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

Zapotitlan de Mendez Weather Records (MXN00021108)

Record envelope, standing records and threshold days for Zapotitlan de Mendez (MXN00021108), Mexico, with 48 years of record.

Key Facts for Zapotitlan de Mendez

  • Zapotitlan de Mendez (MXN00021108) is a weather station in Mexico at 19.98 latitude and -97.72 longitude, 983 m (3,225 ft) above sea level.
  • The station reports from 1944 to 1991, 48 years of record.
  • 1,464 records set at Zapotitlan de Mendez still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Zapotitlan de Mendez set a daily record high maximum temperature of 31.7 C (89.1 F) on 31 October 1991.

About the Station

  • Location: Mexico, 19.98 latitude, -97.72 longitude.
  • Elevation: 983 m (3,225 ft).
  • Period of record: 1944 to 1991, 48 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 de Mendez, with 2026 drawn through them The band shows the record high and record low for each calendar day at Zapotitlan de Mendez. 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 Zapotitlan de Mendez. 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 de Mendez, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.6 C (96.1 F)3.9 C (39.0 F)n/an/a
Feb35.0 C (95.0 F)1.7 C (35.1 F)n/an/a
Mar40.0 C (104.0 F)5.6 C (42.1 F)n/an/a
Apr38.3 C (100.9 F)10.0 C (50.0 F)n/an/a
May38.9 C (102.0 F)10.6 C (51.1 F)n/an/a
Jun37.2 C (99.0 F)12.8 C (55.0 F)n/an/a
Jul35.0 C (95.0 F)10.6 C (51.1 F)n/an/a
Aug35.6 C (96.1 F)10.0 C (50.0 F)n/an/a
Sep35.0 C (95.0 F)10.6 C (51.1 F)n/an/a
Oct36.7 C (98.1 F)5.0 C (41.0 F)n/an/a
Nov36.7 C (98.1 F)3.9 C (39.0 F)n/an/a
Dec35.0 C (95.0 F)3.3 C (37.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Zapotitlan de Mendez by the year they were set 1,464 records at Zapotitlan de Mendez still stand. 1980 holds the most, with 139. 0501001501944: 341945: 491946: 631947: 401948: 821949: 661950: 411951: 591952: 501961: 301962: 191963: 201964: 161965: 271966: 361967: 251968: 271969: 951970: 321971: 271972: 161973: 271974: 271975: 231976: 211977: 91978: 211979: 201980: 1391981: 471982: 191983: 331984: 521985: 81986: 221987: 181988: 161989: 241990: 71991: 771944194819521964196819721976198019841988
1,464 records at Zapotitlan de Mendez still stand. 1980 holds the most, with 139.
Standing records at Zapotitlan de Mendez by the year they were set
Year setStanding records
194434
194549
194663
194740
194882
194966
195041
195159
195250
196130
196219
196320
196416
196527
196636
196725
196827
196995
197032
197127
197216
197327
197427
197523
197621
19779
197821
197920
1980139
198147
198219
198333
198452
19858
198622
198718
198816
198924
19907
199177

Wettest Day of Each Month

Oct: 259.8 mm (10.2 in)
Record daily precipitation for each month at Zapotitlan de Mendez The wettest day on record for each calendar month at Zapotitlan de Mendez. The most was 259.8 mm (10.2 in) on 1 October 1945. 0100200300 Jan: 85.9 mm (3.4 in), 3 January 1991 Jan Feb: 106.9 mm (4.2 in), 6 February 1946 Feb Mar: 103.9 mm (4.1 in), 29 March 1971 Mar Apr: 73.9 mm (2.9 in), 25 April 1947 Apr May: 140.0 mm (5.5 in), 1 May 1970 May Jun: 142.7 mm (5.6 in), 13 June 1946 Jun Jul: 158.0 mm (6.2 in), 16 July 1948 Jul Aug: 189.0 mm (7.4 in), 5 August 1979 Aug Sep: 220.0 mm (8.7 in), 22 September 1944 Sep Oct: 259.8 mm (10.2 in), 1 October 1945 Oct Nov: 142.7 mm (5.6 in), 10 November 1971 Nov Dec: 78.0 mm (3.1 in), 7 December 1973 Dec
The wettest day on record for each calendar month at Zapotitlan de Mendez. The most was 259.8 mm (10.2 in) on 1 October 1945.
Record daily precipitation for each month at Zapotitlan de Mendez
MonthRecord daily precipitation (mm)Date
Jan85.9 mm (3.4 in)3 January 1991
Feb106.9 mm (4.2 in)6 February 1946
Mar103.9 mm (4.1 in)29 March 1971
Apr73.9 mm (2.9 in)25 April 1947
May140.0 mm (5.5 in)1 May 1970
Jun142.7 mm (5.6 in)13 June 1946
Jul158.0 mm (6.2 in)16 July 1948
Aug189.0 mm (7.4 in)5 August 1979
Sep220.0 mm (8.7 in)22 September 1944
Oct259.8 mm (10.2 in)1 October 1945
Nov142.7 mm (5.6 in)10 November 1971
Dec78.0 mm (3.1 in)7 December 1973

Period of Record Coverage

1944 to 1991
Days with data per year at Zapotitlan de Mendez 40 years of record at Zapotitlan de Mendez, 1944 to 1991. 5 years have data for under 90 percent of days and are left out of rankings: 1944, 1984, 1987, 1990, 1991. 1944: 236 of 366 days1945: 364 of 365 days1946: 365 of 365 days1947: 334 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 362 of 365 days1952: 334 of 366 days1961: 364 of 365 days1962: 363 of 365 days1963: 363 of 365 days1964: 365 of 366 days1965: 362 of 365 days1966: 359 of 365 days1967: 361 of 365 days1968: 364 of 366 days1969: 364 of 365 days1970: 363 of 365 days1971: 363 of 365 days1972: 364 of 366 days1973: 361 of 365 days1974: 365 of 365 days1975: 362 of 365 days1976: 364 of 366 days1977: 364 of 365 days1978: 362 of 365 days1979: 362 of 365 days1980: 356 of 366 days1981: 363 of 365 days1982: 363 of 365 days1983: 363 of 365 days1984: 303 of 366 days1985: 361 of 365 days1986: 365 of 365 days1987: 272 of 365 days1988: 366 of 366 days1989: 360 of 365 days1990: 212 of 365 days1991: 274 of 365 days19451950196519701975198019851990
40 years of record at Zapotitlan de Mendez, 1944 to 1991. 5 years have data for under 90 percent of days and are left out of rankings: 1944, 1984, 1987, 1990, 1991.
Days with data per year at Zapotitlan de Mendez
YearDays with dataShare of yearComplete
194423664%No
1945364100%Yes
1946365100%Yes
194733492%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
195136299%Yes
195233491%Yes
1961364100%Yes
196236399%Yes
196336399%Yes
1964365100%Yes
196536299%Yes
196635998%Yes
196736199%Yes
196836499%Yes
1969364100%Yes
197036399%Yes
197136399%Yes
197236499%Yes
197336199%Yes
1974365100%Yes
197536299%Yes
197636499%Yes
1977364100%Yes
197836299%Yes
197936299%Yes
198035697%Yes
198136399%Yes
198236399%Yes
198336399%Yes
198430383%No
198536199%Yes
1986365100%Yes
198727275%No
1988366100%Yes
198936099%Yes
199021258%No
199127475%No

Latest Records

20
Latest records at Zapotitlan de Mendez
DateStationRecordValueBeat old record byOld record stoodSignificance
31 October 1991Zapotitlan de Mendez, MXdaily high max31.7 C (89.1 F)1.7 C (3.1 F)24 years16 of 100 (Routine)
30 October 1991Zapotitlan de Mendez, MXdaily high max31.7 C (89.1 F)1.1 C (2.0 F)1 year7 of 100 (Routine)
29 October 1991Zapotitlan de Mendez, MXdaily high max32.8 C (91.0 F)2.8 C (5.0 F)1 year13 of 100 (Routine)
28 October 1991Zapotitlan de Mendez, MXdaily high max31.7 C (89.1 F)1.7 C (3.1 F)18 years14 of 100 (Routine)
27 October 1991Zapotitlan de Mendez, MXdaily high max30.6 C (87.1 F)0.6 C (1.1 F)20 years11 of 100 (Routine)
26 October 1991Zapotitlan de Mendez, MXdaily high max30.6 C (87.1 F)0.6 C (1.1 F)18 years10 of 100 (Routine)
24 October 1991Zapotitlan de Mendez, MXdaily high max30.0 C (86.0 F)1.1 C (2.0 F)41 years19 of 100 (Routine)
23 October 1991Zapotitlan de Mendez, MXdaily high max (Tie)30.6 C (87.1 F)tie4 years1 of 100 (Routine)
18 October 1991Zapotitlan de Mendez, MXdaily low min (Tie)10.0 C (50.0 F)tie42 years4 of 100 (Routine)
17 October 1991Zapotitlan de Mendez, MXdaily low min10.0 C (50.0 F)0.6 C (1.1 F)42 years18 of 100 (Routine)
16 October 1991Zapotitlan de Mendez, MXdaily low min10.6 C (51.1 F)2.2 C (4.0 F)45 years25 of 100 (Routine)
15 October 1991Zapotitlan de Mendez, MXdaily low min6.7 C (44.1 F)3.3 C (5.9 F)38 years27 of 100 (Routine)
14 October 1991Zapotitlan de Mendez, MXmonthly low min5.0 C (41.0 F)1.7 C (3.1 F)38 years31 of 100 (Routine)
13 October 1991Zapotitlan de Mendez, MXmonthly low min (Tie)6.7 C (44.1 F)tie38 years6 of 100 (Routine)
12 October 1991Zapotitlan de Mendez, MXdaily low min9.4 C (48.9 F)2.3 C (4.1 F)38 years23 of 100 (Routine)
6 October 1991Zapotitlan de Mendez, MXdaily low min (Tie)15.0 C (59.0 F)tie42 years4 of 100 (Routine)
2 October 1991Zapotitlan de Mendez, MXdaily low min (Tie)15.0 C (59.0 F)tie45 years4 of 100 (Routine)
28 September 1991Zapotitlan de Mendez, MXdaily low min11.7 C (53.1 F)1.1 C (2.0 F)42 years22 of 100 (Routine)
27 September 1991Zapotitlan de Mendez, MXdaily low min (Tie)13.9 C (57.0 F)tie42 years4 of 100 (Routine)
24 September 1991Zapotitlan de Mendez, MXmonthly low min10.6 C (51.1 F)1.1 C (2.0 F)42 years32 of 100 (Routine)

Climate Trend

33 complete years, 1945 to 1989
Annual mean temperature at Zapotitlan de Mendez as warming stripes, 1945 to 1989 One stripe for each of 33 complete years at Zapotitlan de Mendez, 1945 to 1989. 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 1976, at 20.3 C (68.6 F), and the warmest was 1980, at 22.6 C (72.7 F). The strongest colour marks a difference of 1.2 C (2.2 F). 1945: 21.9 C, +0.5 C from the station mean1946: 20.9 C, -0.6 C from the station mean1948: 21.4 C, -0.1 C from the station mean1949: 21.7 C, +0.3 C from the station mean1950: 21.1 C, -0.3 C from the station mean1951: 21.1 C, -0.3 C from the station mean1961: 20.8 C, -0.7 C from the station mean1962: 21.4 C, 0.0 C from the station mean1963: 21.0 C, -0.4 C from the station mean1964: 21.1 C, -0.3 C from the station mean1965: 21.0 C, -0.4 C from the station mean1966: 20.5 C, -1.0 C from the station mean1967: 20.9 C, -0.5 C from the station mean1968: 20.8 C, -0.6 C from the station mean1969: 21.9 C, +0.4 C from the station mean1970: 21.0 C, -0.5 C from the station mean1971: 21.9 C, +0.4 C from the station mean1972: 21.8 C, +0.4 C from the station mean1973: 21.6 C, +0.2 C from the station mean1974: 21.5 C, 0.0 C from the station mean1975: 21.1 C, -0.3 C from the station mean1976: 20.3 C, -1.1 C from the station mean1977: 21.4 C, 0.0 C from the station mean1978: 21.2 C, -0.2 C from the station mean1979: 20.9 C, -0.6 C from the station mean1980: 22.6 C, +1.2 C from the station mean1981: 22.3 C, +0.9 C from the station mean1982: 22.1 C, +0.6 C from the station mean1983: 21.8 C, +0.4 C from the station mean1985: 21.9 C, +0.4 C from the station mean1986: 22.3 C, +0.9 C from the station mean1988: 21.7 C, +0.3 C from the station mean1989: 22.5 C, +1.1 C from the station mean194519501955196019651970197519801985
One stripe for each of 33 complete years at Zapotitlan de Mendez, 1945 to 1989. 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 1976, at 20.3 C (68.6 F), and the warmest was 1980, at 22.6 C (72.7 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Zapotitlan de Mendez as warming stripes, 1945 to 1989
YearAnnual mean temperatureDifference from the station mean
194521.9 C+0.45 C
194620.9 C-0.57 C
194821.4 C-0.09 C
194921.7 C+0.27 C
195021.1 C-0.30 C
195121.1 C-0.31 C
196120.8 C-0.68 C
196221.4 C-0.01 C
196321.0 C-0.43 C
196421.1 C-0.33 C
196521.0 C-0.45 C
196620.5 C-0.96 C
196720.9 C-0.50 C
196820.8 C-0.65 C
196921.9 C+0.44 C
197021.0 C-0.49 C
197121.9 C+0.44 C
197221.8 C+0.38 C
197321.6 C+0.18 C
197421.5 C+0.03 C
197521.1 C-0.32 C
197620.3 C-1.12 C
197721.4 C-0.03 C
197821.2 C-0.20 C
197920.9 C-0.57 C
198022.6 C+1.15 C
198122.3 C+0.90 C
198222.1 C+0.63 C
198321.8 C+0.39 C
198521.9 C+0.42 C
198622.3 C+0.89 C
198821.7 C+0.28 C
198922.5 C+1.07 C

The annual mean temperature here has risen by 0.19 C (0.04 to 0.34) per decade over 1945 to 1989. In Fahrenheit: 0.3 F (0.1 to 0.6) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Zapotitlan de Mendez
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.19 C (0.04 to 0.34) per decade0.3 F (0.1 to 0.6) per decade1945 to 198933Rise
Mean daily maximum-0.2 C (-0.5 to 0.1) per decade-0.4 F (-1.0 to 0.1) per decade1945 to 198933Not clearly different from zero
Mean daily minimum0.6 C (0.4 to 0.8) per decade1.1 F (0.8 to 1.4) per decade1945 to 198933Rise

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

1944 to 1991
Yearly extremes at Zapotitlan de Mendez: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.0 C (104.0 F)194835.0 C (95.0 F)40
Coldest night (TNn)1.7 C (35.1 F)19516.1 C (43.0 F)40
Wettest day (Rx1day)259.8 mm (10.2 in)1945115.8 mm (4.6 in)40
Wettest five days (Rx5day)598.8 mm (23.6 in)1944225.9 mm (8.9 in)40
Longest dry spell (CDD)56 days198824 days40

Hottest day (TXx)

Hottest day (TXx) at Zapotitlan de Mendez by year The hottest day of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 40.0 C (104.0 F) in 1948, marked on the chart; the median year is 35.0 C (95.0 F). 323436384019501960197019801990Record: 40.0 C (104.0 F) in 1948
The hottest day of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 40.0 C (104.0 F) in 1948, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Zapotitlan de Mendez by year
YearHottest day (TXx)
194436.1 C (97.0 F)
194536.7 C (98.1 F)
194636.7 C (98.1 F)
194736.1 C (97.0 F)
194840.0 C (104.0 F)
194936.7 C (98.1 F)
195035.6 C (96.1 F)
195136.7 C (98.1 F)
195236.7 C (98.1 F)
196135.6 C (96.1 F)
196232.8 C (91.0 F)
196333.9 C (93.0 F)
196435.0 C (95.0 F)
196533.9 C (93.0 F)
196632.2 C (90.0 F)
196733.9 C (93.0 F)
196833.9 C (93.0 F)
196933.9 C (93.0 F)
197032.8 C (91.0 F)
197136.7 C (98.1 F)
197235.0 C (95.0 F)
197336.7 C (98.1 F)
197435.6 C (96.1 F)
197535.0 C (95.0 F)
197632.8 C (91.0 F)
197735.0 C (95.0 F)
197835.0 C (95.0 F)
197932.8 C (91.0 F)
198035.0 C (95.0 F)
198136.7 C (98.1 F)
198235.0 C (95.0 F)
198336.1 C (97.0 F)
198436.7 C (98.1 F)
198534.4 C (93.9 F)
198635.0 C (95.0 F)
198733.9 C (93.0 F)
198833.9 C (93.0 F)
198937.2 C (99.0 F)
199035.0 C (95.0 F)
199138.3 C (100.9 F)

Coldest night (TNn)

Coldest night (TNn) at Zapotitlan de Mendez by year The coldest night of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 1.7 C (35.1 F) in 1951, marked on the chart; the median year is 6.1 C (43.0 F). 02.557.51019501960197019801990Record: 1.7 C (35.1 F) in 1951
The coldest night of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 1.7 C (35.1 F) in 1951, marked on the chart; the median year is 6.1 C (43.0 F).
Coldest night (TNn) at Zapotitlan de Mendez by year
YearColdest night (TNn)
19445.0 C (41.0 F)
19455.0 C (41.0 F)
19465.0 C (41.0 F)
19473.9 C (39.0 F)
19486.7 C (44.1 F)
19493.9 C (39.0 F)
19505.0 C (41.0 F)
19511.7 C (35.1 F)
19525.6 C (42.1 F)
19616.7 C (44.1 F)
19623.9 C (39.0 F)
19635.0 C (41.0 F)
19645.6 C (42.1 F)
19656.1 C (43.0 F)
19666.7 C (44.1 F)
19675.6 C (42.1 F)
19686.1 C (43.0 F)
19696.7 C (44.1 F)
19706.1 C (43.0 F)
19718.9 C (48.0 F)
19727.8 C (46.0 F)
19735.0 C (41.0 F)
19746.7 C (44.1 F)
19756.7 C (44.1 F)
19766.7 C (44.1 F)
19776.7 C (44.1 F)
19788.9 C (48.0 F)
19796.7 C (44.1 F)
19806.7 C (44.1 F)
19817.2 C (45.0 F)
19826.7 C (44.1 F)
19833.9 C (39.0 F)
19848.9 C (48.0 F)
19855.6 C (42.1 F)
19865.0 C (41.0 F)
19875.6 C (42.1 F)
19887.8 C (46.0 F)
19893.3 C (37.9 F)
199010.0 C (50.0 F)
19915.0 C (41.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Zapotitlan de Mendez by year The wettest day of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 259.8 mm (10.2 in) in 1945, marked on the chart; the median year is 115.8 mm (4.6 in). 010020030019501960197019801990Record: 259.8 mm (10.2 in) in 1945
The wettest day of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 259.8 mm (10.2 in) in 1945, marked on the chart; the median year is 115.8 mm (4.6 in).
Wettest day (Rx1day) at Zapotitlan de Mendez by year
YearWettest day (Rx1day)
1944220.0 mm (8.7 in)
1945259.8 mm (10.2 in)
1946142.7 mm (5.6 in)
1947132.8 mm (5.2 in)
1948158.0 mm (6.2 in)
194986.4 mm (3.4 in)
195086.9 mm (3.4 in)
195178.0 mm (3.1 in)
1952115.8 mm (4.6 in)
1961159.8 mm (6.3 in)
196280.8 mm (3.2 in)
1963129.8 mm (5.1 in)
1964115.8 mm (4.6 in)
196558.9 mm (2.3 in)
196699.8 mm (3.9 in)
196789.9 mm (3.5 in)
1968104.9 mm (4.1 in)
1969156.0 mm (6.1 in)
1970140.0 mm (5.5 in)
1971152.9 mm (6.0 in)
197277.0 mm (3.0 in)
1973127.0 mm (5.0 in)
1974151.9 mm (6.0 in)
1975143.8 mm (5.7 in)
1976177.8 mm (7.0 in)
197765.8 mm (2.6 in)
197867.3 mm (2.6 in)
1979189.0 mm (7.4 in)
1980127.0 mm (5.0 in)
1981136.4 mm (5.4 in)
198255.9 mm (2.2 in)
198331.8 mm (1.3 in)
1984140.0 mm (5.5 in)
1985102.9 mm (4.1 in)
198657.9 mm (2.3 in)
1987129.8 mm (5.1 in)
198866.8 mm (2.6 in)
198983.8 mm (3.3 in)
199063.8 mm (2.5 in)
199185.9 mm (3.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Zapotitlan de Mendez by year The wettest five days of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 598.8 mm (23.6 in) in 1944, marked on the chart; the median year is 225.9 mm (8.9 in). 020040060019501960197019801990Record: 598.8 mm (23.6 in) in 1944
The wettest five days of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 598.8 mm (23.6 in) in 1944, marked on the chart; the median year is 225.9 mm (8.9 in).
Wettest five days (Rx5day) at Zapotitlan de Mendez by year
YearWettest five days (Rx5day)
1944598.8 mm (23.6 in)
1945570.2 mm (22.4 in)
1946256.8 mm (10.1 in)
1947229.1 mm (9.0 in)
1948327.7 mm (12.9 in)
1949213.4 mm (8.4 in)
1950189.2 mm (7.4 in)
1951197.7 mm (7.8 in)
1952386.4 mm (15.2 in)
1961237.2 mm (9.3 in)
1962261.7 mm (10.3 in)
1963322.3 mm (12.7 in)
1964199.6 mm (7.9 in)
1965119.6 mm (4.7 in)
1966222.7 mm (8.8 in)
1967175.2 mm (6.9 in)
1968219.4 mm (8.6 in)
1969339.4 mm (13.4 in)
1970154.2 mm (6.1 in)
1971271.3 mm (10.7 in)
1972185.3 mm (7.3 in)
1973265.2 mm (10.4 in)
1974219.1 mm (8.6 in)
1975373.4 mm (14.7 in)
1976359.4 mm (14.1 in)
1977197.2 mm (7.8 in)
1978182.8 mm (7.2 in)
1979269.6 mm (10.6 in)
1980257.6 mm (10.1 in)
1981352.1 mm (13.9 in)
198269.6 mm (2.7 in)
1983111.9 mm (4.4 in)
1984216.4 mm (8.5 in)
1985258.3 mm (10.2 in)
1986129.3 mm (5.1 in)
1987280.6 mm (11.0 in)
1988136.1 mm (5.4 in)
1989321.1 mm (12.6 in)
1990156.3 mm (6.2 in)
1991108.4 mm (4.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Zapotitlan de Mendez by year The longest dry spell of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 56 days in 1988, marked on the chart; the median year is 24 days. 020406019501960197019801990Record: 56 days in 1988
The longest dry spell of the year at Zapotitlan de Mendez, 1944 to 1991. The record is 56 days in 1988, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at Zapotitlan de Mendez by year
YearLongest dry spell (CDD)
194412 days
194539 days
194629 days
194722 days
194838 days
194929 days
195018 days
195145 days
195218 days
196120 days
196231 days
196325 days
196426 days
196526 days
196618 days
196718 days
196812 days
196921 days
197024 days
197124 days
197225 days
197332 days
197423 days
197538 days
197613 days
197717 days
197825 days
197917 days
198018 days
198119 days
198214 days
198318 days
198438 days
198517 days
198623 days
198725 days
198856 days
198926 days
199015 days
199127 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

35 years, 1945 to 1989

A day with at least 109.9 mm (4.3 in) of rain is expected about once in 2 years. A day with at least 242.4 mm (9.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Zapotitlan de Mendez: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years109.9 mm (4.3 in)
5 years152.0 mm (6.0 in)
10 years176.9 mm (7.0 in)
25 years205.5 mm (8.1 in)
50 years224.7 mm (8.8 in)Longer than the 35 years of record
100 years242.4 mm (9.5 in)Longer than the 35 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, 35 years of values from 1945 to 1989.

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: 259.8 mm (10.2 in) in 1945; 189.0 mm (7.4 in) in 1979; 177.8 mm (7.0 in) in 1976.

Download the Data

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