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Santiago Choapan Weather Records (MXN00020030)

Record envelope, standing records and threshold days for Santiago Choapan (MXN00020030), Mexico, with 59 years of record.

Key Facts for Santiago Choapan

  • Santiago Choapan (MXN00020030) is a weather station in Mexico at 17.37 latitude and -95.92 longitude, 900 m (2,952 ft) above sea level.
  • The station reports from 1952 to 2010, 59 years of record.
  • 1,464 records set at Santiago Choapan still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Santiago Choapan tied a daily record high minimum temperature of 17.8 C (64.0 F) on 31 December 2010.

About the Station

  • Location: Mexico, 17.37 latitude, -95.92 longitude.
  • Elevation: 900 m (2,952 ft).
  • Period of record: 1952 to 2010, 59 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 Santiago Choapan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Santiago Choapan. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Santiago Choapan. 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 Santiago Choapan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan36.1 C (97.0 F)7.2 C (45.0 F)n/an/a
Feb32.8 C (91.0 F)5.6 C (42.1 F)n/an/a
Mar40.0 C (104.0 F)8.9 C (48.0 F)n/an/a
Apr40.0 C (104.0 F)10.6 C (51.1 F)n/an/a
May40.0 C (104.0 F)7.8 C (46.0 F)n/an/a
Jun35.6 C (96.1 F)10.0 C (50.0 F)n/an/a
Jul33.9 C (93.0 F)12.8 C (55.0 F)n/an/a
Aug31.7 C (89.1 F)12.2 C (54.0 F)n/an/a
Sep32.8 C (91.0 F)11.7 C (53.1 F)n/an/a
Oct32.2 C (90.0 F)10.0 C (50.0 F)n/an/a
Nov31.7 C (89.1 F)9.4 C (48.9 F)n/an/a
Dec35.0 C (95.0 F)7.8 C (46.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Santiago Choapan by the year they were set 1,464 records at Santiago Choapan still stand. 1953 holds the most, with 134. 0501001501952: 541953: 1341954: 571955: 631956: 231957: 531958: 691959: 361960: 1091961: 351962: 491963: 311964: 131965: 71967: 241968: 151969: 581970: 91971: 91972: 211973: 631974: 371975: 231976: 241977: 291978: 481979: 311980: 461981: 411982: 221983: 381984: 442006: 302007: 202008: 192009: 272010: 531952195619601964196919731977198120062010
1,464 records at Santiago Choapan still stand. 1953 holds the most, with 134.
Standing records at Santiago Choapan by the year they were set
Year setStanding records
195254
1953134
195457
195563
195623
195753
195869
195936
1960109
196135
196249
196331
196413
19657
196724
196815
196958
19709
19719
197221
197363
197437
197523
197624
197729
197848
197931
198046
198141
198222
198338
198444
200630
200720
200819
200927
201053

All-Time Record Progression

1 new records
When Santiago Choapan set new all-time records 1 all-time records were set at Santiago Choapan between 9 January 2010 and 9 January 2010. Each dot is a new record. Record low maximum temperature9 January 2010: Record low maximum temperature 10.0 C (50.0 F)2010
1 all-time records were set at Santiago Choapan between 9 January 2010 and 9 January 2010. Each dot is a new record.
When Santiago Choapan set new all-time records
DateKindDetail
2010-01-09Record low maximum temperatureRecord low maximum temperature 10.0 C (50.0 F)

Wettest Day of Each Month

Sep: 239.8 mm (9.4 in)
Record daily precipitation for each month at Santiago Choapan The wettest day on record for each calendar month at Santiago Choapan. The most was 239.8 mm (9.4 in) on 20 September 1974. 0100200300 Jan: 185.9 mm (7.3 in), 1 January 2008 Jan Feb: 86.4 mm (3.4 in), 22 February 2009 Feb Mar: 59.9 mm (2.4 in), 4 March 1952 Mar Apr: 188.0 mm (7.4 in), 19 April 2009 Apr May: 157.0 mm (6.2 in), 21 May 1978 May Jun: 199.9 mm (7.9 in), 20 June 1973 Jun Jul: 162.8 mm (6.4 in), 5 July 1983 Jul Aug: 170.9 mm (6.7 in), 18 August 2009 Aug Sep: 239.8 mm (9.4 in), 20 September 1974 Sep Oct: 164.8 mm (6.5 in), 27 October 2006 Oct Nov: 143.8 mm (5.7 in), 11 November 2006 Nov Dec: 126.0 mm (5.0 in), 3 December 2006 Dec
The wettest day on record for each calendar month at Santiago Choapan. The most was 239.8 mm (9.4 in) on 20 September 1974.
Record daily precipitation for each month at Santiago Choapan
MonthRecord daily precipitation (mm)Date
Jan185.9 mm (7.3 in)1 January 2008
Feb86.4 mm (3.4 in)22 February 2009
Mar59.9 mm (2.4 in)4 March 1952
Apr188.0 mm (7.4 in)19 April 2009
May157.0 mm (6.2 in)21 May 1978
Jun199.9 mm (7.9 in)20 June 1973
Jul162.8 mm (6.4 in)5 July 1983
Aug170.9 mm (6.7 in)18 August 2009
Sep239.8 mm (9.4 in)20 September 1974
Oct164.8 mm (6.5 in)27 October 2006
Nov143.8 mm (5.7 in)11 November 2006
Dec126.0 mm (5.0 in)3 December 2006

Period of Record Coverage

1952 to 2010
Days with data per year at Santiago Choapan 37 years of record at Santiago Choapan, 1952 to 2010. 2 years have data for under 90 percent of days and are left out of rankings: 1952, 1971. 1952: 279 of 366 days1953: 363 of 365 days1954: 363 of 365 days1955: 364 of 365 days1956: 358 of 366 days1957: 363 of 365 days1958: 351 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 273 of 365 days1972: 366 of 366 days1973: 364 of 365 days1974: 362 of 365 days1975: 364 of 365 days1976: 365 of 366 days1977: 363 of 365 days1978: 363 of 365 days1979: 363 of 365 days1980: 362 of 366 days1981: 334 of 365 days1982: 363 of 365 days1983: 364 of 365 days1984: 332 of 366 days2006: 362 of 365 days2007: 361 of 365 days2008: 362 of 366 days2009: 363 of 365 days2010: 361 of 365 days1955196019651970197519802010
37 years of record at Santiago Choapan, 1952 to 2010. 2 years have data for under 90 percent of days and are left out of rankings: 1952, 1971.
Days with data per year at Santiago Choapan
YearDays with dataShare of yearComplete
195227976%No
195336399%Yes
195436399%Yes
1955364100%Yes
195635898%Yes
195736399%Yes
195835196%Yes
1959364100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1967365100%Yes
1968366100%Yes
1969364100%Yes
1970365100%Yes
197127375%No
1972366100%Yes
1973364100%Yes
197436299%Yes
1975364100%Yes
1976365100%Yes
197736399%Yes
197836399%Yes
197936399%Yes
198036299%Yes
198133492%Yes
198236399%Yes
1983364100%Yes
198433291%Yes
200636299%Yes
200736199%Yes
200836299%Yes
200936399%Yes
201036199%Yes

Latest Records

20
Latest records at Santiago Choapan
DateStationRecordValueBeat old record byOld record stoodSignificance
31 December 2010Santiago Choapan, MXdaily high min (Tie)17.8 C (64.0 F)tie40 years4 of 100 (Routine)
28 December 2010Santiago Choapan, MXdaily low max16.1 C (61.0 F)1.1 C (2.0 F)0 years7 of 100 (Routine)
27 December 2010Santiago Choapan, MXdaily low max15.0 C (59.0 F)0.6 C (1.1 F)35 years16 of 100 (Routine)
26 December 2010Santiago Choapan, MXdaily low max13.3 C (55.9 F)1.7 C (3.1 F)4 years10 of 100 (Routine)
25 December 2010Santiago Choapan, MXdaily rain28.4 mm (1.1 in)10.6 mm (0.4 in)4 years13 of 100 (Routine)
13 December 2010Santiago Choapan, MXdaily low max13.9 C (57.0 F)2.8 C (5.0 F)56 years29 of 100 (Routine)
12 December 2010Santiago Choapan, MXdaily low min (Tie)10.0 C (50.0 F)tie36 years4 of 100 (Routine)
26 November 2010Santiago Choapan, MXdaily rain41.9 mm (1.6 in)14.5 mm (0.6 in)0 years11 of 100 (Routine)
12 November 2010Santiago Choapan, MXdaily low min (Tie)12.8 C (55.0 F)tie49 years4 of 100 (Routine)
7 November 2010Santiago Choapan, MXdaily low max17.8 C (64.0 F)2.2 C (4.0 F)51 years26 of 100 (Routine)
6 November 2010Santiago Choapan, MXdaily low min10.6 C (51.1 F)1.6 C (2.9 F)33 years22 of 100 (Routine)
5 November 2010Santiago Choapan, MXdaily low max (Tie)17.8 C (64.0 F)tie56 years5 of 100 (Routine)
4 November 2010Santiago Choapan, MXdaily low min (Tie)11.7 C (53.1 F)tie37 years4 of 100 (Routine)
29 October 2010Santiago Choapan, MXdaily rain30.5 mm (1.2 in)12.7 mm (0.5 in)47 years24 of 100 (Routine)
11 October 2010Santiago Choapan, MXdaily low min (Tie)13.9 C (57.0 F)tie57 years5 of 100 (Routine)
8 October 2010Santiago Choapan, MXdaily low max20.0 C (68.0 F)0.6 C (1.1 F)40 years19 of 100 (Routine)
7 October 2010Santiago Choapan, MXdaily low max17.8 C (64.0 F)2.2 C (4.0 F)40 years24 of 100 (Routine)
6 October 2010Santiago Choapan, MXdaily low max18.3 C (64.9 F)2.8 C (5.0 F)40 years27 of 100 (Routine)
29 September 2010Santiago Choapan, MXmonthly low max18.3 C (64.9 F)0.6 C (1.1 F)0 years17 of 100 (Routine)
28 September 2010Santiago Choapan, MXdaily low max (Tie)20.0 C (68.0 F)tie28 years3 of 100 (Routine)

Climate Trend

32 complete years, 1953 to 2010
Annual mean temperature at Santiago Choapan as warming stripes, 1953 to 2010 One stripe for each of 32 complete years at Santiago Choapan, 1953 to 2010. Blue stripes are years cooler than the station's own mean of 21.3 C (70.4 F); red stripes are warmer. The coolest year was 1960, at 19.0 C (66.2 F), and the warmest was 1963, at 23.2 C (73.7 F). The strongest colour marks a difference of 2.4 C (4.3 F). 1953: 22.7 C, +1.4 C from the station mean1954: 21.3 C, 0.0 C from the station mean1955: 22.0 C, +0.6 C from the station mean1956: 21.4 C, 0.0 C from the station mean1957: 22.2 C, +0.9 C from the station mean1959: 20.4 C, -0.9 C from the station mean1960: 19.0 C, -2.3 C from the station mean1961: 21.1 C, -0.2 C from the station mean1962: 22.7 C, +1.3 C from the station mean1963: 23.2 C, +1.8 C from the station mean1964: 22.6 C, +1.3 C from the station mean1965: 22.7 C, +1.4 C from the station mean1967: 22.1 C, +0.7 C from the station mean1968: 21.8 C, +0.4 C from the station mean1969: 20.0 C, -1.3 C from the station mean1970: 21.1 C, -0.3 C from the station mean1972: 21.7 C, +0.4 C from the station mean1973: 21.3 C, 0.0 C from the station mean1974: 20.7 C, -0.6 C from the station mean1975: 21.0 C, -0.3 C from the station mean1976: 20.3 C, -1.0 C from the station mean1977: 21.2 C, -0.2 C from the station mean1978: 20.7 C, -0.6 C from the station mean1979: 20.5 C, -0.8 C from the station mean1980: 20.8 C, -0.5 C from the station mean1982: 21.4 C, +0.1 C from the station mean1983: 21.6 C, +0.2 C from the station mean2006: 21.4 C, 0.0 C from the station mean2007: 21.4 C, 0.0 C from the station mean2008: 21.1 C, -0.2 C from the station mean2009: 21.1 C, -0.3 C from the station mean2010: 20.1 C, -1.2 C from the station mean195319601965197019751980198519901995200020052010
One stripe for each of 32 complete years at Santiago Choapan, 1953 to 2010. Blue stripes are years cooler than the station's own mean of 21.3 C (70.4 F); red stripes are warmer. The coolest year was 1960, at 19.0 C (66.2 F), and the warmest was 1963, at 23.2 C (73.7 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Santiago Choapan as warming stripes, 1953 to 2010
YearAnnual mean temperatureDifference from the station mean
195322.7 C+1.37 C
195421.3 C0.00 C
195522.0 C+0.63 C
195621.4 C+0.04 C
195722.2 C+0.86 C
195920.4 C-0.93 C
196019.0 C-2.30 C
196121.1 C-0.24 C
196222.7 C+1.34 C
196323.2 C+1.85 C
196422.6 C+1.28 C
196522.7 C+1.40 C
196722.1 C+0.74 C
196821.8 C+0.45 C
196920.0 C-1.29 C
197021.1 C-0.26 C
197221.7 C+0.42 C
197321.3 C-0.03 C
197420.7 C-0.61 C
197521.0 C-0.33 C
197620.3 C-0.98 C
197721.2 C-0.15 C
197820.7 C-0.59 C
197920.5 C-0.78 C
198020.8 C-0.51 C
198221.4 C+0.11 C
198321.6 C+0.25 C
200621.4 C+0.04 C
200721.4 C+0.04 C
200821.1 C-0.21 C
200921.1 C-0.27 C
201020.1 C-1.23 C

The fitted trend in annual mean temperature here over 1953 to 2010 is -0.15 C (-0.34 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.3 F (-0.6 to 0.1) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Santiago Choapan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.15 C (-0.34 to 0.04) per decade-0.3 F (-0.6 to 0.1) per decade1953 to 201032Not clearly different from zero
Mean daily maximum-0.3 C (-0.6 to -0.1) per decade-0.6 F (-1.1 to -0.1) per decade1953 to 201032Fall
Mean daily minimum0.04 C (-0.12 to 0.20) per decade0.1 F (-0.2 to 0.4) per decade1953 to 201032Not 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

1952 to 2010
Yearly extremes at Santiago Choapan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.0 C (104.0 F)195335.0 C (95.0 F)37
Coldest night (TNn)5.6 C (42.1 F)19738.9 C (48.0 F)37
Wettest day (Rx1day)239.8 mm (9.4 in)1974109.0 mm (4.3 in)37
Wettest five days (Rx5day)507.5 mm (20.0 in)2010246.6 mm (9.7 in)37
Longest dry spell (CDD)153 days197032 days37

Hottest day (TXx)

Hottest day (TXx) at Santiago Choapan by year The hottest day of the year at Santiago Choapan, 1952 to 2010. The record is 40.0 C (104.0 F) in 1953, marked on the chart; the median year is 35.0 C (95.0 F). 25303540196019701980199020002010Record: 40.0 C (104.0 F) in 1953
The hottest day of the year at Santiago Choapan, 1952 to 2010. The record is 40.0 C (104.0 F) in 1953, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Santiago Choapan by year
YearHottest day (TXx)
195236.7 C (98.1 F)
195340.0 C (104.0 F)
195436.7 C (98.1 F)
195537.8 C (100.0 F)
195632.8 C (91.0 F)
195738.9 C (102.0 F)
195833.9 C (93.0 F)
195931.7 C (89.1 F)
196030.6 C (87.1 F)
196133.9 C (93.0 F)
196231.7 C (89.1 F)
196333.9 C (93.0 F)
196433.9 C (93.0 F)
196531.7 C (89.1 F)
196731.7 C (89.1 F)
196830.6 C (87.1 F)
196933.9 C (93.0 F)
197029.4 C (84.9 F)
197131.7 C (89.1 F)
197238.9 C (102.0 F)
197337.2 C (99.0 F)
197435.0 C (95.0 F)
197535.0 C (95.0 F)
197635.0 C (95.0 F)
197735.0 C (95.0 F)
197835.6 C (96.1 F)
197935.0 C (95.0 F)
198035.6 C (96.1 F)
198133.9 C (93.0 F)
198236.1 C (97.0 F)
198335.6 C (96.1 F)
198440.0 C (104.0 F)
200635.0 C (95.0 F)
200733.3 C (91.9 F)
200834.4 C (93.9 F)
200933.3 C (91.9 F)
201035.0 C (95.0 F)

Coldest night (TNn)

Coldest night (TNn) at Santiago Choapan by year The coldest night of the year at Santiago Choapan, 1952 to 2010. The record is 5.6 C (42.1 F) in 1973, marked on the chart; the median year is 8.9 C (48.0 F). 468101214196019701980199020002010Record: 5.6 C (42.1 F) in 1973
The coldest night of the year at Santiago Choapan, 1952 to 2010. The record is 5.6 C (42.1 F) in 1973, marked on the chart; the median year is 8.9 C (48.0 F).
Coldest night (TNn) at Santiago Choapan by year
YearColdest night (TNn)
195210.6 C (51.1 F)
19538.9 C (48.0 F)
19547.8 C (46.0 F)
19557.8 C (46.0 F)
19568.9 C (48.0 F)
19577.8 C (46.0 F)
19587.8 C (46.0 F)
195910.0 C (50.0 F)
196010.0 C (50.0 F)
196110.0 C (50.0 F)
196210.0 C (50.0 F)
196310.0 C (50.0 F)
196412.2 C (54.0 F)
196510.0 C (50.0 F)
196710.0 C (50.0 F)
196810.6 C (51.1 F)
196910.0 C (50.0 F)
19709.4 C (48.9 F)
197110.0 C (50.0 F)
197210.0 C (50.0 F)
19735.6 C (42.1 F)
19748.9 C (48.0 F)
19759.4 C (48.9 F)
19768.9 C (48.0 F)
19778.9 C (48.0 F)
19787.8 C (46.0 F)
19798.9 C (48.0 F)
19808.9 C (48.0 F)
19819.4 C (48.9 F)
19828.9 C (48.0 F)
19837.8 C (46.0 F)
19848.9 C (48.0 F)
20068.9 C (48.0 F)
20078.9 C (48.0 F)
200810.0 C (50.0 F)
20098.9 C (48.0 F)
20106.7 C (44.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Santiago Choapan by year The wettest day of the year at Santiago Choapan, 1952 to 2010. The record is 239.8 mm (9.4 in) in 1974, marked on the chart; the median year is 109.0 mm (4.3 in). 050100150200250196019701980199020002010Record: 239.8 mm (9.4 in) in 1974
The wettest day of the year at Santiago Choapan, 1952 to 2010. The record is 239.8 mm (9.4 in) in 1974, marked on the chart; the median year is 109.0 mm (4.3 in).
Wettest day (Rx1day) at Santiago Choapan by year
YearWettest day (Rx1day)
1952110.0 mm (4.3 in)
1953138.9 mm (5.5 in)
1954126.0 mm (5.0 in)
1955119.9 mm (4.7 in)
1956116.8 mm (4.6 in)
195796.3 mm (3.8 in)
195886.9 mm (3.4 in)
1959100.8 mm (4.0 in)
196079.8 mm (3.1 in)
196195.0 mm (3.7 in)
196288.4 mm (3.5 in)
196397.8 mm (3.9 in)
196483.8 mm (3.3 in)
196596.8 mm (3.8 in)
196782.8 mm (3.3 in)
1968104.9 mm (4.1 in)
1969100.6 mm (4.0 in)
197063.5 mm (2.5 in)
197170.9 mm (2.8 in)
197241.4 mm (1.6 in)
1973199.9 mm (7.9 in)
1974239.8 mm (9.4 in)
1975143.8 mm (5.7 in)
1976128.8 mm (5.1 in)
1977109.0 mm (4.3 in)
1978157.0 mm (6.2 in)
1979129.8 mm (5.1 in)
198089.9 mm (3.5 in)
1981119.4 mm (4.7 in)
1982108.0 mm (4.3 in)
1983162.8 mm (6.4 in)
1984130.8 mm (5.1 in)
2006164.8 mm (6.5 in)
200790.4 mm (3.6 in)
2008185.9 mm (7.3 in)
2009188.0 mm (7.4 in)
2010230.4 mm (9.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Santiago Choapan by year The wettest five days of the year at Santiago Choapan, 1952 to 2010. The record is 507.5 mm (20.0 in) in 2010, marked on the chart; the median year is 246.6 mm (9.7 in). 100200300400500600196019701980199020002010Record: 507.5 mm (20.0 in) in 2010
The wettest five days of the year at Santiago Choapan, 1952 to 2010. The record is 507.5 mm (20.0 in) in 2010, marked on the chart; the median year is 246.6 mm (9.7 in).
Wettest five days (Rx5day) at Santiago Choapan by year
YearWettest five days (Rx5day)
1952241.6 mm (9.5 in)
1953252.5 mm (9.9 in)
1954246.4 mm (9.7 in)
1955352.3 mm (13.9 in)
1956234.8 mm (9.2 in)
1957207.8 mm (8.2 in)
1958206.5 mm (8.1 in)
1959226.3 mm (8.9 in)
1960192.6 mm (7.6 in)
1961345.6 mm (13.6 in)
1962227.6 mm (9.0 in)
1963262.9 mm (10.4 in)
1964224.5 mm (8.8 in)
1965308.9 mm (12.2 in)
1967120.3 mm (4.7 in)
1968266.8 mm (10.5 in)
1969404.6 mm (15.9 in)
1970150.4 mm (5.9 in)
1971127.0 mm (5.0 in)
1972118.3 mm (4.7 in)
1973317.1 mm (12.5 in)
1974426.3 mm (16.8 in)
1975325.2 mm (12.8 in)
1976261.7 mm (10.3 in)
1977222.5 mm (8.8 in)
1978308.3 mm (12.1 in)
1979207.3 mm (8.2 in)
1980195.8 mm (7.7 in)
1981268.5 mm (10.6 in)
1982246.6 mm (9.7 in)
1983261.7 mm (10.3 in)
1984386.4 mm (15.2 in)
2006221.7 mm (8.7 in)
2007179.1 mm (7.1 in)
2008386.4 mm (15.2 in)
2009272.0 mm (10.7 in)
2010507.5 mm (20.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Santiago Choapan by year The longest dry spell of the year at Santiago Choapan, 1952 to 2010. The record is 153 days in 1970, marked on the chart; the median year is 32 days. 050100150200196019701980199020002010Record: 153 days in 1970
The longest dry spell of the year at Santiago Choapan, 1952 to 2010. The record is 153 days in 1970, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Santiago Choapan by year
YearLongest dry spell (CDD)
195214 days
195342 days
195423 days
195534 days
195616 days
195717 days
195818 days
195932 days
196085 days
196166 days
196238 days
196387 days
196448 days
196563 days
196763 days
1968101 days
196954 days
1970153 days
197187 days
1972122 days
197334 days
197419 days
197519 days
197622 days
197728 days
197813 days
197916 days
198037 days
198117 days
198239 days
198334 days
198423 days
200624 days
200719 days
200820 days
200919 days
201019 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

36 years, 1952 to 2010

A day with at least 112.8 mm (4.4 in) of rain is expected about once in 2 years. A day with at least 283.6 mm (11.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Santiago Choapan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years112.8 mm (4.4 in)
5 years152.2 mm (6.0 in)
10 years180.6 mm (7.1 in)
25 years219.5 mm (8.6 in)
50 years250.7 mm (9.9 in)Longer than the 36 years of record
100 years283.6 mm (11.2 in)Longer than the 36 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, 36 years of values from 1952 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: 239.8 mm (9.4 in) in 1974; 230.4 mm (9.1 in) in 2010; 199.9 mm (7.9 in) in 1973.

Download the Data

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