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Chichihualco Weather Records (MXN00012031)

Record envelope, standing records and threshold days for Chichihualco (MXN00012031), Mexico, with 52 years of record.

Key Facts for Chichihualco

  • Chichihualco (MXN00012031) is a weather station in Mexico at 17.67 latitude and -99.70 longitude, 1,140 m (3,740 ft) above sea level.
  • The station reports from 1961 to 2012, 52 years of record.
  • 1,464 records set at Chichihualco still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Chichihualco tied a daily record low maximum temperature of 25.0 C (77.0 F) on 19 September 2012.

About the Station

  • Location: Mexico, 17.67 latitude, -99.70 longitude.
  • Elevation: 1,140 m (3,740 ft).
  • Period of record: 1961 to 2012, 52 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 Chichihualco, with 2026 drawn through them The band shows the record high and record low for each calendar day at Chichihualco. 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 Chichihualco. 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 Chichihualco, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan40.0 C (104.0 F)5.0 C (41.0 F)n/an/a
Feb40.6 C (105.1 F)6.7 C (44.1 F)n/an/a
Mar45.0 C (113.0 F)8.9 C (48.0 F)n/an/a
Apr44.4 C (111.9 F)10.6 C (51.1 F)n/an/a
May45.0 C (113.0 F)8.9 C (48.0 F)n/an/a
Jun43.9 C (111.0 F)8.9 C (48.0 F)n/an/a
Jul42.8 C (109.0 F)10.0 C (50.0 F)n/an/a
Aug40.6 C (105.1 F)10.6 C (51.1 F)n/an/a
Sep40.6 C (105.1 F)10.0 C (50.0 F)n/an/a
Oct41.7 C (107.1 F)8.9 C (48.0 F)n/an/a
Nov41.7 C (107.1 F)7.8 C (46.0 F)n/an/a
Dec41.7 C (107.1 F)5.6 C (42.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Chichihualco by the year they were set 1,464 records at Chichihualco still stand. 1992 holds the most, with 299. 01002003001961: 871962: 821963: 851964: 661965: 381966: 691967: 251968: 11969: 201970: 111971: 91972: 221973: 511974: 141975: 901976: 371977: 51978: 141979: 201980: 131981: 161982: 91983: 251984: 121985: 121986: 81987: 41988: 161989: 211990: 251991: 321992: 2991993: 11994: 131995: 341998: 582000: 32003: 62004: 202005: 382006: 52008: 32009: 32010: 322011: 52012: 51961196619711976198119861991199820062012
1,464 records at Chichihualco still stand. 1992 holds the most, with 299.
Standing records at Chichihualco by the year they were set
Year setStanding records
196187
196282
196385
196466
196538
196669
196725
19681
196920
197011
19719
197222
197351
197414
197590
197637
19775
197814
197920
198013
198116
19829
198325
198412
198512
19868
19874
198816
198921
199025
199132
1992299
19931
199413
199534
199858
20003
20036
200420
200538
20065
20083
20093
201032
20115
20125

Wettest Day of Each Month

Oct: 100.6 mm (4.0 in)
Record daily precipitation for each month at Chichihualco The wettest day on record for each calendar month at Chichihualco. The most was 100.6 mm (4.0 in) on 7 October 1976. 050100150 Jan: 56.9 mm (2.2 in), 16 January 2004 Jan Feb: 45.0 mm (1.8 in), 4 February 2010 Feb Mar: 10.9 mm (0.4 in), 7 March 1981 Mar Apr: 47.0 mm (1.9 in), 5 April 1961 Apr May: 59.9 mm (2.4 in), 30 May 1978 May Jun: 59.9 mm (2.4 in), 15 June 1976 Jun Jul: 69.9 mm (2.8 in), 18 July 1964 Jul Aug: 69.9 mm (2.8 in), 25 August 1990 Aug Sep: 79.2 mm (3.1 in), 22 September 1967 Sep Oct: 100.6 mm (4.0 in), 7 October 1976 Oct Nov: 50.5 mm (2.0 in), 2 November 2002 Nov Dec: 10.4 mm (0.4 in), 2 December 1976 Dec
The wettest day on record for each calendar month at Chichihualco. The most was 100.6 mm (4.0 in) on 7 October 1976.
Record daily precipitation for each month at Chichihualco
MonthRecord daily precipitation (mm)Date
Jan56.9 mm (2.2 in)16 January 2004
Feb45.0 mm (1.8 in)4 February 2010
Mar10.9 mm (0.4 in)7 March 1981
Apr47.0 mm (1.9 in)5 April 1961
May59.9 mm (2.4 in)30 May 1978
Jun59.9 mm (2.4 in)15 June 1976
Jul69.9 mm (2.8 in)18 July 1964
Aug69.9 mm (2.8 in)25 August 1990
Sep79.2 mm (3.1 in)22 September 1967
Oct100.6 mm (4.0 in)7 October 1976
Nov50.5 mm (2.0 in)2 November 2002
Dec10.4 mm (0.4 in)2 December 1976

Period of Record Coverage

1961 to 2012
Days with data per year at Chichihualco 48 years of record at Chichihualco, 1961 to 2012. 11 years have data for under 90 percent of days and are left out of rankings: 1968, 1971, 1987, 1988, 1989, 1991, 1993, 1997 and others. 1961: 365 of 365 days1962: 364 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 337 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 91 of 366 days1969: 365 of 365 days1970: 364 of 365 days1971: 273 of 365 days1972: 365 of 366 days1973: 363 of 365 days1974: 365 of 365 days1975: 358 of 365 days1976: 366 of 366 days1977: 361 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 364 of 365 days1982: 365 of 365 days1983: 363 of 365 days1984: 365 of 366 days1985: 333 of 365 days1986: 334 of 365 days1987: 89 of 365 days1988: 276 of 366 days1989: 304 of 365 days1990: 365 of 365 days1991: 303 of 365 days1992: 336 of 366 days1993: 122 of 365 days1994: 365 of 365 days1995: 365 of 365 days1997: 27 of 365 days1998: 182 of 365 days2000: 182 of 366 days2002: 244 of 365 days2003: 333 of 365 days2004: 366 of 366 days2005: 363 of 365 days2006: 334 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 335 of 366 days19701980199020002010
48 years of record at Chichihualco, 1961 to 2012. 11 years have data for under 90 percent of days and are left out of rankings: 1968, 1971, 1987, 1988, 1989, 1991, 1993, 1997 and others.
Days with data per year at Chichihualco
YearDays with dataShare of yearComplete
1961365100%Yes
1962364100%Yes
1963365100%Yes
1964366100%Yes
196533792%Yes
1966365100%Yes
1967365100%Yes
19689125%No
1969365100%Yes
1970364100%Yes
197127375%No
1972365100%Yes
197336399%Yes
1974365100%Yes
197535898%Yes
1976366100%Yes
197736199%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981364100%Yes
1982365100%Yes
198336399%Yes
1984365100%Yes
198533391%Yes
198633492%Yes
19878924%No
198827675%No
198930483%No
1990365100%Yes
199130383%No
199233692%Yes
199312233%No
1994365100%Yes
1995365100%Yes
1997277%No
199818250%No
200018250%No
200224467%No
200333391%Yes
2004366100%Yes
200536399%Yes
200633492%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
201233592%Yes

Latest Records

20
Latest records at Chichihualco
DateStationRecordValueBeat old record byOld record stoodSignificance
19 September 2012Chichihualco, MXdaily low max (Tie)25.0 C (77.0 F)tie40 years4 of 100 (Routine)
29 June 2012Chichihualco, MXdaily low max (Tie)23.9 C (75.0 F)tie37 years4 of 100 (Routine)
28 June 2012Chichihualco, MXdaily low max (Tie)26.7 C (80.1 F)tie37 years4 of 100 (Routine)
26 June 2012Chichihualco, MXdaily low max (Tie)25.0 C (77.0 F)tie42 years4 of 100 (Routine)
21 June 2012Chichihualco, MXdaily low max25.0 C (77.0 F)0.6 C (1.1 F)32 years15 of 100 (Routine)
12 May 2012Chichihualco, MXdaily rain18.8 mm (0.7 in)14.5 mm (0.6 in)35 years20 of 100 (Routine)
6 May 2012Chichihualco, MXdaily rain (Tie)5.8 mm (0.23 in)tie32 years3 of 100 (Routine)
22 April 2012Chichihualco, MXdaily low min13.9 C (57.0 F)1.1 C (2.0 F)38 years19 of 100 (Routine)
4 April 2012Chichihualco, MXdaily low min (Tie)11.7 C (53.1 F)tie17 years2 of 100 (Routine)
21 March 2012Chichihualco, MXdaily low min (Tie)10.6 C (51.1 F)tie37 years4 of 100 (Routine)
20 February 2012Chichihualco, MXdaily rain5.8 mm (0.23 in)5.8 mm (0.23 in)50 years20 of 100 (Routine)
12 February 2012Chichihualco, MXdaily low max26.7 C (80.1 F)1.1 C (2.0 F)37 years19 of 100 (Routine)
11 February 2012Chichihualco, MXdaily low max22.8 C (73.0 F)2.8 C (5.0 F)28 years21 of 100 (Routine)
9 February 2012Chichihualco, MXdaily rain2.8 mm (0.11 in)2.8 mm (0.11 in)50 years20 of 100 (Routine)
9 February 2012Chichihualco, MXdaily low max (Tie)26.7 C (80.1 F)tie1 year1 of 100 (Routine)
6 February 2012Chichihualco, MXdaily low max (Tie)26.7 C (80.1 F)tie28 years3 of 100 (Routine)
15 January 2012Chichihualco, MXdaily low max (Tie)22.8 C (73.0 F)tie36 years4 of 100 (Routine)
14 January 2012Chichihualco, MXdaily low max22.8 C (73.0 F)2.2 C (4.0 F)36 years22 of 100 (Routine)
28 December 2011Chichihualco, MXdaily rain5.8 mm (0.23 in)5.8 mm (0.23 in)49 years20 of 100 (Routine)
3 December 2011Chichihualco, MXdaily low max25.0 C (77.0 F)0.6 C (1.1 F)37 years17 of 100 (Routine)

Climate Trend

30 complete years, 1961 to 2011
Annual mean temperature at Chichihualco as warming stripes, 1961 to 2011 One stripe for each of 30 complete years at Chichihualco, 1961 to 2011. Blue stripes are years cooler than the station's own mean of 23.8 C (74.9 F); red stripes are warmer. The coolest year was 1975, at 21.4 C (70.5 F), and the warmest was 1963, at 27.9 C (82.1 F). The strongest colour marks a difference of 4.1 C (7.4 F). 1961: 27.5 C, +3.7 C from the station mean1962: 27.7 C, +3.9 C from the station mean1963: 27.9 C, +4.0 C from the station mean1964: 27.3 C, +3.5 C from the station mean1966: 27.7 C, +3.9 C from the station mean1967: 27.1 C, +3.3 C from the station mean1969: 23.6 C, -0.2 C from the station mean1970: 23.0 C, -0.8 C from the station mean1972: 23.2 C, -0.6 C from the station mean1973: 22.8 C, -1.0 C from the station mean1974: 23.0 C, -0.9 C from the station mean1975: 21.4 C, -2.4 C from the station mean1976: 22.1 C, -1.7 C from the station mean1977: 22.9 C, -0.9 C from the station mean1978: 23.0 C, -0.8 C from the station mean1979: 22.9 C, -0.9 C from the station mean1980: 23.2 C, -0.7 C from the station mean1981: 22.9 C, -0.9 C from the station mean1982: 23.5 C, -0.3 C from the station mean1983: 23.1 C, -0.7 C from the station mean1984: 22.8 C, -1.0 C from the station mean1990: 22.5 C, -1.4 C from the station mean1994: 22.6 C, -1.2 C from the station mean1995: 22.0 C, -1.8 C from the station mean2004: 23.5 C, -0.3 C from the station mean2005: 24.2 C, +0.4 C from the station mean2008: 23.2 C, -0.7 C from the station mean2009: 22.9 C, -0.9 C from the station mean2010: 22.3 C, -1.5 C from the station mean2011: 22.9 C, -0.9 C from the station mean19611965197019751980198519901995200020052010
One stripe for each of 30 complete years at Chichihualco, 1961 to 2011. Blue stripes are years cooler than the station's own mean of 23.8 C (74.9 F); red stripes are warmer. The coolest year was 1975, at 21.4 C (70.5 F), and the warmest was 1963, at 27.9 C (82.1 F). The strongest colour marks a difference of 4.1 C (7.4 F).
Annual mean temperature at Chichihualco as warming stripes, 1961 to 2011
YearAnnual mean temperatureDifference from the station mean
196127.5 C+3.67 C
196227.7 C+3.87 C
196327.9 C+4.03 C
196427.3 C+3.48 C
196627.7 C+3.89 C
196727.1 C+3.28 C
196923.6 C-0.23 C
197023.0 C-0.79 C
197223.2 C-0.58 C
197322.8 C-1.01 C
197423.0 C-0.87 C
197521.4 C-2.45 C
197622.1 C-1.75 C
197722.9 C-0.91 C
197823.0 C-0.81 C
197922.9 C-0.92 C
198023.2 C-0.66 C
198122.9 C-0.94 C
198223.5 C-0.29 C
198323.1 C-0.68 C
198422.8 C-1.04 C
199022.5 C-1.36 C
199422.6 C-1.25 C
199522.0 C-1.79 C
200423.5 C-0.33 C
200524.2 C+0.40 C
200823.2 C-0.66 C
200922.9 C-0.91 C
201022.3 C-1.48 C
201122.9 C-0.92 C

The annual mean temperature here has fallen by 0.7 C (0.3 to 1.1) per decade over 1961 to 2011. In Fahrenheit: 1.2 F (0.5 to 2.0) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Chichihualco
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.7 C (-1.1 to -0.3) per decade-1.2 F (-2.0 to -0.5) per decade1961 to 201130Fall
Mean daily maximum-0.50 C (-1.03 to 0.04) per decade-0.9 F (-1.9 to 0.1) per decade1961 to 201130Not clearly different from zero
Mean daily minimum-0.9 C (-1.2 to -0.5) per decade-1.6 F (-2.2 to -1.0) per decade1961 to 201130Fall

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 2012
Yearly extremes at Chichihualco: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.0 C (113.0 F)199237.8 C (100.0 F)48
Coldest night (TNn)5.0 C (41.0 F)19868.9 C (48.0 F)48
Wettest day (Rx1day)100.6 mm (4.0 in)197640.4 mm (1.6 in)48
Wettest five days (Rx5day)182.1 mm (7.2 in)196785.4 mm (3.4 in)48
Longest dry spell (CDD)363 days1973103 days48

Hottest day (TXx)

Hottest day (TXx) at Chichihualco by year The hottest day of the year at Chichihualco, 1961 to 2012. The record is 45.0 C (113.0 F) in 1992, marked on the chart; the median year is 37.8 C (100.0 F). 3035404519701980199020002010Record: 45.0 C (113.0 F) in 1992
The hottest day of the year at Chichihualco, 1961 to 2012. The record is 45.0 C (113.0 F) in 1992, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Chichihualco by year
YearHottest day (TXx)
196144.4 C (111.9 F)
196243.9 C (111.0 F)
196342.8 C (109.0 F)
196442.8 C (109.0 F)
196542.8 C (109.0 F)
196642.2 C (108.0 F)
196741.1 C (106.0 F)
196839.4 C (102.9 F)
196938.9 C (102.0 F)
197035.6 C (96.1 F)
197137.8 C (100.0 F)
197235.6 C (96.1 F)
197335.6 C (96.1 F)
197436.7 C (98.1 F)
197535.6 C (96.1 F)
197637.2 C (99.0 F)
197738.3 C (100.9 F)
197837.2 C (99.0 F)
197936.1 C (97.0 F)
198037.8 C (100.0 F)
198136.7 C (98.1 F)
198237.8 C (100.0 F)
198337.8 C (100.0 F)
198436.7 C (98.1 F)
198535.6 C (96.1 F)
198637.8 C (100.0 F)
198732.8 C (91.0 F)
198838.9 C (102.0 F)
198935.0 C (95.0 F)
199037.2 C (99.0 F)
199140.6 C (105.1 F)
199245.0 C (113.0 F)
199335.6 C (96.1 F)
199436.1 C (97.0 F)
199535.6 C (96.1 F)
199730.6 C (87.1 F)
199840.0 C (104.0 F)
200036.7 C (98.1 F)
200237.8 C (100.0 F)
200335.0 C (95.0 F)
200437.8 C (100.0 F)
200542.8 C (109.0 F)
200638.9 C (102.0 F)
200835.6 C (96.1 F)
200936.7 C (98.1 F)
201038.9 C (102.0 F)
201137.8 C (100.0 F)
201235.6 C (96.1 F)

Coldest night (TNn)

Coldest night (TNn) at Chichihualco by year The coldest night of the year at Chichihualco, 1961 to 2012. The record is 5.0 C (41.0 F) in 1986, marked on the chart; the median year is 8.9 C (48.0 F). 57.51012.51519701980199020002010Record: 5.0 C (41.0 F) in 1986
The coldest night of the year at Chichihualco, 1961 to 2012. The record is 5.0 C (41.0 F) in 1986, marked on the chart; the median year is 8.9 C (48.0 F).
Coldest night (TNn) at Chichihualco by year
YearColdest night (TNn)
196110.0 C (50.0 F)
196211.7 C (53.1 F)
196311.7 C (53.1 F)
196411.7 C (53.1 F)
196511.7 C (53.1 F)
196611.7 C (53.1 F)
196711.1 C (52.0 F)
196810.6 C (51.1 F)
19698.9 C (48.0 F)
197010.0 C (50.0 F)
197110.0 C (50.0 F)
197210.0 C (50.0 F)
197310.0 C (50.0 F)
197410.6 C (51.1 F)
19756.7 C (44.1 F)
19767.8 C (46.0 F)
19779.4 C (48.9 F)
19789.4 C (48.9 F)
19798.3 C (46.9 F)
19807.8 C (46.0 F)
19817.8 C (46.0 F)
19827.8 C (46.0 F)
19836.7 C (44.1 F)
19846.7 C (44.1 F)
19858.9 C (48.0 F)
19865.0 C (41.0 F)
19876.7 C (44.1 F)
19886.7 C (44.1 F)
19897.8 C (46.0 F)
19906.7 C (44.1 F)
19916.7 C (44.1 F)
19926.7 C (44.1 F)
199310.6 C (51.1 F)
199410.6 C (51.1 F)
19955.6 C (42.1 F)
199712.8 C (55.0 F)
19988.9 C (48.0 F)
200010.6 C (51.1 F)
200213.9 C (57.0 F)
200310.0 C (50.0 F)
20045.6 C (42.1 F)
20055.0 C (41.0 F)
20067.8 C (46.0 F)
20088.9 C (48.0 F)
20098.9 C (48.0 F)
20106.7 C (44.1 F)
20118.9 C (48.0 F)
20128.9 C (48.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Chichihualco by year The wettest day of the year at Chichihualco, 1961 to 2012. The record is 100.6 mm (4.0 in) in 1976, marked on the chart; the median year is 40.4 mm (1.6 in). 05010015019701980199020002010Record: 100.6 mm (4.0 in) in 1976
The wettest day of the year at Chichihualco, 1961 to 2012. The record is 100.6 mm (4.0 in) in 1976, marked on the chart; the median year is 40.4 mm (1.6 in).
Wettest day (Rx1day) at Chichihualco by year
YearWettest day (Rx1day)
196163.8 mm (2.5 in)
196240.9 mm (1.6 in)
196364.3 mm (2.5 in)
196469.9 mm (2.8 in)
196565.3 mm (2.6 in)
196638.9 mm (1.5 in)
196779.2 mm (3.1 in)
19688.4 mm (0.33 in)
196931.5 mm (1.2 in)
197040.9 mm (1.6 in)
197165.8 mm (2.6 in)
19728.9 mm (0.35 in)
19730.0 mm (0.00 in)
19740.0 mm (0.00 in)
197520.6 mm (0.8 in)
1976100.6 mm (4.0 in)
197734.5 mm (1.4 in)
197859.9 mm (2.4 in)
197947.0 mm (1.9 in)
198035.8 mm (1.4 in)
198140.9 mm (1.6 in)
198234.8 mm (1.4 in)
198345.0 mm (1.8 in)
198459.9 mm (2.4 in)
198539.9 mm (1.6 in)
198659.9 mm (2.4 in)
198743.9 mm (1.7 in)
198827.4 mm (1.1 in)
198932.8 mm (1.3 in)
199069.9 mm (2.8 in)
199147.8 mm (1.9 in)
199219.8 mm (0.8 in)
199321.8 mm (0.9 in)
199450.3 mm (2.0 in)
199519.8 mm (0.8 in)
199715.7 mm (0.6 in)
199824.9 mm (1.0 in)
200011.9 mm (0.5 in)
200250.5 mm (2.0 in)
200342.7 mm (1.7 in)
200456.9 mm (2.2 in)
200528.2 mm (1.1 in)
200620.3 mm (0.8 in)
200831.8 mm (1.3 in)
200939.9 mm (1.6 in)
201045.0 mm (1.8 in)
201141.9 mm (1.6 in)
201227.9 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Chichihualco by year The wettest five days of the year at Chichihualco, 1961 to 2012. The record is 182.1 mm (7.2 in) in 1967, marked on the chart; the median year is 85.4 mm (3.4 in). 05010015020019701980199020002010Record: 182.1 mm (7.2 in) in 1967
The wettest five days of the year at Chichihualco, 1961 to 2012. The record is 182.1 mm (7.2 in) in 1967, marked on the chart; the median year is 85.4 mm (3.4 in).
Wettest five days (Rx5day) at Chichihualco by year
YearWettest five days (Rx5day)
196193.8 mm (3.7 in)
196279.3 mm (3.1 in)
1963120.5 mm (4.7 in)
1964115.2 mm (4.5 in)
1965113.9 mm (4.5 in)
196680.9 mm (3.2 in)
1967182.1 mm (7.2 in)
19688.4 mm (0.33 in)
196959.7 mm (2.4 in)
197050.8 mm (2.0 in)
197170.6 mm (2.8 in)
197224.7 mm (1.0 in)
19730.0 mm (0.00 in)
19740.0 mm (0.00 in)
197568.3 mm (2.7 in)
1976150.2 mm (5.9 in)
197777.7 mm (3.1 in)
197882.8 mm (3.3 in)
1979140.5 mm (5.5 in)
198089.7 mm (3.5 in)
198196.2 mm (3.8 in)
198289.4 mm (3.5 in)
198386.5 mm (3.4 in)
1984132.6 mm (5.2 in)
1985102.4 mm (4.0 in)
1986132.9 mm (5.2 in)
198792.6 mm (3.6 in)
198892.3 mm (3.6 in)
198976.3 mm (3.0 in)
199095.5 mm (3.8 in)
1991100.3 mm (3.9 in)
199275.2 mm (3.0 in)
199331.7 mm (1.2 in)
1994105.5 mm (4.2 in)
199560.7 mm (2.4 in)
199754.9 mm (2.2 in)
199852.9 mm (2.1 in)
200047.5 mm (1.9 in)
2002107.4 mm (4.2 in)
2003140.8 mm (5.5 in)
200466.6 mm (2.6 in)
200586.6 mm (3.4 in)
200666.9 mm (2.6 in)
200885.8 mm (3.4 in)
200981.0 mm (3.2 in)
201084.9 mm (3.3 in)
2011111.8 mm (4.4 in)
201273.4 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Chichihualco by year The longest dry spell of the year at Chichihualco, 1961 to 2012. The record is 363 days in 1973, marked on the chart; the median year is 103 days. 010020030040019701980199020002010Record: 363 days in 1973
The longest dry spell of the year at Chichihualco, 1961 to 2012. The record is 363 days in 1973, marked on the chart; the median year is 103 days.
Longest dry spell (CDD) at Chichihualco by year
YearLongest dry spell (CDD)
196171 days
1962103 days
1963181 days
196477 days
196571 days
196691 days
1967124 days
196840 days
196979 days
1970152 days
197177 days
1972214 days
1973363 days
197492 days
1975107 days
197675 days
197779 days
197842 days
1979133 days
1980102 days
198161 days
1982110 days
198370 days
1984127 days
1985144 days
1986111 days
198759 days
198899 days
1989151 days
1990151 days
1991145 days
199234 days
1993100 days
1994108 days
1995151 days
19973 days
1998146 days
2000152 days
200249 days
200388 days
200466 days
2005106 days
200656 days
2008107 days
2009116 days
2010108 days
2011104 days
201275 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

38 years, 1961 to 2012

A day with at least 41.3 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 96.7 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Chichihualco: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years41.3 mm (1.6 in)
5 years59.4 mm (2.3 in)
10 years69.9 mm (2.8 in)
25 years81.8 mm (3.2 in)
50 years89.7 mm (3.5 in)Longer than the 38 years of record
100 years96.7 mm (3.8 in)Longer than the 38 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, 38 years of values from 1961 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: 100.6 mm (4.0 in) in 1976; 79.2 mm (3.1 in) in 1967; 69.9 mm (2.8 in) in 1964.

Download the Data

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