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San Juan Chamula Weather Records (MXN00007030)

Record envelope, standing records and threshold days for San Juan Chamula (MXN00007030), Mexico, with 58 years of record.

Key Facts for San Juan Chamula

  • San Juan Chamula (MXN00007030) is a weather station in Mexico at 16.78 latitude and -92.68 longitude, 1,930 m (6,332 ft) above sea level.
  • The station reports from 1956 to 2013, 58 years of record.
  • 1,464 records set at San Juan Chamula still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Juan Chamula set a daily record precipitation of 32.8 mm (1.3 in) on 29 June 2013.

About the Station

  • Location: Mexico, 16.78 latitude, -92.68 longitude.
  • Elevation: 1,930 m (6,332 ft).
  • Period of record: 1956 to 2013, 58 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 Juan Chamula, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Juan Chamula. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -100102030 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Juan Chamula. 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 Juan Chamula, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan30.0 C (86.0 F)-5.6 C (21.9 F)n/an/a
Feb27.8 C (82.0 F)-5.0 C (23.0 F)n/an/a
Mar30.0 C (86.0 F)-5.0 C (23.0 F)n/an/a
Apr30.0 C (86.0 F)-4.4 C (24.1 F)n/an/a
May30.0 C (86.0 F)-2.2 C (28.0 F)n/an/a
Jun28.3 C (82.9 F)0.0 C (32.0 F)n/an/a
Jul28.9 C (84.0 F)0.0 C (32.0 F)n/an/a
Aug27.8 C (82.0 F)0.6 C (33.1 F)n/an/a
Sep27.8 C (82.0 F)0.0 C (32.0 F)n/an/a
Oct28.9 C (84.0 F)-3.9 C (25.0 F)n/an/a
Nov29.4 C (84.9 F)-5.0 C (23.0 F)n/an/a
Dec30.0 C (86.0 F)-7.2 C (19.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Juan Chamula by the year they were set 1,464 records at San Juan Chamula still stand. 1965 holds the most, with 173. 0501001502001961: 221962: 421963: 841964: 971965: 1731966: 321967: 181968: 201971: 161972: 251973: 431974: 201975: 181976: 131977: 341978: 241979: 361980: 381981: 291982: 351983: 421984: 271985: 211986: 231987: 191988: 161989: 171990: 141991: 81992: 61993: 91994: 111998: 81999: 392000: 332001: 232002: 352003: 362004: 342006: 82007: 282008: 342009: 232010: 362011: 352012: 332013: 271961196619731978198319881993200120072012
1,464 records at San Juan Chamula still stand. 1965 holds the most, with 173.
Standing records at San Juan Chamula by the year they were set
Year setStanding records
196122
196242
196384
196497
1965173
196632
196718
196820
197116
197225
197343
197420
197518
197613
197734
197824
197936
198038
198129
198235
198342
198427
198521
198623
198719
198816
198917
199014
19918
19926
19939
199411
19988
199939
200033
200123
200235
200336
200434
20068
200728
200834
200923
201036
201135
201233
201327

All-Time Record Progression

5 new records
When San Juan Chamula set new all-time records 5 all-time records were set at San Juan Chamula between 28 December 1999 and 2 March 2013. Each dot is a new record. Record low minimum temperatureRecord daily precipitationRecord low maximum temperature28 December 1999: Record low minimum temperature -6.1 C (21.0 F)25 September 2010: Record daily precipitation 117.9 mm (4.6 in)5 November 2010: Record low maximum temperature 5.6 C (42.1 F)11 December 2010: Record low minimum temperature -7.2 C (19.0 F)2 March 2013: Record low maximum temperature 5.0 C (41.0 F)200020052010
5 all-time records were set at San Juan Chamula between 28 December 1999 and 2 March 2013. Each dot is a new record.
When San Juan Chamula set new all-time records
DateKindDetail
1999-12-28Record low minimum temperatureRecord low minimum temperature -6.1 C (21.0 F)
2010-09-25Record daily precipitationRecord daily precipitation 117.9 mm (4.6 in)
2010-11-05Record low maximum temperatureRecord low maximum temperature 5.6 C (42.1 F)
2010-12-11Record low minimum temperatureRecord low minimum temperature -7.2 C (19.0 F)
2013-03-02Record low maximum temperatureRecord low maximum temperature 5.0 C (41.0 F)

Wettest Day of Each Month

Sep: 117.9 mm (4.6 in)
Record daily precipitation for each month at San Juan Chamula The wettest day on record for each calendar month at San Juan Chamula. The most was 117.9 mm (4.6 in) on 25 September 2010. 050100150 Jan: 71.9 mm (2.8 in), 9 January 2007 Jan Feb: 49.8 mm (2.0 in), 7 February 1962 Feb Mar: 47.8 mm (1.9 in), 10 March 1962 Mar Apr: 55.1 mm (2.2 in), 14 April 2008 Apr May: 58.9 mm (2.3 in), 14 May 2012 May Jun: 102.9 mm (4.1 in), 27 June 2010 Jun Jul: 74.9 mm (2.9 in), 31 July 1960 Jul Aug: 92.5 mm (3.6 in), 20 August 1973 Aug Sep: 117.9 mm (4.6 in), 25 September 2010 Sep Oct: 88.9 mm (3.5 in), 28 October 2007 Oct Nov: 58.9 mm (2.3 in), 28 November 2003 Nov Dec: 59.9 mm (2.4 in), 20 December 2001 Dec
The wettest day on record for each calendar month at San Juan Chamula. The most was 117.9 mm (4.6 in) on 25 September 2010.
Record daily precipitation for each month at San Juan Chamula
MonthRecord daily precipitation (mm)Date
Jan71.9 mm (2.8 in)9 January 2007
Feb49.8 mm (2.0 in)7 February 1962
Mar47.8 mm (1.9 in)10 March 1962
Apr55.1 mm (2.2 in)14 April 2008
May58.9 mm (2.3 in)14 May 2012
Jun102.9 mm (4.1 in)27 June 2010
Jul74.9 mm (2.9 in)31 July 1960
Aug92.5 mm (3.6 in)20 August 1973
Sep117.9 mm (4.6 in)25 September 2010
Oct88.9 mm (3.5 in)28 October 2007
Nov58.9 mm (2.3 in)28 November 2003
Dec59.9 mm (2.4 in)20 December 2001

Period of Record Coverage

1961 to 2013
Days with data per year at San Juan Chamula 47 years of record at San Juan Chamula, 1961 to 2013. 16 years have data for under 90 percent of days and are left out of rankings: 1961, 1966, 1967, 1968, 1971, 1972, 1977, 1979 and others. 1961: 266 of 365 days1962: 359 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 322 of 365 days1967: 300 of 365 days1968: 183 of 366 days1971: 184 of 365 days1972: 305 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 213 of 365 days1978: 365 of 365 days1979: 303 of 365 days1980: 182 of 366 days1981: 191 of 365 days1982: 322 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 364 of 365 days1987: 365 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 286 of 366 days1993: 365 of 365 days1994: 365 of 365 days1998: 31 of 365 days1999: 364 of 365 days2000: 366 of 366 days2001: 349 of 365 days2002: 365 of 365 days2003: 338 of 365 days2004: 329 of 366 days2006: 51 of 365 days2007: 352 of 365 days2008: 349 of 366 days2009: 352 of 365 days2010: 359 of 365 days2011: 363 of 365 days2012: 365 of 366 days2013: 179 of 365 days1980199020002010
47 years of record at San Juan Chamula, 1961 to 2013. 16 years have data for under 90 percent of days and are left out of rankings: 1961, 1966, 1967, 1968, 1971, 1972, 1977, 1979 and others.
Days with data per year at San Juan Chamula
YearDays with dataShare of yearComplete
196126673%No
196235998%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
196632288%No
196730082%No
196818350%No
197118450%No
197230583%No
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
197721358%No
1978365100%Yes
197930383%No
198018250%No
198119152%No
198232288%No
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986364100%Yes
1987365100%Yes
1988365100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
199228678%No
1993365100%Yes
1994365100%Yes
1998318%No
1999364100%Yes
2000366100%Yes
200134996%Yes
2002365100%Yes
200333893%Yes
200432990%No
20065114%No
200735296%Yes
200834995%Yes
200935296%Yes
201035998%Yes
201136399%Yes
2012365100%Yes
201317949%No

Latest Records

20
Latest records at San Juan Chamula
DateStationRecordValueBeat old record byOld record stoodSignificance
29 June 2013San Juan Chamula, MXdaily rain32.8 mm (1.3 in)15.0 mm (0.6 in)46 years29 of 100 (Routine)
11 June 2013San Juan Chamula, MXdaily low min1.7 C (35.1 F)1.1 C (2.0 F)11 years12 of 100 (Routine)
7 June 2013San Juan Chamula, MXdaily low max15.6 C (60.1 F)1.1 C (2.0 F)28 years17 of 100 (Routine)
30 May 2013San Juan Chamula, MXdaily low max (Tie)13.9 C (57.0 F)tie11 years2 of 100 (Routine)
29 May 2013San Juan Chamula, MXdaily rain45.7 mm (1.8 in)3.8 mm (0.15 in)28 years16 of 100 (Routine)
29 May 2013San Juan Chamula, MXdaily low max13.9 C (57.0 F)1.7 C (3.1 F)11 years14 of 100 (Routine)
28 May 2013San Juan Chamula, MXdaily low max (Tie)15.0 C (59.0 F)tie4 years1 of 100 (Routine)
27 May 2013San Juan Chamula, MXdaily low max15.6 C (60.1 F)1.1 C (2.0 F)11 years12 of 100 (Routine)
23 May 2013San Juan Chamula, MXdaily low max (Tie)15.6 C (60.1 F)tie32 years3 of 100 (Routine)
15 May 2013San Juan Chamula, MXdaily low min1.1 C (34.0 F)0.6 C (1.1 F)50 years22 of 100 (Routine)
14 May 2013San Juan Chamula, MXdaily low max17.2 C (63.0 F)0.6 C (1.1 F)51 years22 of 100 (Routine)
12 May 2013San Juan Chamula, MXdaily low max (Tie)18.9 C (66.0 F)tie28 years3 of 100 (Routine)
10 May 2013San Juan Chamula, MXdaily low min0.0 C (32.0 F)1.7 C (3.1 F)48 years24 of 100 (Routine)
3 May 2013San Juan Chamula, MXdaily low max12.8 C (55.0 F)3.9 C (7.0 F)8 years21 of 100 (Routine)
3 May 2013San Juan Chamula, MXdaily high min (Tie)10.0 C (50.0 F)tie40 years4 of 100 (Routine)
27 April 2013San Juan Chamula, MXdaily rain3.6 mm (0.14 in)1.3 mm (0.05 in)20 years12 of 100 (Routine)
1 April 2013San Juan Chamula, MXdaily low min (Tie)-3.3 C (26.1 F)tie12 years2 of 100 (Routine)
30 March 2013San Juan Chamula, MXdaily low min-1.1 C (30.0 F)0.5 C (0.9 F)10 years9 of 100 (Routine)
28 March 2013San Juan Chamula, MXdaily low max (Tie)16.7 C (62.1 F)tie0 years1 of 100 (Routine)
27 March 2013San Juan Chamula, MXdaily low max12.8 C (55.0 F)1.1 C (2.0 F)35 years18 of 100 (Routine)

Climate Trend

29 complete years, 1962 to 2012
Annual mean temperature at San Juan Chamula as warming stripes, 1962 to 2012 One stripe for each of 29 complete years at San Juan Chamula, 1962 to 2012. Blue stripes are years cooler than the station's own mean of 13.3 C (55.9 F); red stripes are warmer. The coolest year was 2012, at 11.2 C (52.2 F), and the warmest was 1983, at 14.6 C (58.3 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1962: 13.8 C, +0.5 C from the station mean1963: 13.9 C, +0.7 C from the station mean1964: 13.2 C, -0.1 C from the station mean1965: 13.8 C, +0.6 C from the station mean1973: 13.5 C, +0.3 C from the station mean1974: 12.9 C, -0.4 C from the station mean1975: 13.1 C, -0.1 C from the station mean1976: 13.1 C, -0.1 C from the station mean1978: 13.8 C, +0.5 C from the station mean1983: 14.6 C, +1.3 C from the station mean1984: 14.1 C, +0.8 C from the station mean1985: 13.9 C, +0.7 C from the station mean1986: 13.7 C, +0.4 C from the station mean1987: 13.4 C, +0.1 C from the station mean1988: 13.8 C, +0.5 C from the station mean1989: 13.7 C, +0.4 C from the station mean1990: 14.1 C, +0.8 C from the station mean1991: 14.2 C, +1.0 C from the station mean1993: 14.3 C, +1.1 C from the station mean1994: 14.4 C, +1.1 C from the station mean1999: 13.8 C, +0.6 C from the station mean2000: 12.9 C, -0.4 C from the station mean2002: 11.8 C, -1.5 C from the station mean2007: 12.2 C, -1.1 C from the station mean2008: 12.1 C, -1.2 C from the station mean2009: 11.8 C, -1.5 C from the station mean2010: 12.1 C, -1.2 C from the station mean2011: 11.5 C, -1.7 C from the station mean2012: 11.2 C, -2.0 C from the station mean19621965197019751980198519901995200020052010
One stripe for each of 29 complete years at San Juan Chamula, 1962 to 2012. Blue stripes are years cooler than the station's own mean of 13.3 C (55.9 F); red stripes are warmer. The coolest year was 2012, at 11.2 C (52.2 F), and the warmest was 1983, at 14.6 C (58.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at San Juan Chamula as warming stripes, 1962 to 2012
YearAnnual mean temperatureDifference from the station mean
196213.8 C+0.52 C
196313.9 C+0.67 C
196413.2 C-0.08 C
196513.8 C+0.57 C
197313.5 C+0.27 C
197412.9 C-0.38 C
197513.1 C-0.14 C
197613.1 C-0.13 C
197813.8 C+0.54 C
198314.6 C+1.33 C
198414.1 C+0.82 C
198513.9 C+0.67 C
198613.7 C+0.38 C
198713.4 C+0.09 C
198813.8 C+0.52 C
198913.7 C+0.40 C
199014.1 C+0.78 C
199114.2 C+0.97 C
199314.3 C+1.07 C
199414.4 C+1.09 C
199913.8 C+0.56 C
200012.9 C-0.39 C
200211.8 C-1.52 C
200712.2 C-1.06 C
200812.1 C-1.21 C
200911.8 C-1.47 C
201012.1 C-1.17 C
201111.5 C-1.75 C
201211.2 C-2.03 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

1956 to 2013
Yearly extremes at San Juan Chamula: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)30.0 C (86.0 F)196427.8 C (82.0 F)47
Coldest night (TNn)-7.2 C (19.0 F)2010-2.2 C (28.0 F)47
Wettest day (Rx1day)117.9 mm (4.6 in)201054.7 mm (2.2 in)54
Wettest five days (Rx5day)272.8 mm (10.7 in)1973115.1 mm (4.5 in)54
Longest dry spell (CDD)70 days198329 days54

Hottest day (TXx)

Hottest day (TXx) at San Juan Chamula by year The hottest day of the year at San Juan Chamula, 1956 to 2013. The record is 30.0 C (86.0 F) in 1964, marked on the chart; the median year is 27.8 C (82.0 F). 2022.52527.530196019701980199020002010Record: 30.0 C (86.0 F) in 1964
The hottest day of the year at San Juan Chamula, 1956 to 2013. The record is 30.0 C (86.0 F) in 1964, marked on the chart; the median year is 27.8 C (82.0 F).
Hottest day (TXx) at San Juan Chamula by year
YearHottest day (TXx)
1956n/a
1958n/a
1959n/a
1960n/a
196127.8 C (82.0 F)
196225.6 C (78.1 F)
196328.9 C (84.0 F)
196430.0 C (86.0 F)
196530.0 C (86.0 F)
196627.8 C (82.0 F)
196730.0 C (86.0 F)
196826.7 C (80.1 F)
197128.9 C (84.0 F)
197229.4 C (84.9 F)
197329.4 C (84.9 F)
197426.1 C (79.0 F)
197525.0 C (77.0 F)
197625.0 C (77.0 F)
197724.4 C (75.9 F)
197827.8 C (82.0 F)
197927.8 C (82.0 F)
198025.6 C (78.1 F)
198130.0 C (86.0 F)
198226.7 C (80.1 F)
198327.8 C (82.0 F)
198428.3 C (82.9 F)
198525.0 C (77.0 F)
198625.6 C (78.1 F)
198728.3 C (82.9 F)
198828.3 C (82.9 F)
198925.6 C (78.1 F)
199025.6 C (78.1 F)
199128.3 C (82.9 F)
199226.7 C (80.1 F)
199326.7 C (80.1 F)
199428.9 C (84.0 F)
1995n/a
1996n/a
1997n/a
199820.6 C (69.1 F)
199928.9 C (84.0 F)
200028.9 C (84.0 F)
200130.0 C (86.0 F)
200226.7 C (80.1 F)
200327.8 C (82.0 F)
200427.8 C (82.0 F)
200622.8 C (73.0 F)
200730.0 C (86.0 F)
200830.0 C (86.0 F)
200925.0 C (77.0 F)
201023.9 C (75.0 F)
201122.8 C (73.0 F)
201222.8 C (73.0 F)
201323.9 C (75.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Juan Chamula by year The coldest night of the year at San Juan Chamula, 1956 to 2013. The record is -7.2 C (19.0 F) in 2010, marked on the chart; the median year is -2.2 C (28.0 F). -7.5-5-2.502.5196019701980199020002010Record: -7.2 C (19.0 F) in 2010
The coldest night of the year at San Juan Chamula, 1956 to 2013. The record is -7.2 C (19.0 F) in 2010, marked on the chart; the median year is -2.2 C (28.0 F).
Coldest night (TNn) at San Juan Chamula by year
YearColdest night (TNn)
1956n/a
1958n/a
1959n/a
1960n/a
19610.0 C (32.0 F)
19620.0 C (32.0 F)
19630.6 C (33.1 F)
19640.0 C (32.0 F)
19650.0 C (32.0 F)
1966-1.1 C (30.0 F)
1967-5.6 C (21.9 F)
1968-3.9 C (25.0 F)
1971-2.8 C (27.0 F)
19720.0 C (32.0 F)
1973-5.0 C (23.0 F)
1974-2.2 C (28.0 F)
1975-3.3 C (26.1 F)
1976-4.4 C (24.1 F)
1977-2.2 C (28.0 F)
19780.0 C (32.0 F)
19790.0 C (32.0 F)
19801.7 C (35.1 F)
1981-5.0 C (23.0 F)
19820.6 C (33.1 F)
19830.0 C (32.0 F)
19840.6 C (33.1 F)
1985-2.2 C (28.0 F)
1986-1.1 C (30.0 F)
1987-5.0 C (23.0 F)
1988-5.0 C (23.0 F)
1989-5.0 C (23.0 F)
1990-1.1 C (30.0 F)
19910.0 C (32.0 F)
1992-2.8 C (27.0 F)
1993-2.2 C (28.0 F)
1994-2.2 C (28.0 F)
1995n/a
1996n/a
1997n/a
19980.6 C (33.1 F)
1999-6.1 C (21.0 F)
2000-5.0 C (23.0 F)
2001-1.1 C (30.0 F)
2002-0.6 C (30.9 F)
2003-2.8 C (27.0 F)
2004-4.4 C (24.1 F)
2006-6.1 C (21.0 F)
2007-4.4 C (24.1 F)
2008-4.4 C (24.1 F)
2009-5.0 C (23.0 F)
2010-7.2 C (19.0 F)
2011-4.4 C (24.1 F)
2012-7.2 C (19.0 F)
2013-4.4 C (24.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Juan Chamula by year The wettest day of the year at San Juan Chamula, 1956 to 2013. The record is 117.9 mm (4.6 in) in 2010, marked on the chart; the median year is 54.7 mm (2.2 in). 050100150196019701980199020002010Record: 117.9 mm (4.6 in) in 2010
The wettest day of the year at San Juan Chamula, 1956 to 2013. The record is 117.9 mm (4.6 in) in 2010, marked on the chart; the median year is 54.7 mm (2.2 in).
Wettest day (Rx1day) at San Juan Chamula by year
YearWettest day (Rx1day)
195622.4 mm (0.9 in)
195859.2 mm (2.3 in)
195943.4 mm (1.7 in)
196074.9 mm (2.9 in)
196159.9 mm (2.4 in)
196249.8 mm (2.0 in)
196359.9 mm (2.4 in)
196446.0 mm (1.8 in)
196553.8 mm (2.1 in)
196663.8 mm (2.5 in)
196759.9 mm (2.4 in)
196836.8 mm (1.4 in)
197140.9 mm (1.6 in)
197238.9 mm (1.5 in)
197392.5 mm (3.6 in)
1974105.4 mm (4.1 in)
197581.8 mm (3.2 in)
197644.5 mm (1.8 in)
197779.0 mm (3.1 in)
197879.8 mm (3.1 in)
197940.9 mm (1.6 in)
198039.9 mm (1.6 in)
198140.9 mm (1.6 in)
198234.3 mm (1.4 in)
198384.8 mm (3.3 in)
198441.9 mm (1.6 in)
198590.9 mm (3.6 in)
198653.8 mm (2.1 in)
198760.2 mm (2.4 in)
198846.5 mm (1.8 in)
198997.8 mm (3.9 in)
199057.9 mm (2.3 in)
199172.9 mm (2.9 in)
199248.3 mm (1.9 in)
199351.3 mm (2.0 in)
199480.0 mm (3.1 in)
199538.9 mm (1.5 in)
199640.1 mm (1.6 in)
19976.9 mm (0.27 in)
199854.9 mm (2.2 in)
199955.6 mm (2.2 in)
200049.8 mm (2.0 in)
200165.3 mm (2.6 in)
200240.9 mm (1.6 in)
200358.9 mm (2.3 in)
200454.4 mm (2.1 in)
200617.8 mm (0.7 in)
200788.9 mm (3.5 in)
200889.9 mm (3.5 in)
200943.9 mm (1.7 in)
2010117.9 mm (4.6 in)
201157.9 mm (2.3 in)
201265.8 mm (2.6 in)
201345.7 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Juan Chamula by year The wettest five days of the year at San Juan Chamula, 1956 to 2013. The record is 272.8 mm (10.7 in) in 1973, marked on the chart; the median year is 115.1 mm (4.5 in). 0100200300196019701980199020002010Record: 272.8 mm (10.7 in) in 1973
The wettest five days of the year at San Juan Chamula, 1956 to 2013. The record is 272.8 mm (10.7 in) in 1973, marked on the chart; the median year is 115.1 mm (4.5 in).
Wettest five days (Rx5day) at San Juan Chamula by year
YearWettest five days (Rx5day)
195637.4 mm (1.5 in)
1958162.1 mm (6.4 in)
1959106.9 mm (4.2 in)
1960184.6 mm (7.3 in)
196191.2 mm (3.6 in)
1962140.2 mm (5.5 in)
1963127.3 mm (5.0 in)
196480.6 mm (3.2 in)
196572.6 mm (2.9 in)
1966115.3 mm (4.5 in)
1967116.6 mm (4.6 in)
196856.4 mm (2.2 in)
197176.5 mm (3.0 in)
197288.6 mm (3.5 in)
1973272.8 mm (10.7 in)
1974176.3 mm (6.9 in)
1975132.9 mm (5.2 in)
1976122.4 mm (4.8 in)
1977127.7 mm (5.0 in)
1978111.5 mm (4.4 in)
197976.1 mm (3.0 in)
198066.6 mm (2.6 in)
1981107.7 mm (4.2 in)
198280.2 mm (3.2 in)
1983107.2 mm (4.2 in)
198472.2 mm (2.8 in)
1985133.4 mm (5.3 in)
1986110.2 mm (4.3 in)
1987114.8 mm (4.5 in)
1988107.5 mm (4.2 in)
1989207.5 mm (8.2 in)
1990146.3 mm (5.8 in)
1991120.8 mm (4.8 in)
1992125.0 mm (4.9 in)
1993117.1 mm (4.6 in)
199498.3 mm (3.9 in)
199567.7 mm (2.7 in)
1996112.5 mm (4.4 in)
199711.5 mm (0.5 in)
1998160.3 mm (6.3 in)
1999128.6 mm (5.1 in)
2000162.9 mm (6.4 in)
2001141.8 mm (5.6 in)
2002103.2 mm (4.1 in)
200373.2 mm (2.9 in)
200460.0 mm (2.4 in)
200628.3 mm (1.1 in)
2007153.7 mm (6.1 in)
2008145.4 mm (5.7 in)
2009128.0 mm (5.0 in)
2010222.8 mm (8.8 in)
2011135.2 mm (5.3 in)
2012164.7 mm (6.5 in)
201397.5 mm (3.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Juan Chamula by year The longest dry spell of the year at San Juan Chamula, 1956 to 2013. The record is 70 days in 1983, marked on the chart; the median year is 29 days. 020406080196019701980199020002010Record: 70 days in 1983
The longest dry spell of the year at San Juan Chamula, 1956 to 2013. The record is 70 days in 1983, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at San Juan Chamula by year
YearLongest dry spell (CDD)
195616 days
195833 days
195925 days
196019 days
196130 days
196231 days
196327 days
196439 days
196527 days
196621 days
196735 days
196828 days
197124 days
197244 days
197340 days
197425 days
197529 days
197627 days
197723 days
197832 days
197948 days
198029 days
198118 days
198216 days
198370 days
198443 days
198520 days
198619 days
198731 days
198822 days
198930 days
199051 days
199129 days
199236 days
199329 days
199430 days
19959 days
199626 days
199731 days
199841 days
199926 days
200034 days
200123 days
200237 days
200346 days
200467 days
200620 days
200733 days
200836 days
200932 days
201019 days
201121 days
201237 days
201312 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.

Frost Dates and Growing Season

21 years with a frost

Across 21 years with a frost, the median last spring frost at San Juan Chamula falls on 16 March and the median first autumn frost on 3 November, which leaves a median of 233 days between them.

Frost dates and growing season at San Juan Chamula
MeasureMedian, all yearsEarliest periodRecent period (1962 to 2012)Recent against earliestFitted trend
Last spring frost16 Marchn/a16 Marchn/an/a
First autumn frost3 Novembern/a3 Novembern/an/a
Growing days233 daysn/a233 daysn/an/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

37 years, 1958 to 2012

A day with at least 60.4 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 138.8 mm (5.5 in) of rain is expected about once in 100 years.

Rainfall return levels at San Juan Chamula: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years60.4 mm (2.4 in)
5 years78.5 mm (3.1 in)
10 years91.6 mm (3.6 in)
25 years109.4 mm (4.3 in)
50 years123.7 mm (4.9 in)Longer than the 37 years of record
100 years138.8 mm (5.5 in)Longer than the 37 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, 37 years of values from 1958 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: 117.9 mm (4.6 in) in 2010; 105.4 mm (4.1 in) in 1974; 97.8 mm (3.9 in) in 1989.

Download the Data

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