Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

Zapotitlan Salinas (Smn) Weather Records (MXN00021109)

Record envelope, standing records and threshold days for Zapotitlan Salinas (Smn) (MXN00021109), Mexico, with 68 years of record.

Key Facts for Zapotitlan Salinas (Smn)

  • Zapotitlan Salinas (Smn) (MXN00021109) is a weather station in Mexico at 18.32 latitude and -97.47 longitude, 1,500 m (4,921 ft) above sea level.
  • The station reports from 1942 to 2009, 68 years of record.
  • 1,464 records set at Zapotitlan Salinas (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Zapotitlan Salinas (Smn) set a daily record high maximum temperature of 32.8 C (91.0 F) on 28 December 2009.

About the Station

  • Location: Mexico, 18.32 latitude, -97.47 longitude.
  • Elevation: 1,500 m (4,921 ft).
  • Period of record: 1942 to 2009, 68 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 Zapotitlan Salinas (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Zapotitlan Salinas (Smn). 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 Zapotitlan Salinas (Smn). 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 Zapotitlan Salinas (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan36.1 C (97.0 F)-5.0 C (23.0 F)n/an/a
Feb36.7 C (98.1 F)0.6 C (33.1 F)n/an/a
Mar40.0 C (104.0 F)1.7 C (35.1 F)n/an/a
Apr41.7 C (107.1 F)0.6 C (33.1 F)n/an/a
May41.7 C (107.1 F)7.8 C (46.0 F)n/an/a
Jun40.6 C (105.1 F)10.0 C (50.0 F)n/an/a
Jul38.9 C (102.0 F)10.0 C (50.0 F)n/an/a
Aug40.0 C (104.0 F)10.0 C (50.0 F)n/an/a
Sep38.9 C (102.0 F)10.0 C (50.0 F)n/an/a
Oct38.9 C (102.0 F)0.6 C (33.1 F)n/an/a
Nov35.6 C (96.1 F)0.0 C (32.0 F)n/an/a
Dec36.7 C (98.1 F)0.0 C (32.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Zapotitlan Salinas (Smn) by the year they were set 1,464 records at Zapotitlan Salinas (Smn) still stand. 1958 holds the most, with 61. 0204060801955: 491956: 451957: 561958: 611959: 411960: 491961: 211962: 391963: 331964: 461965: 401966: 331967: 271968: 371969: 371970: 331971: 331987: 301988: 441989: 561990: 161991: 211992: 381993: 231994: 281995: 221996: 271997: 301998: 11999: 462000: 362001: 222002: 262004: 412005: 502006: 572007: 532008: 562009: 611955195919631967197119901994199820022007
1,464 records at Zapotitlan Salinas (Smn) still stand. 1958 holds the most, with 61.
Standing records at Zapotitlan Salinas (Smn) by the year they were set
Year setStanding records
195549
195645
195756
195861
195941
196049
196121
196239
196333
196446
196540
196633
196727
196837
196937
197033
197133
198730
198844
198956
199016
199121
199238
199323
199428
199522
199627
199730
19981
199946
200036
200122
200226
200441
200550
200657
200753
200856
200961

All-Time Record Progression

3 new records
When Zapotitlan Salinas (Smn) set new all-time records 3 all-time records were set at Zapotitlan Salinas (Smn) between 3 May 2002 and 6 January 2006. Each dot is a new record. Record high maximum temperatureRecord low maximum temperature3 May 2002: Record high maximum temperature 40.6 C (105.1 F)29 April 2005: Record high maximum temperature 41.7 C (107.1 F)6 January 2006: Record low maximum temperature 10.6 C (51.1 F)2005
3 all-time records were set at Zapotitlan Salinas (Smn) between 3 May 2002 and 6 January 2006. Each dot is a new record.
When Zapotitlan Salinas (Smn) set new all-time records
DateKindDetail
2002-05-03Record high maximum temperatureRecord high maximum temperature 40.6 C (105.1 F)
2005-04-29Record high maximum temperatureRecord high maximum temperature 41.7 C (107.1 F)
2006-01-06Record low maximum temperatureRecord low maximum temperature 10.6 C (51.1 F)

Wettest Day of Each Month

Sep: 95.8 mm (3.8 in)
Record daily precipitation for each month at Zapotitlan Salinas (Smn) The wettest day on record for each calendar month at Zapotitlan Salinas (Smn). The most was 95.8 mm (3.8 in) on 11 September 1955. 0255075100 Jan: 24.4 mm (1.0 in), 19 January 1958 Jan Feb: 17.3 mm (0.7 in), 23 February 1957 Feb Mar: 24.9 mm (1.0 in), 18 March 1969 Mar Apr: 37.8 mm (1.5 in), 27 April 1968 Apr May: 86.9 mm (3.4 in), 30 May 1987 May Jun: 71.9 mm (2.8 in), 30 June 1964 Jun Jul: 74.9 mm (2.9 in), 7 July 1996 Jul Aug: 72.9 mm (2.9 in), 10 August 1963 Aug Sep: 95.8 mm (3.8 in), 11 September 1955 Sep Oct: 83.8 mm (3.3 in), 8 October 1950 Oct Nov: 37.3 mm (1.5 in), 29 November 1956 Nov Dec: 25.9 mm (1.0 in), 26 December 2001 Dec
The wettest day on record for each calendar month at Zapotitlan Salinas (Smn). The most was 95.8 mm (3.8 in) on 11 September 1955.
Record daily precipitation for each month at Zapotitlan Salinas (Smn)
MonthRecord daily precipitation (mm)Date
Jan24.4 mm (1.0 in)19 January 1958
Feb17.3 mm (0.7 in)23 February 1957
Mar24.9 mm (1.0 in)18 March 1969
Apr37.8 mm (1.5 in)27 April 1968
May86.9 mm (3.4 in)30 May 1987
Jun71.9 mm (2.8 in)30 June 1964
Jul74.9 mm (2.9 in)7 July 1996
Aug72.9 mm (2.9 in)10 August 1963
Sep95.8 mm (3.8 in)11 September 1955
Oct83.8 mm (3.3 in)8 October 1950
Nov37.3 mm (1.5 in)29 November 1956
Dec25.9 mm (1.0 in)26 December 2001

Period of Record Coverage

1955 to 2009
Days with data per year at Zapotitlan Salinas (Smn) 39 years of record at Zapotitlan Salinas (Smn), 1955 to 2009. 8 years have data for under 90 percent of days and are left out of rankings: 1955, 1987, 1988, 1990, 1991, 1996, 1998, 2006. 1955: 254 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 335 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 362 of 365 days1968: 366 of 366 days1969: 359 of 365 days1970: 365 of 365 days1971: 364 of 365 days1987: 275 of 365 days1988: 213 of 366 days1989: 334 of 365 days1990: 242 of 365 days1991: 120 of 365 days1992: 366 of 366 days1993: 337 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 305 of 366 days1997: 364 of 365 days1998: 31 of 365 days1999: 333 of 365 days2000: 335 of 366 days2001: 364 of 365 days2002: 362 of 365 days2004: 335 of 366 days2005: 365 of 365 days2006: 303 of 365 days2007: 332 of 365 days2008: 362 of 366 days2009: 363 of 365 days19551960196519701990199520002005
39 years of record at Zapotitlan Salinas (Smn), 1955 to 2009. 8 years have data for under 90 percent of days and are left out of rankings: 1955, 1987, 1988, 1990, 1991, 1996, 1998, 2006.
Days with data per year at Zapotitlan Salinas (Smn)
YearDays with dataShare of yearComplete
195525470%No
1956366100%Yes
1957365100%Yes
1958365100%Yes
195933592%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964365100%Yes
1965365100%Yes
1966365100%Yes
196736299%Yes
1968366100%Yes
196935998%Yes
1970365100%Yes
1971364100%Yes
198727575%No
198821358%No
198933492%Yes
199024266%No
199112033%No
1992366100%Yes
199333792%Yes
1994365100%Yes
1995365100%Yes
199630583%No
1997364100%Yes
1998318%No
199933391%Yes
200033592%Yes
2001364100%Yes
200236299%Yes
200433592%Yes
2005365100%Yes
200630383%No
200733291%Yes
200836299%Yes
200936399%Yes

Latest Records

20
Latest records at Zapotitlan Salinas (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
28 December 2009Zapotitlan Salinas (Smn), MXdaily high max32.8 C (91.0 F)1.1 C (2.0 F)20 years14 of 100 (Routine)
27 December 2009Zapotitlan Salinas (Smn), MXdaily high max (Tie)30.6 C (87.1 F)tie20 years2 of 100 (Routine)
19 December 2009Zapotitlan Salinas (Smn), MXdaily high min (Tie)11.7 C (53.1 F)tie52 years5 of 100 (Routine)
18 December 2009Zapotitlan Salinas (Smn), MXdaily high max (Tie)31.7 C (89.1 F)tie20 years2 of 100 (Routine)
16 December 2009Zapotitlan Salinas (Smn), MXdaily high max31.7 C (89.1 F)1.1 C (2.0 F)48 years22 of 100 (Routine)
4 December 2009Zapotitlan Salinas (Smn), MXdaily low min (Tie)5.0 C (41.0 F)tie48 years4 of 100 (Routine)
29 November 2009Zapotitlan Salinas (Smn), MXdaily high min15.6 C (60.1 F)0.6 C (1.1 F)46 years20 of 100 (Routine)
24 November 2009Zapotitlan Salinas (Smn), MXdaily high min15.6 C (60.1 F)0.6 C (1.1 F)52 years22 of 100 (Routine)
24 November 2009Zapotitlan Salinas (Smn), MXdaily high max (Tie)32.8 C (91.0 F)tie20 years2 of 100 (Routine)
19 November 2009Zapotitlan Salinas (Smn), MXdaily high min (Tie)15.6 C (60.1 F)tie40 years4 of 100 (Routine)
18 November 2009Zapotitlan Salinas (Smn), MXdaily low max (Tie)22.8 C (73.0 F)tie50 years5 of 100 (Routine)
14 November 2009Zapotitlan Salinas (Smn), MXdaily high min (Tie)15.0 C (59.0 F)tie48 years4 of 100 (Routine)
13 November 2009Zapotitlan Salinas (Smn), MXmonthly high min (Tie)20.0 C (68.0 F)tie1 year3 of 100 (Routine)
12 November 2009Zapotitlan Salinas (Smn), MXdaily high min17.8 C (64.0 F)2.2 C (4.0 F)48 years26 of 100 (Routine)
11 November 2009Zapotitlan Salinas (Smn), MXdaily high min15.6 C (60.1 F)0.6 C (1.1 F)52 years22 of 100 (Routine)
26 October 2009Zapotitlan Salinas (Smn), MXdaily high max (Tie)33.9 C (93.0 F)tie14 years2 of 100 (Routine)
25 October 2009Zapotitlan Salinas (Smn), MXdaily high max (Tie)35.0 C (95.0 F)tie3 years1 of 100 (Routine)
24 October 2009Zapotitlan Salinas (Smn), MXdaily high max35.0 C (95.0 F)2.2 C (4.0 F)48 years26 of 100 (Routine)
10 October 2009Zapotitlan Salinas (Smn), MXdaily high max (Tie)33.9 C (93.0 F)tie2 years1 of 100 (Routine)
9 October 2009Zapotitlan Salinas (Smn), MXdaily high max35.6 C (96.1 F)1.7 C (3.1 F)7 years12 of 100 (Routine)

Climate Trend

24 complete years, 1956 to 2009
Annual mean temperature at Zapotitlan Salinas (Smn) as warming stripes, 1956 to 2009 One stripe for each of 24 complete years at Zapotitlan Salinas (Smn), 1956 to 2009. Blue stripes are years cooler than the station's own mean of 21.4 C (70.6 F); red stripes are warmer. The coolest year was 2001, at 19.9 C (67.8 F), and the warmest was 2009, at 23.1 C (73.6 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1956: 20.6 C, -0.8 C from the station mean1957: 21.7 C, +0.3 C from the station mean1958: 21.3 C, -0.1 C from the station mean1960: 21.3 C, -0.1 C from the station mean1961: 21.5 C, +0.1 C from the station mean1962: 21.6 C, +0.2 C from the station mean1963: 21.4 C, 0.0 C from the station mean1964: 21.9 C, +0.5 C from the station mean1965: 21.5 C, 0.0 C from the station mean1966: 21.2 C, -0.2 C from the station mean1967: 21.0 C, -0.4 C from the station mean1968: 21.1 C, -0.3 C from the station mean1969: 21.9 C, +0.4 C from the station mean1970: 21.0 C, -0.4 C from the station mean1971: 21.1 C, -0.3 C from the station mean1992: 20.9 C, -0.5 C from the station mean1994: 21.1 C, -0.3 C from the station mean1995: 21.2 C, -0.2 C from the station mean1997: 20.6 C, -0.8 C from the station mean2001: 19.9 C, -1.5 C from the station mean2002: 21.4 C, 0.0 C from the station mean2005: 23.1 C, +1.6 C from the station mean2008: 22.8 C, +1.3 C from the station mean2009: 23.1 C, +1.7 C from the station mean19561960196519701975198019851990199520002005
One stripe for each of 24 complete years at Zapotitlan Salinas (Smn), 1956 to 2009. Blue stripes are years cooler than the station's own mean of 21.4 C (70.6 F); red stripes are warmer. The coolest year was 2001, at 19.9 C (67.8 F), and the warmest was 2009, at 23.1 C (73.6 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Zapotitlan Salinas (Smn) as warming stripes, 1956 to 2009
YearAnnual mean temperatureDifference from the station mean
195620.6 C-0.84 C
195721.7 C+0.29 C
195821.3 C-0.11 C
196021.3 C-0.14 C
196121.5 C+0.05 C
196221.6 C+0.21 C
196321.4 C-0.01 C
196421.9 C+0.48 C
196521.5 C+0.04 C
196621.2 C-0.25 C
196721.0 C-0.43 C
196821.1 C-0.33 C
196921.9 C+0.44 C
197021.0 C-0.40 C
197121.1 C-0.32 C
199220.9 C-0.50 C
199421.1 C-0.33 C
199521.2 C-0.22 C
199720.6 C-0.81 C
200119.9 C-1.53 C
200221.4 C+0.01 C
200523.1 C+1.63 C
200822.8 C+1.34 C
200923.1 C+1.67 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

1942 to 2009
Yearly extremes at Zapotitlan Salinas (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.7 C (107.1 F)200537.8 C (100.0 F)39
Coldest night (TNn)-5.0 C (23.0 F)19561.7 C (35.1 F)39
Wettest day (Rx1day)95.8 mm (3.8 in)195541.9 mm (1.6 in)52
Wettest five days (Rx5day)205.1 mm (8.1 in)195573.4 mm (2.9 in)52
Longest dry spell (CDD)133 days197079 days52

Hottest day (TXx)

Hottest day (TXx) at Zapotitlan Salinas (Smn) by year The hottest day of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 41.7 C (107.1 F) in 2005, marked on the chart; the median year is 37.8 C (100.0 F). 30354045196019802000Record: 41.7 C (107.1 F) in 2005
The hottest day of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 41.7 C (107.1 F) in 2005, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Zapotitlan Salinas (Smn) by year
YearHottest day (TXx)
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
195538.9 C (102.0 F)
195636.7 C (98.1 F)
195737.8 C (100.0 F)
195837.8 C (100.0 F)
195936.7 C (98.1 F)
196037.8 C (100.0 F)
196137.8 C (100.0 F)
196237.8 C (100.0 F)
196336.7 C (98.1 F)
196438.9 C (102.0 F)
196537.8 C (100.0 F)
196637.8 C (100.0 F)
196736.7 C (98.1 F)
196836.7 C (98.1 F)
196938.9 C (102.0 F)
197037.8 C (100.0 F)
197138.9 C (102.0 F)
198738.9 C (102.0 F)
198835.6 C (96.1 F)
198937.8 C (100.0 F)
199037.8 C (100.0 F)
199140.0 C (104.0 F)
199236.7 C (98.1 F)
199335.6 C (96.1 F)
199436.7 C (98.1 F)
199536.7 C (98.1 F)
199635.0 C (95.0 F)
199735.6 C (96.1 F)
199830.6 C (87.1 F)
199935.0 C (95.0 F)
200035.0 C (95.0 F)
200135.6 C (96.1 F)
200240.6 C (105.1 F)
200440.0 C (104.0 F)
200541.7 C (107.1 F)
200641.7 C (107.1 F)
200740.6 C (105.1 F)
200841.7 C (107.1 F)
200941.7 C (107.1 F)

Coldest night (TNn)

Coldest night (TNn) at Zapotitlan Salinas (Smn) by year The coldest night of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is -5.0 C (23.0 F) in 1956, marked on the chart; the median year is 1.7 C (35.1 F). -50510196019802000Record: -5.0 C (23.0 F) in 1956
The coldest night of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is -5.0 C (23.0 F) in 1956, marked on the chart; the median year is 1.7 C (35.1 F).
Coldest night (TNn) at Zapotitlan Salinas (Smn) by year
YearColdest night (TNn)
1942n/a
1943n/a
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
19550.0 C (32.0 F)
1956-5.0 C (23.0 F)
19571.7 C (35.1 F)
19581.7 C (35.1 F)
19592.8 C (37.0 F)
19600.0 C (32.0 F)
19610.6 C (33.1 F)
19621.7 C (35.1 F)
19630.0 C (32.0 F)
19645.0 C (41.0 F)
19652.8 C (37.0 F)
19660.0 C (32.0 F)
19670.6 C (33.1 F)
19681.7 C (35.1 F)
19693.9 C (39.0 F)
19700.0 C (32.0 F)
19710.6 C (33.1 F)
19870.0 C (32.0 F)
19882.8 C (37.0 F)
19891.7 C (35.1 F)
19902.8 C (37.0 F)
19911.7 C (35.1 F)
19920.6 C (33.1 F)
19931.7 C (35.1 F)
19943.9 C (39.0 F)
19952.8 C (37.0 F)
19960.0 C (32.0 F)
19970.0 C (32.0 F)
19980.6 C (33.1 F)
19990.6 C (33.1 F)
20000.0 C (32.0 F)
20012.8 C (37.0 F)
20021.7 C (35.1 F)
20045.6 C (42.1 F)
20052.8 C (37.0 F)
2006-2.2 C (28.0 F)
20075.0 C (41.0 F)
20080.6 C (33.1 F)
20093.9 C (39.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Zapotitlan Salinas (Smn) by year The wettest day of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 95.8 mm (3.8 in) in 1955, marked on the chart; the median year is 41.9 mm (1.6 in). 0255075100196019802000Record: 95.8 mm (3.8 in) in 1955
The wettest day of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 95.8 mm (3.8 in) in 1955, marked on the chart; the median year is 41.9 mm (1.6 in).
Wettest day (Rx1day) at Zapotitlan Salinas (Smn) by year
YearWettest day (Rx1day)
194214.7 mm (0.6 in)
19437.9 mm (0.31 in)
194447.0 mm (1.9 in)
194545.0 mm (1.8 in)
194640.9 mm (1.6 in)
194741.9 mm (1.6 in)
194848.8 mm (1.9 in)
194952.8 mm (2.1 in)
195083.8 mm (3.3 in)
195141.9 mm (1.6 in)
195230.0 mm (1.2 in)
195346.0 mm (1.8 in)
195459.9 mm (2.4 in)
195595.8 mm (3.8 in)
195648.8 mm (1.9 in)
195720.8 mm (0.8 in)
195835.8 mm (1.4 in)
195969.9 mm (2.8 in)
196027.4 mm (1.1 in)
196146.5 mm (1.8 in)
196229.0 mm (1.1 in)
196372.9 mm (2.9 in)
196471.9 mm (2.8 in)
196542.9 mm (1.7 in)
196669.3 mm (2.7 in)
196747.8 mm (1.9 in)
196843.4 mm (1.7 in)
196931.5 mm (1.2 in)
197047.8 mm (1.9 in)
197135.8 mm (1.4 in)
198786.9 mm (3.4 in)
198833.8 mm (1.3 in)
198939.9 mm (1.6 in)
199033.3 mm (1.3 in)
19915.8 mm (0.23 in)
199247.0 mm (1.9 in)
199334.8 mm (1.4 in)
199446.0 mm (1.8 in)
199551.8 mm (2.0 in)
199674.9 mm (2.9 in)
199731.0 mm (1.2 in)
19980.0 mm (0.00 in)
199969.9 mm (2.8 in)
200084.8 mm (3.3 in)
200136.8 mm (1.4 in)
200240.9 mm (1.6 in)
200431.8 mm (1.3 in)
200531.0 mm (1.2 in)
200624.9 mm (1.0 in)
200719.8 mm (0.8 in)
200841.9 mm (1.6 in)
200931.8 mm (1.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Zapotitlan Salinas (Smn) by year The wettest five days of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 205.1 mm (8.1 in) in 1955, marked on the chart; the median year is 73.4 mm (2.9 in). 0100200300196019802000Record: 205.1 mm (8.1 in) in 1955
The wettest five days of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 205.1 mm (8.1 in) in 1955, marked on the chart; the median year is 73.4 mm (2.9 in).
Wettest five days (Rx5day) at Zapotitlan Salinas (Smn) by year
YearWettest five days (Rx5day)
194220.0 mm (0.8 in)
194319.6 mm (0.8 in)
194491.7 mm (3.6 in)
194591.2 mm (3.6 in)
194650.6 mm (2.0 in)
194769.1 mm (2.7 in)
194858.4 mm (2.3 in)
194966.8 mm (2.6 in)
1950101.9 mm (4.0 in)
195146.7 mm (1.8 in)
195292.8 mm (3.7 in)
195355.9 mm (2.2 in)
195470.3 mm (2.8 in)
1955205.1 mm (8.1 in)
195664.3 mm (2.5 in)
195740.6 mm (1.6 in)
1958107.4 mm (4.2 in)
1959107.5 mm (4.2 in)
196040.6 mm (1.6 in)
196172.7 mm (2.9 in)
196267.8 mm (2.7 in)
196381.5 mm (3.2 in)
196473.2 mm (2.9 in)
196558.7 mm (2.3 in)
196688.6 mm (3.5 in)
1967112.6 mm (4.4 in)
196890.4 mm (3.6 in)
196985.4 mm (3.4 in)
197073.7 mm (2.9 in)
197160.7 mm (2.4 in)
1987116.9 mm (4.6 in)
198873.5 mm (2.9 in)
198962.3 mm (2.5 in)
199050.1 mm (2.0 in)
19917.6 mm (0.30 in)
1992107.5 mm (4.2 in)
199386.0 mm (3.4 in)
199478.3 mm (3.1 in)
199580.1 mm (3.2 in)
199689.4 mm (3.5 in)
199751.6 mm (2.0 in)
19980.0 mm (0.00 in)
1999125.1 mm (4.9 in)
2000140.4 mm (5.5 in)
200185.3 mm (3.4 in)
2002103.4 mm (4.1 in)
200451.6 mm (2.0 in)
200550.6 mm (2.0 in)
200639.7 mm (1.6 in)
200732.5 mm (1.3 in)
200876.5 mm (3.0 in)
200974.7 mm (2.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Zapotitlan Salinas (Smn) by year The longest dry spell of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 133 days in 1970, marked on the chart; the median year is 79 days. 050100150196019802000Record: 133 days in 1970
The longest dry spell of the year at Zapotitlan Salinas (Smn), 1942 to 2009. The record is 133 days in 1970, marked on the chart; the median year is 79 days.
Longest dry spell (CDD) at Zapotitlan Salinas (Smn) by year
YearLongest dry spell (CDD)
194226 days
1943115 days
194495 days
1945110 days
194653 days
194746 days
194845 days
1949121 days
1950104 days
195189 days
195261 days
1953116 days
1954105 days
1955118 days
1956111 days
195752 days
195852 days
195997 days
1960128 days
196181 days
196294 days
196395 days
1964127 days
196562 days
196673 days
196762 days
196845 days
196962 days
1970133 days
197193 days
198796 days
198861 days
198981 days
199029 days
199154 days
199256 days
1993123 days
199499 days
199542 days
199667 days
199776 days
199831 days
199954 days
200099 days
2001117 days
200257 days
200461 days
200572 days
200652 days
200738 days
2008119 days
200983 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

44 years, 1943 to 2009

A day with at least 43.0 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 102.8 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Zapotitlan Salinas (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years43.0 mm (1.7 in)
5 years59.1 mm (2.3 in)
10 years69.8 mm (2.7 in)
25 years83.1 mm (3.3 in)
50 years93.0 mm (3.7 in)Longer than the 44 years of record
100 years102.8 mm (4.0 in)Longer than the 44 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, 44 years of values from 1943 to 2009.

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: 95.8 mm (3.8 in) in 1955; 84.8 mm (3.3 in) in 2000; 83.8 mm (3.3 in) in 1950.

Download the Data

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