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Otatitlan Weather Records (MXN00030121)

Record envelope, standing records and threshold days for Otatitlan (MXN00030121), Mexico, with 69 years of record.

Key Facts for Otatitlan

  • Otatitlan (MXN00030121) is a weather station in Mexico at 18.17 latitude and -96.03 longitude, 19 m (62 ft) above sea level.
  • The station reports from 1934 to 2002, 69 years of record.
  • 1,464 records set at Otatitlan still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Otatitlan set a daily record low minimum temperature of 13.9 C (57.0 F) on 24 November 2002.

About the Station

  • Location: Mexico, 18.17 latitude, -96.03 longitude.
  • Elevation: 19 m (62 ft).
  • Period of record: 1934 to 2002, 69 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 Otatitlan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Otatitlan. 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 Otatitlan. 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 Otatitlan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan37.8 C (100.0 F)8.3 C (46.9 F)n/an/a
Feb41.1 C (106.0 F)6.1 C (43.0 F)n/an/a
Mar44.4 C (111.9 F)10.6 C (51.1 F)n/an/a
Apr45.0 C (113.0 F)12.2 C (54.0 F)n/an/a
May46.7 C (116.1 F)16.1 C (61.0 F)n/an/a
Jun46.7 C (116.1 F)15.6 C (60.1 F)n/an/a
Jul41.1 C (106.0 F)16.7 C (62.1 F)n/an/a
Aug41.1 C (106.0 F)20.0 C (68.0 F)n/an/a
Sep40.0 C (104.0 F)16.7 C (62.1 F)n/an/a
Oct37.8 C (100.0 F)15.6 C (60.1 F)n/an/a
Nov38.3 C (100.9 F)11.1 C (52.0 F)n/an/a
Dec35.6 C (96.1 F)8.3 C (46.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Otatitlan by the year they were set 1,464 records at Otatitlan still stand. 1987 holds the most, with 190. 0501001502001934: 121935: 241936: 371938: 191939: 391940: 311941: 261942: 501943: 161944: 511945: 111946: 251947: 251948: 231949: 331950: 121951: 221952: 171953: 241954: 151955: 81956: 141957: 291958: 201959: 181960: 211961: 141962: 181963: 151964: 171965: 141966: 181967: 171968: 71969: 141970: 191971: 151972: 301973: 421974: 291975: 101976: 191977: 121978: 101979: 161980: 141981: 111982: 81983: 161984: 81985: 41986: 281987: 1901988: 231989: 181990: 31998: 801999: 242000: 122001: 332002: 34193419421949195619631970197719841998
1,464 records at Otatitlan still stand. 1987 holds the most, with 190.
Standing records at Otatitlan by the year they were set
Year setStanding records
193412
193524
193637
193819
193939
194031
194126
194250
194316
194451
194511
194625
194725
194823
194933
195012
195122
195217
195324
195415
19558
195614
195729
195820
195918
196021
196114
196218
196315
196417
196514
196618
196717
19687
196914
197019
197115
197230
197342
197429
197510
197619
197712
197810
197916
198014
198111
19828
198316
19848
19854
198628
1987190
198823
198918
19903
199880
199924
200012
200133
200234

All-Time Record Progression

4 new records
When Otatitlan set new all-time records 4 all-time records were set at Otatitlan between 28 March 1973 and 7 May 1998. Each dot is a new record. Record high maximum temperatureRecord daily precipitation28 March 1973: Record high maximum temperature 44.4 C (111.9 F)4 June 1978: Record daily precipitation 286.8 mm (11.3 in)16 April 1998: Record high maximum temperature 45.0 C (113.0 F)7 May 1998: Record high maximum temperature 46.7 C (116.1 F)19751980198519901995
4 all-time records were set at Otatitlan between 28 March 1973 and 7 May 1998. Each dot is a new record.
When Otatitlan set new all-time records
DateKindDetail
1973-03-28Record high maximum temperatureRecord high maximum temperature 44.4 C (111.9 F)
1978-06-04Record daily precipitationRecord daily precipitation 286.8 mm (11.3 in)
1998-04-16Record high maximum temperatureRecord high maximum temperature 45.0 C (113.0 F)
1998-05-07Record high maximum temperatureRecord high maximum temperature 46.7 C (116.1 F)

Wettest Day of Each Month

Jun: 286.8 mm (11.3 in)
Record daily precipitation for each month at Otatitlan The wettest day on record for each calendar month at Otatitlan. The most was 286.8 mm (11.3 in) on 4 June 1978. 0100200300 Jan: 206.5 mm (8.1 in), 4 January 1943 Jan Feb: 91.4 mm (3.6 in), 7 February 1987 Feb Mar: 70.9 mm (2.8 in), 11 March 2000 Mar Apr: 76.7 mm (3.0 in), 2 April 1943 Apr May: 164.8 mm (6.5 in), 20 May 1960 May Jun: 286.8 mm (11.3 in), 4 June 1978 Jun Jul: 241.8 mm (9.5 in), 12 July 1942 Jul Aug: 174.0 mm (6.9 in), 30 August 1970 Aug Sep: 158.0 mm (6.2 in), 19 September 1978 Sep Oct: 194.8 mm (7.7 in), 31 October 1959 Oct Nov: 113.8 mm (4.5 in), 22 November 1977 Nov Dec: 205.0 mm (8.1 in), 17 December 1978 Dec
The wettest day on record for each calendar month at Otatitlan. The most was 286.8 mm (11.3 in) on 4 June 1978.
Record daily precipitation for each month at Otatitlan
MonthRecord daily precipitation (mm)Date
Jan206.5 mm (8.1 in)4 January 1943
Feb91.4 mm (3.6 in)7 February 1987
Mar70.9 mm (2.8 in)11 March 2000
Apr76.7 mm (3.0 in)2 April 1943
May164.8 mm (6.5 in)20 May 1960
Jun286.8 mm (11.3 in)4 June 1978
Jul241.8 mm (9.5 in)12 July 1942
Aug174.0 mm (6.9 in)30 August 1970
Sep158.0 mm (6.2 in)19 September 1978
Oct194.8 mm (7.7 in)31 October 1959
Nov113.8 mm (4.5 in)22 November 1977
Dec205.0 mm (8.1 in)17 December 1978

Period of Record Coverage

1934 to 2002
Days with data per year at Otatitlan 61 years of record at Otatitlan, 1934 to 2002. 7 years have data for under 90 percent of days and are left out of rankings: 1934, 1944, 1945, 1984, 1986, 1990, 1999. 1934: 236 of 365 days1935: 363 of 365 days1936: 363 of 366 days1938: 361 of 365 days1939: 365 of 365 days1940: 362 of 366 days1941: 362 of 365 days1942: 365 of 365 days1943: 364 of 365 days1944: 244 of 366 days1945: 101 of 365 days1946: 362 of 365 days1947: 361 of 365 days1948: 363 of 366 days1949: 363 of 365 days1950: 364 of 365 days1951: 362 of 365 days1952: 363 of 366 days1953: 364 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 363 of 366 days1957: 332 of 365 days1958: 361 of 365 days1959: 361 of 365 days1960: 363 of 366 days1961: 360 of 365 days1962: 364 of 365 days1963: 363 of 365 days1964: 364 of 366 days1965: 330 of 365 days1966: 363 of 365 days1967: 359 of 365 days1968: 359 of 366 days1969: 359 of 365 days1970: 359 of 365 days1971: 364 of 365 days1972: 365 of 366 days1973: 359 of 365 days1974: 365 of 365 days1975: 364 of 365 days1976: 365 of 366 days1977: 364 of 365 days1978: 361 of 365 days1979: 361 of 365 days1980: 363 of 366 days1981: 363 of 365 days1982: 364 of 365 days1983: 362 of 365 days1984: 241 of 366 days1985: 363 of 365 days1986: 241 of 365 days1987: 360 of 365 days1988: 365 of 366 days1989: 353 of 365 days1990: 59 of 365 days1998: 365 of 365 days1999: 303 of 365 days2000: 365 of 366 days2001: 364 of 365 days2002: 332 of 365 days1940195019601970198019902000
61 years of record at Otatitlan, 1934 to 2002. 7 years have data for under 90 percent of days and are left out of rankings: 1934, 1944, 1945, 1984, 1986, 1990, 1999.
Days with data per year at Otatitlan
YearDays with dataShare of yearComplete
193423665%No
193536399%Yes
193636399%Yes
193836199%Yes
1939365100%Yes
194036299%Yes
194136299%Yes
1942365100%Yes
1943364100%Yes
194424467%No
194510128%No
194636299%Yes
194736199%Yes
194836399%Yes
194936399%Yes
1950364100%Yes
195136299%Yes
195236399%Yes
1953364100%Yes
1954365100%Yes
1955365100%Yes
195636399%Yes
195733291%Yes
195836199%Yes
195936199%Yes
196036399%Yes
196136099%Yes
1962364100%Yes
196336399%Yes
196436499%Yes
196533090%Yes
196636399%Yes
196735998%Yes
196835998%Yes
196935998%Yes
197035998%Yes
1971364100%Yes
1972365100%Yes
197335998%Yes
1974365100%Yes
1975364100%Yes
1976365100%Yes
1977364100%Yes
197836199%Yes
197936199%Yes
198036399%Yes
198136399%Yes
1982364100%Yes
198336299%Yes
198424166%No
198536399%Yes
198624166%No
198736099%Yes
1988365100%Yes
198935397%Yes
19905916%No
1998365100%Yes
199930383%No
2000365100%Yes
2001364100%Yes
200233291%Yes

Latest Records

20
Latest records at Otatitlan
DateStationRecordValueBeat old record byOld record stoodSignificance
24 November 2002Otatitlan, MXdaily low min13.9 C (57.0 F)0.5 C (0.9 F)48 years22 of 100 (Routine)
23 November 2002Otatitlan, MXdaily low min (Tie)15.0 C (59.0 F)tie33 years4 of 100 (Routine)
28 October 2002Otatitlan, MXdaily high min25.0 C (77.0 F)0.6 C (1.1 F)25 years16 of 100 (Routine)
27 October 2002Otatitlan, MXdaily high min24.4 C (75.9 F)0.5 C (0.9 F)63 years26 of 100 (Routine)
27 October 2002Otatitlan, MXmonthly high max (Tie)37.8 C (100.0 F)tie4 years4 of 100 (Routine)
26 October 2002Otatitlan, MXdaily high min24.4 C (75.9 F)0.5 C (0.9 F)60 years26 of 100 (Routine)
26 October 2002Otatitlan, MXdaily high max37.2 C (99.0 F)0.5 C (0.9 F)0 years7 of 100 (Routine)
24 October 2002Otatitlan, MXdaily high min (Tie)23.9 C (75.0 F)tie55 years5 of 100 (Routine)
23 October 2002Otatitlan, MXdaily high max (Tie)35.6 C (96.1 F)tie21 years3 of 100 (Routine)
22 October 2002Otatitlan, MXdaily high max36.7 C (98.1 F)0.6 C (1.1 F)0 years8 of 100 (Routine)
18 October 2002Otatitlan, MXdaily high min25.0 C (77.0 F)0.6 C (1.1 F)68 years29 of 100 (Routine)
16 October 2002Otatitlan, MXdaily high min (Tie)25.0 C (77.0 F)tie41 years4 of 100 (Routine)
9 October 2002Otatitlan, MXdaily high max37.2 C (99.0 F)0.5 C (0.9 F)0 years7 of 100 (Routine)
8 October 2002Otatitlan, MXdaily high max35.6 C (96.1 F)0.6 C (1.1 F)53 years24 of 100 (Routine)
4 October 2002Otatitlan, MXdaily high min (Tie)25.0 C (77.0 F)tie53 years5 of 100 (Routine)
4 October 2002Otatitlan, MXdaily high max (Tie)36.7 C (98.1 F)tie4 years1 of 100 (Routine)
3 October 2002Otatitlan, MXdaily high max (Tie)36.7 C (98.1 F)tie4 years1 of 100 (Routine)
28 September 2002Otatitlan, MXdaily high max37.8 C (100.0 F)1.1 C (2.0 F)28 years17 of 100 (Routine)
19 September 2002Otatitlan, MXdaily high max37.2 C (99.0 F)0.5 C (0.9 F)0 years7 of 100 (Routine)
19 September 2002Otatitlan, MXdaily high min (Tie)25.0 C (77.0 F)tie48 years5 of 100 (Routine)

Climate Trend

51 complete years, 1935 to 2001
Annual mean temperature at Otatitlan as warming stripes, 1935 to 2001 One stripe for each of 51 complete years at Otatitlan, 1935 to 2001. Blue stripes are years cooler than the station's own mean of 25.7 C (78.3 F); red stripes are warmer. The coolest year was 1940, at 23.7 C (74.7 F), and the warmest was 1998, at 27.8 C (82.1 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1935: 24.7 C, -1.0 C from the station mean1936: 23.9 C, -1.8 C from the station mean1938: 24.4 C, -1.3 C from the station mean1939: 23.9 C, -1.8 C from the station mean1940: 23.7 C, -2.0 C from the station mean1941: 24.1 C, -1.6 C from the station mean1942: 24.4 C, -1.3 C from the station mean1943: 24.3 C, -1.4 C from the station mean1946: 26.1 C, +0.4 C from the station mean1947: 25.8 C, +0.1 C from the station mean1948: 26.2 C, +0.5 C from the station mean1949: 26.8 C, +1.1 C from the station mean1950: 25.8 C, +0.1 C from the station mean1951: 25.7 C, 0.0 C from the station mean1952: 25.3 C, -0.4 C from the station mean1953: 25.9 C, +0.2 C from the station mean1954: 25.4 C, -0.3 C from the station mean1955: 26.0 C, +0.3 C from the station mean1956: 25.6 C, -0.1 C from the station mean1958: 26.0 C, +0.3 C from the station mean1959: 25.8 C, +0.1 C from the station mean1960: 25.8 C, +0.1 C from the station mean1961: 25.8 C, +0.1 C from the station mean1962: 26.0 C, +0.3 C from the station mean1963: 25.8 C, +0.1 C from the station mean1964: 26.3 C, +0.6 C from the station mean1966: 25.3 C, -0.4 C from the station mean1967: 25.5 C, -0.2 C from the station mean1968: 25.2 C, -0.5 C from the station mean1969: 25.8 C, +0.1 C from the station mean1970: 25.4 C, -0.3 C from the station mean1971: 26.1 C, +0.4 C from the station mean1972: 26.8 C, +1.1 C from the station mean1973: 26.7 C, +1.0 C from the station mean1974: 26.5 C, +0.8 C from the station mean1975: 26.2 C, +0.5 C from the station mean1976: 25.2 C, -0.5 C from the station mean1977: 25.7 C, 0.0 C from the station mean1978: 25.3 C, -0.4 C from the station mean1979: 25.3 C, -0.4 C from the station mean1980: 25.8 C, +0.1 C from the station mean1981: 25.7 C, 0.0 C from the station mean1982: 26.1 C, +0.4 C from the station mean1983: 26.1 C, +0.4 C from the station mean1985: 25.6 C, -0.2 C from the station mean1987: 26.6 C, +0.8 C from the station mean1988: 26.1 C, +0.4 C from the station mean1989: 26.1 C, +0.4 C from the station mean1998: 27.8 C, +2.1 C from the station mean2000: 27.2 C, +1.5 C from the station mean2001: 27.4 C, +1.7 C from the station mean19351940195019601970198019902000
One stripe for each of 51 complete years at Otatitlan, 1935 to 2001. Blue stripes are years cooler than the station's own mean of 25.7 C (78.3 F); red stripes are warmer. The coolest year was 1940, at 23.7 C (74.7 F), and the warmest was 1998, at 27.8 C (82.1 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Otatitlan as warming stripes, 1935 to 2001
YearAnnual mean temperatureDifference from the station mean
193524.7 C-0.97 C
193623.9 C-1.77 C
193824.4 C-1.32 C
193923.9 C-1.83 C
194023.7 C-1.98 C
194124.1 C-1.64 C
194224.4 C-1.26 C
194324.3 C-1.37 C
194626.1 C+0.42 C
194725.8 C+0.11 C
194826.2 C+0.53 C
194926.8 C+1.07 C
195025.8 C+0.06 C
195125.7 C-0.04 C
195225.3 C-0.39 C
195325.9 C+0.21 C
195425.4 C-0.31 C
195526.0 C+0.29 C
195625.6 C-0.14 C
195826.0 C+0.26 C
195925.8 C+0.10 C
196025.8 C+0.07 C
196125.8 C+0.08 C
196226.0 C+0.33 C
196325.8 C+0.11 C
196426.3 C+0.56 C
196625.3 C-0.36 C
196725.5 C-0.17 C
196825.2 C-0.47 C
196925.8 C+0.07 C
197025.4 C-0.27 C
197126.1 C+0.39 C
197226.8 C+1.07 C
197326.7 C+1.01 C
197426.5 C+0.83 C
197526.2 C+0.46 C
197625.2 C-0.54 C
197725.7 C-0.02 C
197825.3 C-0.36 C
197925.3 C-0.36 C
198025.8 C+0.10 C
198125.7 C-0.01 C
198226.1 C+0.36 C
198326.1 C+0.41 C
198525.6 C-0.15 C
198726.6 C+0.85 C
198826.1 C+0.37 C
198926.1 C+0.36 C
199827.8 C+2.13 C
200027.2 C+1.47 C
200127.4 C+1.66 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1935 to 2001. In Fahrenheit: 0.6 F (0.4 to 0.8) per decade. The slope is a straight line fitted to 51 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Otatitlan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.3 C (0.2 to 0.4) per decade0.6 F (0.4 to 0.8) per decade1935 to 200151Rise
Mean daily maximum0.6 C (0.5 to 0.8) per decade1.1 F (0.9 to 1.4) per decade1935 to 200151Rise
Mean daily minimum0.03 C (-0.05 to 0.11) per decade0.1 F (-0.1 to 0.2) per decade1935 to 200151Not 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

1934 to 2002
Yearly extremes at Otatitlan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.7 C (116.1 F)199840.6 C (105.1 F)61
Coldest night (TNn)6.1 C (43.0 F)196011.7 C (53.1 F)61
Wettest day (Rx1day)286.8 mm (11.3 in)1978108.0 mm (4.3 in)61
Wettest five days (Rx5day)605.5 mm (23.8 in)1942216.4 mm (8.5 in)61
Longest dry spell (CDD)106 days200233 days61

Hottest day (TXx)

Hottest day (TXx) at Otatitlan by year The hottest day of the year at Otatitlan, 1934 to 2002. The record is 46.7 C (116.1 F) in 1998, marked on the chart; the median year is 40.6 C (105.1 F). 30354045501940196019802000Record: 46.7 C (116.1 F) in 1998
The hottest day of the year at Otatitlan, 1934 to 2002. The record is 46.7 C (116.1 F) in 1998, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Otatitlan by year
YearHottest day (TXx)
193433.9 C (93.0 F)
193539.4 C (102.9 F)
193635.6 C (96.1 F)
193836.1 C (97.0 F)
193935.0 C (95.0 F)
194037.8 C (100.0 F)
194135.0 C (95.0 F)
194236.7 C (98.1 F)
194335.0 C (95.0 F)
194440.0 C (104.0 F)
194542.8 C (109.0 F)
194636.7 C (98.1 F)
194738.9 C (102.0 F)
194838.9 C (102.0 F)
194940.0 C (104.0 F)
195038.9 C (102.0 F)
195140.0 C (104.0 F)
195240.0 C (104.0 F)
195342.2 C (108.0 F)
195439.4 C (102.9 F)
195542.8 C (109.0 F)
195641.1 C (106.0 F)
195740.0 C (104.0 F)
195840.0 C (104.0 F)
195937.2 C (99.0 F)
196040.6 C (105.1 F)
196140.6 C (105.1 F)
196241.1 C (106.0 F)
196341.1 C (106.0 F)
196443.3 C (109.9 F)
196541.1 C (106.0 F)
196639.4 C (102.9 F)
196741.7 C (107.1 F)
196840.0 C (104.0 F)
196941.1 C (106.0 F)
197041.1 C (106.0 F)
197142.2 C (108.0 F)
197242.8 C (109.0 F)
197344.4 C (111.9 F)
197442.8 C (109.0 F)
197540.0 C (104.0 F)
197640.6 C (105.1 F)
197740.6 C (105.1 F)
197841.1 C (106.0 F)
197940.0 C (104.0 F)
198042.2 C (108.0 F)
198140.0 C (104.0 F)
198239.4 C (102.9 F)
198341.7 C (107.1 F)
198440.6 C (105.1 F)
198540.0 C (104.0 F)
198641.7 C (107.1 F)
198741.1 C (106.0 F)
198841.7 C (107.1 F)
198941.1 C (106.0 F)
199036.7 C (98.1 F)
199846.7 C (116.1 F)
199946.1 C (115.0 F)
200042.2 C (108.0 F)
200142.2 C (108.0 F)
200243.3 C (109.9 F)

Coldest night (TNn)

Coldest night (TNn) at Otatitlan by year The coldest night of the year at Otatitlan, 1934 to 2002. The record is 6.1 C (43.0 F) in 1960, marked on the chart; the median year is 11.7 C (53.1 F). 57.51012.51517.51940196019802000Record: 6.1 C (43.0 F) in 1960
The coldest night of the year at Otatitlan, 1934 to 2002. The record is 6.1 C (43.0 F) in 1960, marked on the chart; the median year is 11.7 C (53.1 F).
Coldest night (TNn) at Otatitlan by year
YearColdest night (TNn)
193415.6 C (60.1 F)
193511.1 C (52.0 F)
193611.7 C (53.1 F)
193813.3 C (55.9 F)
193913.9 C (57.0 F)
194010.0 C (50.0 F)
194110.0 C (50.0 F)
194212.8 C (55.0 F)
194312.2 C (54.0 F)
194410.6 C (51.1 F)
194513.9 C (57.0 F)
194615.6 C (60.1 F)
194712.8 C (55.0 F)
194811.7 C (53.1 F)
194912.8 C (55.0 F)
195012.8 C (55.0 F)
195110.6 C (51.1 F)
195210.0 C (50.0 F)
195310.6 C (51.1 F)
195410.6 C (51.1 F)
195511.7 C (53.1 F)
195611.1 C (52.0 F)
195712.2 C (54.0 F)
195811.7 C (53.1 F)
195913.3 C (55.9 F)
19606.1 C (43.0 F)
196111.7 C (53.1 F)
196210.6 C (51.1 F)
19639.4 C (48.9 F)
196411.7 C (53.1 F)
196512.2 C (54.0 F)
196611.7 C (53.1 F)
196710.6 C (51.1 F)
196811.1 C (52.0 F)
196911.1 C (52.0 F)
197010.0 C (50.0 F)
197112.2 C (54.0 F)
197213.9 C (57.0 F)
197311.7 C (53.1 F)
197414.4 C (57.9 F)
197513.9 C (57.0 F)
197611.1 C (52.0 F)
197710.0 C (50.0 F)
197812.8 C (55.0 F)
197910.6 C (51.1 F)
198011.7 C (53.1 F)
198112.8 C (55.0 F)
198212.8 C (55.0 F)
198310.0 C (50.0 F)
198411.7 C (53.1 F)
198512.2 C (54.0 F)
198611.1 C (52.0 F)
198715.6 C (60.1 F)
198812.2 C (54.0 F)
19898.3 C (46.9 F)
199013.3 C (55.9 F)
199811.7 C (53.1 F)
199912.2 C (54.0 F)
200013.3 C (55.9 F)
200112.8 C (55.0 F)
200210.0 C (50.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Otatitlan by year The wettest day of the year at Otatitlan, 1934 to 2002. The record is 286.8 mm (11.3 in) in 1978, marked on the chart; the median year is 108.0 mm (4.3 in). 01002003001940196019802000Record: 286.8 mm (11.3 in) in 1978
The wettest day of the year at Otatitlan, 1934 to 2002. The record is 286.8 mm (11.3 in) in 1978, marked on the chart; the median year is 108.0 mm (4.3 in).
Wettest day (Rx1day) at Otatitlan by year
YearWettest day (Rx1day)
1934141.0 mm (5.6 in)
193589.9 mm (3.5 in)
1936129.8 mm (5.1 in)
1938192.3 mm (7.6 in)
193993.5 mm (3.7 in)
194092.5 mm (3.6 in)
1941129.3 mm (5.1 in)
1942241.8 mm (9.5 in)
1943206.5 mm (8.1 in)
1944133.9 mm (5.3 in)
194587.9 mm (3.5 in)
194670.9 mm (2.8 in)
194795.0 mm (3.7 in)
1948122.9 mm (4.8 in)
1949108.0 mm (4.3 in)
1950171.5 mm (6.8 in)
195179.8 mm (3.1 in)
1952102.4 mm (4.0 in)
1953103.9 mm (4.1 in)
195489.9 mm (3.5 in)
1955158.5 mm (6.2 in)
1956113.8 mm (4.5 in)
195779.0 mm (3.1 in)
1958129.8 mm (5.1 in)
1959194.8 mm (7.7 in)
1960164.8 mm (6.5 in)
1961110.5 mm (4.4 in)
196291.4 mm (3.6 in)
196398.8 mm (3.9 in)
196481.8 mm (3.2 in)
1965105.4 mm (4.1 in)
1966192.8 mm (7.6 in)
196768.8 mm (2.7 in)
1968177.3 mm (7.0 in)
1969105.9 mm (4.2 in)
1970174.0 mm (6.9 in)
1971127.8 mm (5.0 in)
197295.0 mm (3.7 in)
1973110.0 mm (4.3 in)
1974125.0 mm (4.9 in)
1975152.9 mm (6.0 in)
1976150.9 mm (5.9 in)
1977113.8 mm (4.5 in)
1978286.8 mm (11.3 in)
197971.9 mm (2.8 in)
1980104.9 mm (4.1 in)
1981138.4 mm (5.4 in)
1982108.0 mm (4.3 in)
198386.9 mm (3.4 in)
1984140.0 mm (5.5 in)
198598.3 mm (3.9 in)
198661.0 mm (2.4 in)
198791.4 mm (3.6 in)
1988140.0 mm (5.5 in)
198968.8 mm (2.7 in)
199077.0 mm (3.0 in)
1998172.0 mm (6.8 in)
1999119.9 mm (4.7 in)
200077.0 mm (3.0 in)
200172.9 mm (2.9 in)
200248.8 mm (1.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Otatitlan by year The wettest five days of the year at Otatitlan, 1934 to 2002. The record is 605.5 mm (23.8 in) in 1942, marked on the chart; the median year is 216.4 mm (8.5 in). 02004006008001940196019802000Record: 605.5 mm (23.8 in) in 1942
The wettest five days of the year at Otatitlan, 1934 to 2002. The record is 605.5 mm (23.8 in) in 1942, marked on the chart; the median year is 216.4 mm (8.5 in).
Wettest five days (Rx5day) at Otatitlan by year
YearWettest five days (Rx5day)
1934276.7 mm (10.9 in)
1935269.5 mm (10.6 in)
1936189.8 mm (7.5 in)
1938266.5 mm (10.5 in)
1939236.7 mm (9.3 in)
1940138.7 mm (5.5 in)
1941307.4 mm (12.1 in)
1942605.5 mm (23.8 in)
1943348.5 mm (13.7 in)
1944406.5 mm (16.0 in)
1945146.1 mm (5.8 in)
1946112.8 mm (4.4 in)
1947215.4 mm (8.5 in)
1948235.5 mm (9.3 in)
1949292.0 mm (11.5 in)
1950280.7 mm (11.1 in)
1951185.7 mm (7.3 in)
1952254.8 mm (10.0 in)
1953185.0 mm (7.3 in)
1954272.7 mm (10.7 in)
1955322.4 mm (12.7 in)
1956204.4 mm (8.0 in)
1957189.0 mm (7.4 in)
1958324.9 mm (12.8 in)
1959231.9 mm (9.1 in)
1960244.9 mm (9.6 in)
1961176.0 mm (6.9 in)
1962164.0 mm (6.5 in)
1963208.8 mm (8.2 in)
1964169.4 mm (6.7 in)
1965168.2 mm (6.6 in)
1966248.2 mm (9.8 in)
1967173.7 mm (6.8 in)
1968258.6 mm (10.2 in)
1969336.3 mm (13.2 in)
1970256.6 mm (10.1 in)
1971210.8 mm (8.3 in)
1972232.4 mm (9.1 in)
1973224.1 mm (8.8 in)
1974216.4 mm (8.5 in)
1975253.6 mm (10.0 in)
1976202.8 mm (8.0 in)
1977166.7 mm (6.6 in)
1978338.9 mm (13.3 in)
1979180.6 mm (7.1 in)
1980160.2 mm (6.3 in)
1981282.9 mm (11.1 in)
1982246.4 mm (9.7 in)
1983143.8 mm (5.7 in)
1984221.3 mm (8.7 in)
1985200.7 mm (7.9 in)
1986121.3 mm (4.8 in)
1987150.1 mm (5.9 in)
1988242.1 mm (9.5 in)
1989130.9 mm (5.2 in)
199099.1 mm (3.9 in)
1998238.2 mm (9.4 in)
1999199.8 mm (7.9 in)
2000180.9 mm (7.1 in)
2001197.4 mm (7.8 in)
2002109.8 mm (4.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Otatitlan by year The longest dry spell of the year at Otatitlan, 1934 to 2002. The record is 106 days in 2002, marked on the chart; the median year is 33 days. 02550751001251940196019802000Record: 106 days in 2002
The longest dry spell of the year at Otatitlan, 1934 to 2002. The record is 106 days in 2002, marked on the chart; the median year is 33 days.
Longest dry spell (CDD) at Otatitlan by year
YearLongest dry spell (CDD)
193422 days
193532 days
193626 days
193820 days
193939 days
194030 days
194133 days
194228 days
194329 days
194431 days
194562 days
194631 days
194728 days
194819 days
194934 days
195026 days
195131 days
195222 days
195348 days
195438 days
195530 days
195618 days
195733 days
195838 days
195925 days
196029 days
196149 days
196234 days
196357 days
196430 days
196547 days
196641 days
196731 days
196825 days
196926 days
197052 days
197134 days
197232 days
197333 days
197438 days
197538 days
197646 days
197734 days
197825 days
197926 days
198042 days
198136 days
198240 days
198388 days
198427 days
198532 days
198640 days
198729 days
198839 days
198946 days
199018 days
199843 days
199951 days
200054 days
200146 days
2002106 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

54 years, 1935 to 2002

A day with at least 111.5 mm (4.4 in) of rain is expected about once in 2 years. A day with at least 298.0 mm (11.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Otatitlan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years111.5 mm (4.4 in)
5 years152.5 mm (6.0 in)
10 years182.9 mm (7.2 in)
25 years225.5 mm (8.9 in)
50 years260.3 mm (10.2 in)
100 years298.0 mm (11.7 in)Longer than the 54 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, 54 years of values from 1935 to 2002.

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: 286.8 mm (11.3 in) in 1978; 241.8 mm (9.5 in) in 1942; 206.5 mm (8.1 in) in 1943.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

  • Data for Otatitlan standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Otatitlan 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).