 Nov Dec: 25.7 mm (1.0 in), 30 December 1995 Dec
The wettest day on record for each calendar month at Calpulalpan. The most was 79.0 mm (3.1 in) on 25 January 1980.
Record daily precipitation for each month at Calpulalpan
MonthRecord daily precipitation (mm)Date
Jan79.0 mm (3.1 in)25 January 1980
Feb64.8 mm (2.6 in)2 February 1993
Mar25.9 mm (1.0 in)22 March 1963
Apr36.3 mm (1.4 in)19 April 1990
May56.9 mm (2.2 in)14 May 1959
Jun61.0 mm (2.4 in)20 June 1977
Jul54.1 mm (2.1 in)14 July 1997
Aug47.8 mm (1.9 in)24 August 2006
Sep63.5 mm (2.5 in)21 September 1993
Oct39.9 mm (1.6 in)19 October 1956
Nov59.9 mm (2.4 in)23 November 1979
Dec25.7 mm (1.0 in)30 December 1995

Period of Record Coverage

1974 to 2010
Days with data per year at Calpulalpan 30 years of record at Calpulalpan, 1974 to 2010. 11 years have data for under 90 percent of days and are left out of rankings: 1974, 1980, 1981, 1982, 1984, 1992, 1993, 2006 and others. 1974: 175 of 365 days1975: 363 of 365 days1976: 360 of 366 days1977: 334 of 365 days1978: 356 of 365 days1979: 361 of 365 days1980: 244 of 366 days1981: 212 of 365 days1982: 244 of 365 days1983: 334 of 365 days1984: 274 of 366 days1992: 11 of 366 days1993: 237 of 365 days1994: 358 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 362 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 228 of 365 days2007: 237 of 365 days2008: 366 of 366 days2009: 300 of 365 days2010: 31 of 365 days197519801995200020052010
30 years of record at Calpulalpan, 1974 to 2010. 11 years have data for under 90 percent of days and are left out of rankings: 1974, 1980, 1981, 1982, 1984, 1992, 1993, 2006 and others.
Days with data per year at Calpulalpan
YearDays with dataShare of yearComplete
197417548%No
197536399%Yes
197636098%Yes
197733492%Yes
197835698%Yes
197936199%Yes
198024467%No
198121258%No
198224467%No
198333492%Yes
198427475%No
1992113%No
199323765%No
199435898%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
199836299%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
200622862%No
200723765%No
2008366100%Yes
200930082%No
2010318%No

Latest Records

20
Latest records at Calpulalpan
DateStationRecordValueBeat old record byOld record stoodSignificance
15 January 2010Calpulalpan, MXdaily rain7.4 mm (0.29 in)3.6 mm (0.14 in)0 years8 of 100 (Routine)
13 January 2010Calpulalpan, MXdaily rain4.8 mm (0.19 in)1.0 mm (0.04 in)8 years8 of 100 (Routine)
9 January 2010Calpulalpan, MXdaily rain5.8 mm (0.23 in)4.0 mm (0.16 in)32 years18 of 100 (Routine)
8 January 2010Calpulalpan, MXdaily rain3.8 mm (0.15 in)2.5 mm (0.10 in)26 years15 of 100 (Routine)
2 January 2010Calpulalpan, MXdaily rain1.8 mm (0.07 in)1.8 mm (0.07 in)62 years20 of 100 (Routine)
30 October 2009Calpulalpan, MXdaily rain27.9 mm (1.1 in)14.9 mm (0.6 in)7 years27 of 100 (Routine)
24 October 2009Calpulalpan, MXdaily rain19.8 mm (0.8 in)0.7 mm (0.03 in)18 years11 of 100 (Routine)
24 March 2009Calpulalpan, MXdaily rain7.9 mm (0.31 in)3.8 mm (0.15 in)16 years18 of 100 (Routine)
12 March 2009Calpulalpan, MXdaily rain23.4 mm (0.9 in)13.7 mm (0.5 in)28 years20 of 100 (Routine)
15 January 2009Calpulalpan, MXdaily rain3.8 mm (0.15 in)2.0 mm (0.08 in)17 years12 of 100 (Routine)
4 July 2008Calpulalpan, MXdaily rain46.0 mm (1.8 in)24.7 mm (1.0 in)33 years46 of 100 (Notable)
12 April 2008Calpulalpan, MXdaily rain10.4 mm (0.4 in)5.1 mm (0.20 in)51 years20 of 100 (Routine)
10 February 2008Calpulalpan, MXdaily rain (Tie)7.9 mm (0.31 in)tie28 years3 of 100 (Routine)
9 February 2008Calpulalpan, MXdaily rain10.2 mm (0.4 in)6.6 mm (0.26 in)24 years20 of 100 (Routine)
17 October 2007Calpulalpan, MXdaily rain13.5 mm (0.5 in)8.7 mm (0.34 in)50 years20 of 100 (Routine)
27 September 2007Calpulalpan, MXdaily rain19.8 mm (0.8 in)1.5 mm (0.06 in)2 years7 of 100 (Routine)
28 April 2007Calpulalpan, MXdaily rain19.8 mm (0.8 in)12.9 mm (0.5 in)52 years20 of 100 (Routine)
1 April 2007Calpulalpan, MXdaily rain6.9 mm (0.27 in)2.1 mm (0.08 in)12 years12 of 100 (Routine)
28 March 2007Calpulalpan, MXdaily rain15.7 mm (0.6 in)11.9 mm (0.5 in)49 years20 of 100 (Routine)
27 March 2007Calpulalpan, MXdaily rain3.8 mm (0.15 in)1.5 mm (0.06 in)16 years13 of 100 (Routine)

Climate Trend

17 complete years, 1975 to 2008
Annual mean temperature at Calpulalpan as warming stripes, 1975 to 2008 One stripe for each of 17 complete years at Calpulalpan, 1975 to 2008. Blue stripes are years cooler than the station's own mean of 13.5 C (56.3 F); red stripes are warmer. The coolest year was 2001, at 12.5 C (54.6 F), and the warmest was 1995, at 14.9 C (58.9 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1975: 12.7 C, -0.8 C from the station mean1976: 13.2 C, -0.3 C from the station mean1978: 13.1 C, -0.3 C from the station mean1979: 13.0 C, -0.5 C from the station mean1994: 14.8 C, +1.3 C from the station mean1995: 14.9 C, +1.5 C from the station mean1996: 14.3 C, +0.8 C from the station mean1997: 13.5 C, 0.0 C from the station mean1998: 13.8 C, +0.3 C from the station mean1999: 12.6 C, -0.9 C from the station mean2000: 12.9 C, -0.6 C from the station mean2001: 12.5 C, -0.9 C from the station mean2002: 13.0 C, -0.5 C from the station mean2003: 13.1 C, -0.3 C from the station mean2004: 12.7 C, -0.8 C from the station mean2005: 14.2 C, +0.7 C from the station mean2008: 14.8 C, +1.4 C from the station mean1975198019851990199520002005
One stripe for each of 17 complete years at Calpulalpan, 1975 to 2008. Blue stripes are years cooler than the station's own mean of 13.5 C (56.3 F); red stripes are warmer. The coolest year was 2001, at 12.5 C (54.6 F), and the warmest was 1995, at 14.9 C (58.9 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Calpulalpan as warming stripes, 1975 to 2008
YearAnnual mean temperatureDifference from the station mean
197512.7 C-0.77 C
197613.2 C-0.28 C
197813.1 C-0.35 C
197913.0 C-0.49 C
199414.8 C+1.31 C
199514.9 C+1.46 C
199614.3 C+0.78 C
199713.5 C+0.03 C
199813.8 C+0.32 C
199912.6 C-0.93 C
200012.9 C-0.57 C
200112.5 C-0.94 C
200213.0 C-0.50 C
200313.1 C-0.34 C
200412.7 C-0.82 C
200514.2 C+0.73 C
200814.8 C+1.35 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1947 to 2010
Yearly extremes at Calpulalpan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.0 C (104.0 F)200930.0 C (86.0 F)30
Coldest night (TNn)-12.8 C (9.0 F)2006-5.0 C (23.0 F)30
Wettest day (Rx1day)79.0 mm (3.1 in)198038.9 mm (1.5 in)60
Wettest five days (Rx5day)220.4 mm (8.7 in)198077.3 mm (3.0 in)60
Longest dry spell (CDD)120 days195155 days60

Hottest day (TXx)

Hottest day (TXx) at Calpulalpan by year The hottest day of the year at Calpulalpan, 1947 to 2010. The record is 40.0 C (104.0 F) in 2009, marked on the chart; the median year is 30.0 C (86.0 F). 2025303540196019802000Record: 40.0 C (104.0 F) in 2009
The hottest day of the year at Calpulalpan, 1947 to 2010. The record is 40.0 C (104.0 F) in 2009, marked on the chart; the median year is 30.0 C (86.0 F).
Hottest day (TXx) at Calpulalpan by year
YearHottest day (TXx)
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
197430.6 C (87.1 F)
197530.0 C (86.0 F)
197628.3 C (82.9 F)
197730.6 C (87.1 F)
197830.6 C (87.1 F)
197930.0 C (86.0 F)
198027.8 C (82.0 F)
198127.8 C (82.0 F)
198228.9 C (84.0 F)
198332.8 C (91.0 F)
198430.6 C (87.1 F)
1989n/a
1990n/a
1991n/a
199223.9 C (75.0 F)
199328.9 C (84.0 F)
199428.9 C (84.0 F)
199530.6 C (87.1 F)
199628.9 C (84.0 F)
199728.9 C (84.0 F)
199832.8 C (91.0 F)
199930.6 C (87.1 F)
200028.9 C (84.0 F)
200128.9 C (84.0 F)
200230.0 C (86.0 F)
200330.0 C (86.0 F)
200426.7 C (80.1 F)
200537.2 C (99.0 F)
200638.9 C (102.0 F)
200737.2 C (99.0 F)
200838.9 C (102.0 F)
200940.0 C (104.0 F)
201027.8 C (82.0 F)

Coldest night (TNn)

Coldest night (TNn) at Calpulalpan by year The coldest night of the year at Calpulalpan, 1947 to 2010. The record is -12.8 C (9.0 F) in 2006, marked on the chart; the median year is -5.0 C (23.0 F). -15-10-505196019802000Record: -12.8 C (9.0 F) in 2006
The coldest night of the year at Calpulalpan, 1947 to 2010. The record is -12.8 C (9.0 F) in 2006, marked on the chart; the median year is -5.0 C (23.0 F).
Coldest night (TNn) at Calpulalpan by year
YearColdest night (TNn)
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974-3.3 C (26.1 F)
1975-5.0 C (23.0 F)
1976-6.7 C (19.9 F)
1977-1.1 C (30.0 F)
1978-1.7 C (28.9 F)
1979-5.0 C (23.0 F)
1980-6.1 C (21.0 F)
1981-2.2 C (28.0 F)
1982-2.2 C (28.0 F)
1983-2.2 C (28.0 F)
1984-1.1 C (30.0 F)
1989n/a
1990n/a
1991n/a
19921.7 C (35.1 F)
1993-2.2 C (28.0 F)
1994-2.2 C (28.0 F)
19950.0 C (32.0 F)
1996-2.2 C (28.0 F)
1997-6.1 C (21.0 F)
1998-5.6 C (21.9 F)
1999-7.8 C (18.0 F)
2000-7.2 C (19.0 F)
2001-4.4 C (24.1 F)
2002-7.2 C (19.0 F)
2003-7.2 C (19.0 F)
2004-8.3 C (17.1 F)
2005-8.3 C (17.1 F)
2006-12.8 C (9.0 F)
2007-9.4 C (15.1 F)
2008-11.1 C (12.0 F)
2009-10.6 C (12.9 F)
20100.0 C (32.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Calpulalpan by year The wettest day of the year at Calpulalpan, 1947 to 2010. The record is 79.0 mm (3.1 in) in 1980, marked on the chart; the median year is 38.9 mm (1.5 in). 020406080196019802000Record: 79.0 mm (3.1 in) in 1980
The wettest day of the year at Calpulalpan, 1947 to 2010. The record is 79.0 mm (3.1 in) in 1980, marked on the chart; the median year is 38.9 mm (1.5 in).
Wettest day (Rx1day) at Calpulalpan by year
YearWettest day (Rx1day)
194726.4 mm (1.0 in)
194827.9 mm (1.1 in)
194939.4 mm (1.6 in)
195035.8 mm (1.4 in)
195122.9 mm (0.9 in)
195246.5 mm (1.8 in)
195334.8 mm (1.4 in)
195428.4 mm (1.1 in)
195538.9 mm (1.5 in)
195647.0 mm (1.9 in)
195734.8 mm (1.4 in)
195849.8 mm (2.0 in)
195956.9 mm (2.2 in)
196037.3 mm (1.5 in)
196136.8 mm (1.4 in)
196239.9 mm (1.6 in)
196332.8 mm (1.3 in)
196438.9 mm (1.5 in)
196541.9 mm (1.6 in)
196647.0 mm (1.9 in)
196753.8 mm (2.1 in)
196831.0 mm (1.2 in)
196941.9 mm (1.6 in)
197034.8 mm (1.4 in)
197130.0 mm (1.2 in)
197236.8 mm (1.4 in)
197337.8 mm (1.5 in)
197440.4 mm (1.6 in)
197556.4 mm (2.2 in)
197636.8 mm (1.4 in)
197761.0 mm (2.4 in)
197853.3 mm (2.1 in)
197959.9 mm (2.4 in)
198079.0 mm (3.1 in)
198148.0 mm (1.9 in)
198234.8 mm (1.4 in)
198335.1 mm (1.4 in)
198434.5 mm (1.4 in)
198939.6 mm (1.6 in)
199036.3 mm (1.4 in)
199152.8 mm (2.1 in)
199242.2 mm (1.7 in)
199364.8 mm (2.6 in)
199437.8 mm (1.5 in)
199525.7 mm (1.0 in)
199636.3 mm (1.4 in)
199754.1 mm (2.1 in)
199847.5 mm (1.9 in)
199939.9 mm (1.6 in)
200032.0 mm (1.3 in)
200135.6 mm (1.4 in)
200239.6 mm (1.6 in)
200332.3 mm (1.3 in)
200441.7 mm (1.6 in)
200533.8 mm (1.3 in)
200647.8 mm (1.9 in)
200736.8 mm (1.4 in)
200846.0 mm (1.8 in)
200939.9 mm (1.6 in)
20107.4 mm (0.29 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Calpulalpan by year The wettest five days of the year at Calpulalpan, 1947 to 2010. The record is 220.4 mm (8.7 in) in 1980, marked on the chart; the median year is 77.3 mm (3.0 in). 0100200300196019802000Record: 220.4 mm (8.7 in) in 1980
The wettest five days of the year at Calpulalpan, 1947 to 2010. The record is 220.4 mm (8.7 in) in 1980, marked on the chart; the median year is 77.3 mm (3.0 in).
Wettest five days (Rx5day) at Calpulalpan by year
YearWettest five days (Rx5day)
194745.7 mm (1.8 in)
194890.5 mm (3.6 in)
194953.2 mm (2.1 in)
195057.4 mm (2.3 in)
195145.5 mm (1.8 in)
195263.5 mm (2.5 in)
195358.7 mm (2.3 in)
195481.5 mm (3.2 in)
1955107.3 mm (4.2 in)
1956104.5 mm (4.1 in)
195771.7 mm (2.8 in)
1958105.9 mm (4.2 in)
195982.6 mm (3.3 in)
1960124.7 mm (4.9 in)
196180.3 mm (3.2 in)
196279.3 mm (3.1 in)
196358.7 mm (2.3 in)
196467.3 mm (2.6 in)
196564.0 mm (2.5 in)
196685.6 mm (3.4 in)
196763.8 mm (2.5 in)
196853.1 mm (2.1 in)
1969101.9 mm (4.0 in)
197097.3 mm (3.8 in)
197161.7 mm (2.4 in)
197270.4 mm (2.8 in)
197373.5 mm (2.9 in)
1974101.9 mm (4.0 in)
197590.2 mm (3.6 in)
197675.2 mm (3.0 in)
1977106.2 mm (4.2 in)
1978186.4 mm (7.3 in)
1979113.7 mm (4.5 in)
1980220.4 mm (8.7 in)
198198.0 mm (3.9 in)
198244.2 mm (1.7 in)
198388.5 mm (3.5 in)
198495.1 mm (3.7 in)
198949.8 mm (2.0 in)
199050.0 mm (2.0 in)
199195.9 mm (3.8 in)
199266.9 mm (2.6 in)
1993102.4 mm (4.0 in)
1994112.1 mm (4.4 in)
199564.6 mm (2.5 in)
199653.4 mm (2.1 in)
199772.6 mm (2.9 in)
199882.1 mm (3.2 in)
199995.1 mm (3.7 in)
200068.4 mm (2.7 in)
200151.3 mm (2.0 in)
200256.9 mm (2.2 in)
200384.9 mm (3.3 in)
200460.7 mm (2.4 in)
200595.7 mm (3.8 in)
200675.0 mm (3.0 in)
200763.5 mm (2.5 in)
2008100.1 mm (3.9 in)
200981.3 mm (3.2 in)
201014.4 mm (0.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Calpulalpan by year The longest dry spell of the year at Calpulalpan, 1947 to 2010. The record is 120 days in 1951, marked on the chart; the median year is 55 days. 050100150196019802000Record: 120 days in 1951
The longest dry spell of the year at Calpulalpan, 1947 to 2010. The record is 120 days in 1951, marked on the chart; the median year is 55 days.
Longest dry spell (CDD) at Calpulalpan by year
YearLongest dry spell (CDD)
194718 days
194864 days
1949112 days
195071 days
1951120 days
195245 days
195370 days
195455 days
195549 days
195690 days
195746 days
195854 days
195974 days
196065 days
196162 days
196255 days
196360 days
196458 days
196550 days
196649 days
196764 days
196846 days
196938 days
197078 days
197176 days
197270 days
197357 days
197448 days
197564 days
197680 days
197779 days
197843 days
197926 days
198037 days
198126 days
198231 days
198355 days
198432 days
198923 days
199035 days
199146 days
199228 days
199356 days
199457 days
199530 days
199657 days
199769 days
199873 days
199977 days
200064 days
200172 days
200246 days
200332 days
200479 days
200542 days
200655 days
200731 days
200875 days
200955 days
201013 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, 1948 to 2008

A day with at least 39.2 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 68.5 mm (2.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Calpulalpan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years39.2 mm (1.5 in)
5 years47.5 mm (1.9 in)
10 years52.8 mm (2.1 in)
25 years59.3 mm (2.3 in)
50 years64.0 mm (2.5 in)Longer than the 46 years of record
100 years68.5 mm (2.7 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 1948 to 2008.

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: 61.0 mm (2.4 in) in 1977; 59.9 mm (2.4 in) in 1979; 56.9 mm (2.2 in) in 1959.

Download the Data

  • Data for Calpulalpan standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Calpulalpan 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

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