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Tomatlan Weather Records (MXN00014152)

Record envelope, standing records and threshold days for Tomatlan (MXN00014152), Mexico, with 66 years of record.

Key Facts for Tomatlan

  • Tomatlan (MXN00014152) is a weather station in Mexico at 19.93 latitude and -105.23 longitude, 50 m (164 ft) above sea level.
  • The station reports from 1940 to 2005, 66 years of record.
  • 1,464 records set at Tomatlan still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Tomatlan tied a daily record high minimum temperature of 23.9 C (75.0 F) on 27 May 2004.

About the Station

  • Location: Mexico, 19.93 latitude, -105.23 longitude.
  • Elevation: 50 m (164 ft).
  • Period of record: 1940 to 2005, 66 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 Tomatlan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Tomatlan. 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 Tomatlan. 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 Tomatlan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan38.9 C (102.0 F)3.3 C (37.9 F)n/an/a
Feb38.9 C (102.0 F)3.9 C (39.0 F)n/an/a
Mar39.4 C (102.9 F)3.3 C (37.9 F)n/an/a
Apr46.1 C (115.0 F)6.1 C (43.0 F)n/an/a
May45.0 C (113.0 F)10.0 C (50.0 F)n/an/a
Jun45.0 C (113.0 F)12.2 C (54.0 F)n/an/a
Jul43.3 C (109.9 F)15.0 C (59.0 F)n/an/a
Aug38.3 C (100.9 F)15.0 C (59.0 F)n/an/a
Sep40.0 C (104.0 F)15.6 C (60.1 F)n/an/a
Oct40.0 C (104.0 F)11.7 C (53.1 F)n/an/a
Nov40.0 C (104.0 F)5.6 C (42.1 F)n/an/a
Dec39.4 C (102.9 F)0.6 C (33.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Tomatlan by the year they were set 1,464 records at Tomatlan still stand. 1942 holds the most, with 408. 02004006001940: 141941: 211942: 4081943: 91950: 11951: 111952: 301953: 231954: 371955: 101956: 331957: 231958: 241959: 141960: 171961: 731962: 161963: 281964: 41965: 121966: 131967: 111968: 261969: 221970: 91971: 101972: 501973: 171974: 131975: 31976: 261977: 191978: 161979: 461980: 331981: 71982: 11984: 151985: 31986: 21987: 891988: 341989: 171990: 271991: 131992: 211993: 121994: 91995: 121996: 31997: 251998: 101999: 92000: 62001: 132002: 62003: 32004: 51940195219581964197019761982198919952001
1,464 records at Tomatlan still stand. 1942 holds the most, with 408.
Standing records at Tomatlan by the year they were set
Year setStanding records
194014
194121
1942408
19439
19501
195111
195230
195323
195437
195510
195633
195723
195824
195914
196017
196173
196216
196328
19644
196512
196613
196711
196826
196922
19709
197110
197250
197317
197413
19753
197626
197719
197816
197946
198033
19817
19821
198415
19853
19862
198789
198834
198917
199027
199113
199221
199312
19949
199512
19963
199725
199810
19999
20006
200113
20026
20033
20045

All-Time Record Progression

3 new records
When Tomatlan set new all-time records 3 all-time records were set at Tomatlan between 3 July 1987 and 4 September 1999. Each dot is a new record. Record high minimum temperatureRecord low maximum temperatureRecord daily precipitation3 July 1987: Record high minimum temperature 27.8 C (82.0 F)16 January 1992: Record low maximum temperature 18.9 C (66.0 F)4 September 1999: Record daily precipitation 180.8 mm (7.1 in)199019952000
3 all-time records were set at Tomatlan between 3 July 1987 and 4 September 1999. Each dot is a new record.
When Tomatlan set new all-time records
DateKindDetail
1987-07-03Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)
1992-01-16Record low maximum temperatureRecord low maximum temperature 18.9 C (66.0 F)
1999-09-04Record daily precipitationRecord daily precipitation 180.8 mm (7.1 in)

Wettest Day of Each Month

Sep: 180.8 mm (7.1 in)
Record daily precipitation for each month at Tomatlan The wettest day on record for each calendar month at Tomatlan. The most was 180.8 mm (7.1 in) on 4 September 1999. 050100150200 Jan: 98.0 mm (3.9 in), 8 January 1973 Jan Feb: 45.0 mm (1.8 in), 11 February 1966 Feb Mar: 87.6 mm (3.4 in), 4 March 1968 Mar Apr: 59.9 mm (2.4 in), 17 April 1959 Apr May: 61.0 mm (2.4 in), 31 May 1952 May Jun: 96.3 mm (3.8 in), 22 June 1993 Jun Jul: 130.8 mm (5.1 in), 2 July 1953 Jul Aug: 180.3 mm (7.1 in), 24 August 1951 Aug Sep: 180.8 mm (7.1 in), 4 September 1999 Sep Oct: 117.3 mm (4.6 in), 13 October 1994 Oct Nov: 116.3 mm (4.6 in), 11 November 1997 Nov Dec: 121.9 mm (4.8 in), 26 December 1974 Dec
The wettest day on record for each calendar month at Tomatlan. The most was 180.8 mm (7.1 in) on 4 September 1999.
Record daily precipitation for each month at Tomatlan
MonthRecord daily precipitation (mm)Date
Jan98.0 mm (3.9 in)8 January 1973
Feb45.0 mm (1.8 in)11 February 1966
Mar87.6 mm (3.4 in)4 March 1968
Apr59.9 mm (2.4 in)17 April 1959
May61.0 mm (2.4 in)31 May 1952
Jun96.3 mm (3.8 in)22 June 1993
Jul130.8 mm (5.1 in)2 July 1953
Aug180.3 mm (7.1 in)24 August 1951
Sep180.8 mm (7.1 in)4 September 1999
Oct117.3 mm (4.6 in)13 October 1994
Nov116.3 mm (4.6 in)11 November 1997
Dec121.9 mm (4.8 in)26 December 1974

Period of Record Coverage

1940 to 2004
Days with data per year at Tomatlan 58 years of record at Tomatlan, 1940 to 2004. 13 years have data for under 90 percent of days and are left out of rankings: 1941, 1943, 1950, 1954, 1977, 1981, 1982, 1985 and others. 1940: 366 of 366 days1941: 89 of 365 days1942: 351 of 365 days1943: 119 of 365 days1950: 92 of 365 days1951: 364 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 304 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 334 of 366 days1961: 344 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 335 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 364 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 364 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 260 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 362 of 366 days1981: 117 of 365 days1982: 28 of 365 days1984: 361 of 366 days1985: 62 of 365 days1986: 62 of 365 days1987: 357 of 365 days1988: 339 of 366 days1989: 342 of 365 days1990: 336 of 365 days1991: 328 of 365 days1992: 342 of 366 days1993: 360 of 365 days1994: 354 of 365 days1995: 340 of 365 days1996: 317 of 366 days1997: 362 of 365 days1998: 342 of 365 days1999: 363 of 365 days2000: 243 of 366 days2001: 337 of 365 days2002: 365 of 365 days2003: 335 of 365 days2004: 152 of 366 days1940195019601970198019902000
58 years of record at Tomatlan, 1940 to 2004. 13 years have data for under 90 percent of days and are left out of rankings: 1941, 1943, 1950, 1954, 1977, 1981, 1982, 1985 and others.
Days with data per year at Tomatlan
YearDays with dataShare of yearComplete
1940366100%Yes
19418924%No
194235196%Yes
194311933%No
19509225%No
1951364100%Yes
1952366100%Yes
1953365100%Yes
195430483%No
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
196033491%Yes
196134494%Yes
1962365100%Yes
1963365100%Yes
196433592%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
196836499%Yes
1969364100%Yes
1970365100%Yes
1971364100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
197726071%No
1978365100%Yes
1979365100%Yes
198036299%Yes
198111732%No
1982288%No
198436199%Yes
19856217%No
19866217%No
198735798%Yes
198833993%Yes
198934294%Yes
199033692%Yes
199132890%No
199234293%Yes
199336099%Yes
199435497%Yes
199534093%Yes
199631787%No
199736299%Yes
199834294%Yes
199936399%Yes
200024366%No
200133792%Yes
2002365100%Yes
200333592%Yes
200415242%No

Latest Records

20
Latest records at Tomatlan
DateStationRecordValueBeat old record byOld record stoodSignificance
27 May 2004Tomatlan, MXdaily high min (Tie)23.9 C (75.0 F)tie32 years3 of 100 (Routine)
25 May 2004Tomatlan, MXdaily rain0.8 mm (0.03 in)0.8 mm (0.03 in)64 years20 of 100 (Routine)
29 February 2004Tomatlan, MXdaily low min9.4 C (48.9 F)1.2 C (2.2 F)24 years17 of 100 (Routine)
26 February 2004Tomatlan, MXdaily low min8.9 C (48.0 F)1.7 C (3.1 F)9 years14 of 100 (Routine)
25 February 2004Tomatlan, MXdaily low min (Tie)8.9 C (48.0 F)tie9 years2 of 100 (Routine)
17 February 2004Tomatlan, MXdaily low min6.7 C (44.1 F)2.2 C (4.0 F)24 years21 of 100 (Routine)
16 February 2004Tomatlan, MXdaily low min6.7 C (44.1 F)1.1 C (2.0 F)61 years28 of 100 (Routine)
16 January 2004Tomatlan, MXdaily rain19.6 mm (0.8 in)9.7 mm (0.38 in)12 years13 of 100 (Routine)
15 January 2004Tomatlan, MXdaily low max24.4 C (75.9 F)0.6 C (1.1 F)61 years26 of 100 (Routine)
15 January 2004Tomatlan, MXdaily rain46.5 mm (1.8 in)6.9 mm (0.27 in)12 years12 of 100 (Routine)
15 October 2003Tomatlan, MXdaily low max25.0 C (77.0 F)1.7 C (3.1 F)60 years31 of 100 (Routine)
7 October 2003Tomatlan, MXdaily rain80.3 mm (3.2 in)60.5 mm (2.4 in)36 years44 of 100 (Notable)
7 October 2003Tomatlan, MXdaily low max (Tie)26.1 C (79.0 F)tie60 years6 of 100 (Routine)
3 October 2003Tomatlan, MXdaily low max (Tie)24.4 C (75.9 F)tie33 years4 of 100 (Routine)
2 October 2003Tomatlan, MXdaily low max24.4 C (75.9 F)1.7 C (3.1 F)60 years31 of 100 (Routine)
17 September 2003Tomatlan, MXdaily rain125.0 mm (4.9 in)63.0 mm (2.5 in)29 years43 of 100 (Notable)
17 September 2003Tomatlan, MXdaily high max (Tie)36.1 C (97.0 F)tie46 years5 of 100 (Routine)
21 August 2003Tomatlan, MXdaily low max27.2 C (81.0 F)0.6 C (1.1 F)60 years27 of 100 (Routine)
1 August 2003Tomatlan, MXdaily rain46.0 mm (1.8 in)25.2 mm (1.0 in)52 years35 of 100 (Notable)
27 June 2003Tomatlan, MXdaily rain31.0 mm (1.2 in)2.0 mm (0.08 in)10 years10 of 100 (Routine)

Climate Trend

39 complete years, 1940 to 2002
Annual mean temperature at Tomatlan as warming stripes, 1940 to 2002 One stripe for each of 39 complete years at Tomatlan, 1940 to 2002. Blue stripes are years cooler than the station's own mean of 26.3 C (79.4 F); red stripes are warmer. The coolest year was 1999, at 25.2 C (77.4 F), and the warmest was 1961, at 27.5 C (81.5 F). The strongest colour marks a difference of 1.2 C (2.2 F). 1940: 25.6 C, -0.7 C from the station mean1951: 26.1 C, -0.3 C from the station mean1952: 26.3 C, -0.1 C from the station mean1953: 26.7 C, +0.4 C from the station mean1955: 26.3 C, -0.1 C from the station mean1956: 26.9 C, +0.6 C from the station mean1957: 26.9 C, +0.6 C from the station mean1958: 26.8 C, +0.5 C from the station mean1959: 27.0 C, +0.7 C from the station mean1961: 27.5 C, +1.2 C from the station mean1962: 26.7 C, +0.4 C from the station mean1963: 26.6 C, +0.3 C from the station mean1965: 26.5 C, +0.1 C from the station mean1966: 26.2 C, -0.1 C from the station mean1967: 26.3 C, 0.0 C from the station mean1968: 26.8 C, +0.4 C from the station mean1969: 26.7 C, +0.3 C from the station mean1970: 25.6 C, -0.7 C from the station mean1971: 25.9 C, -0.4 C from the station mean1972: 27.2 C, +0.8 C from the station mean1973: 26.5 C, +0.1 C from the station mean1974: 25.8 C, -0.5 C from the station mean1975: 26.2 C, -0.1 C from the station mean1976: 26.9 C, +0.6 C from the station mean1978: 25.5 C, -0.8 C from the station mean1979: 26.1 C, -0.3 C from the station mean1980: 26.3 C, 0.0 C from the station mean1984: 26.4 C, +0.1 C from the station mean1987: 25.9 C, -0.4 C from the station mean1988: 26.1 C, -0.3 C from the station mean1989: 26.2 C, -0.1 C from the station mean1992: 26.7 C, +0.4 C from the station mean1993: 25.9 C, -0.4 C from the station mean1994: 26.4 C, 0.0 C from the station mean1995: 26.4 C, +0.1 C from the station mean1997: 26.1 C, -0.2 C from the station mean1998: 25.8 C, -0.5 C from the station mean1999: 25.2 C, -1.1 C from the station mean2002: 26.0 C, -0.4 C from the station mean1940195019601970198019902000
One stripe for each of 39 complete years at Tomatlan, 1940 to 2002. Blue stripes are years cooler than the station's own mean of 26.3 C (79.4 F); red stripes are warmer. The coolest year was 1999, at 25.2 C (77.4 F), and the warmest was 1961, at 27.5 C (81.5 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Tomatlan as warming stripes, 1940 to 2002
YearAnnual mean temperatureDifference from the station mean
194025.6 C-0.69 C
195126.1 C-0.26 C
195226.3 C-0.08 C
195326.7 C+0.37 C
195526.3 C-0.07 C
195626.9 C+0.57 C
195726.9 C+0.61 C
195826.8 C+0.50 C
195927.0 C+0.66 C
196127.5 C+1.15 C
196226.7 C+0.38 C
196326.6 C+0.29 C
196526.5 C+0.13 C
196626.2 C-0.12 C
196726.3 C-0.03 C
196826.8 C+0.44 C
196926.7 C+0.33 C
197025.6 C-0.72 C
197125.9 C-0.43 C
197227.2 C+0.82 C
197326.5 C+0.14 C
197425.8 C-0.53 C
197526.2 C-0.11 C
197626.9 C+0.56 C
197825.5 C-0.85 C
197926.1 C-0.26 C
198026.3 C-0.05 C
198426.4 C+0.05 C
198725.9 C-0.44 C
198826.1 C-0.28 C
198926.2 C-0.09 C
199226.7 C+0.39 C
199325.9 C-0.39 C
199426.4 C+0.04 C
199526.4 C+0.11 C
199726.1 C-0.19 C
199825.8 C-0.50 C
199925.2 C-1.10 C
200226.0 C-0.36 C

The annual mean temperature here has fallen by 0.11 C (0.01 to 0.20) per decade over 1940 to 2002. In Fahrenheit: 0.20 F (0.02 to 0.37) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Tomatlan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.11 C (-0.20 to -0.01) per decade-0.20 F (-0.37 to -0.02) per decade1940 to 200239Fall
Mean daily maximum-0.1 C (-0.2 to 0.1) per decade-0.1 F (-0.4 to 0.1) per decade1940 to 200239Not clearly different from zero
Mean daily minimum-0.14 C (-0.26 to -0.01) per decade-0.24 F (-0.48 to -0.02) per decade1940 to 200239Fall

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

1940 to 2005
Yearly extremes at Tomatlan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.1 C (115.0 F)196138.6 C (101.5 F)58
Coldest night (TNn)0.6 C (33.1 F)19429.4 C (48.9 F)58
Wettest day (Rx1day)180.8 mm (7.1 in)199980.3 mm (3.2 in)59
Wettest five days (Rx5day)417.3 mm (16.4 in)1999137.3 mm (5.4 in)59
Longest dry spell (CDD)175 days1962122 days59

Hottest day (TXx)

Hottest day (TXx) at Tomatlan by year The hottest day of the year at Tomatlan, 1940 to 2005. The record is 46.1 C (115.0 F) in 1961, marked on the chart; the median year is 38.6 C (101.5 F). 354045501940196019802000Record: 46.1 C (115.0 F) in 1961
The hottest day of the year at Tomatlan, 1940 to 2005. The record is 46.1 C (115.0 F) in 1961, marked on the chart; the median year is 38.6 C (101.5 F).
Hottest day (TXx) at Tomatlan by year
YearHottest day (TXx)
194037.8 C (100.0 F)
194136.7 C (98.1 F)
194235.0 C (95.0 F)
194338.9 C (102.0 F)
195036.1 C (97.0 F)
195138.3 C (100.9 F)
195238.9 C (102.0 F)
195339.4 C (102.9 F)
195438.3 C (100.9 F)
195537.2 C (99.0 F)
195640.0 C (104.0 F)
195738.9 C (102.0 F)
195839.4 C (102.9 F)
195937.2 C (99.0 F)
196038.3 C (100.9 F)
196146.1 C (115.0 F)
196238.9 C (102.0 F)
196338.3 C (100.9 F)
196438.3 C (100.9 F)
196539.4 C (102.9 F)
196638.3 C (100.9 F)
196738.3 C (100.9 F)
196839.4 C (102.9 F)
196940.0 C (104.0 F)
197038.9 C (102.0 F)
197136.7 C (98.1 F)
197238.3 C (100.9 F)
197338.3 C (100.9 F)
197438.3 C (100.9 F)
197536.7 C (98.1 F)
197640.0 C (104.0 F)
197737.8 C (100.0 F)
197837.8 C (100.0 F)
197940.6 C (105.1 F)
198040.6 C (105.1 F)
198140.0 C (104.0 F)
198235.0 C (95.0 F)
198440.6 C (105.1 F)
198536.1 C (97.0 F)
198638.9 C (102.0 F)
198740.0 C (104.0 F)
198840.0 C (104.0 F)
198938.9 C (102.0 F)
199040.0 C (104.0 F)
199138.9 C (102.0 F)
199240.0 C (104.0 F)
199337.8 C (100.0 F)
199437.8 C (100.0 F)
199538.9 C (102.0 F)
199638.9 C (102.0 F)
199738.9 C (102.0 F)
199838.9 C (102.0 F)
199937.2 C (99.0 F)
200038.3 C (100.9 F)
200138.3 C (100.9 F)
200240.0 C (104.0 F)
200337.8 C (100.0 F)
200436.7 C (98.1 F)
2005n/a

Coldest night (TNn)

Coldest night (TNn) at Tomatlan by year The coldest night of the year at Tomatlan, 1940 to 2005. The record is 0.6 C (33.1 F) in 1942, marked on the chart; the median year is 9.4 C (48.9 F). 0510151940196019802000Record: 0.6 C (33.1 F) in 1942
The coldest night of the year at Tomatlan, 1940 to 2005. The record is 0.6 C (33.1 F) in 1942, marked on the chart; the median year is 9.4 C (48.9 F).
Coldest night (TNn) at Tomatlan by year
YearColdest night (TNn)
194010.0 C (50.0 F)
194110.6 C (51.1 F)
19420.6 C (33.1 F)
194312.8 C (55.0 F)
195013.3 C (55.9 F)
195110.0 C (50.0 F)
19528.3 C (46.9 F)
195311.1 C (52.0 F)
195412.2 C (54.0 F)
19558.3 C (46.9 F)
195612.2 C (54.0 F)
195710.0 C (50.0 F)
195811.1 C (52.0 F)
195912.2 C (54.0 F)
19609.4 C (48.9 F)
196111.1 C (52.0 F)
196210.0 C (50.0 F)
196310.0 C (50.0 F)
19648.3 C (46.9 F)
196510.0 C (50.0 F)
19669.4 C (48.9 F)
19677.2 C (45.0 F)
19688.3 C (46.9 F)
19698.9 C (48.0 F)
19708.9 C (48.0 F)
19717.8 C (46.0 F)
19728.9 C (48.0 F)
197310.0 C (50.0 F)
19749.4 C (48.9 F)
197510.0 C (50.0 F)
197613.9 C (57.0 F)
197710.0 C (50.0 F)
197810.0 C (50.0 F)
19798.9 C (48.0 F)
19808.9 C (48.0 F)
19818.9 C (48.0 F)
198212.8 C (55.0 F)
198410.6 C (51.1 F)
198510.0 C (50.0 F)
198610.0 C (50.0 F)
19877.8 C (46.0 F)
19886.7 C (44.1 F)
198910.0 C (50.0 F)
19906.7 C (44.1 F)
19918.9 C (48.0 F)
199210.6 C (51.1 F)
19937.8 C (46.0 F)
19947.8 C (46.0 F)
19958.9 C (48.0 F)
19967.8 C (46.0 F)
19973.9 C (39.0 F)
19989.4 C (48.9 F)
19997.2 C (45.0 F)
20008.3 C (46.9 F)
200110.0 C (50.0 F)
20028.9 C (48.0 F)
200310.0 C (50.0 F)
20046.7 C (44.1 F)
2005n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Tomatlan by year The wettest day of the year at Tomatlan, 1940 to 2005. The record is 180.8 mm (7.1 in) in 1999, marked on the chart; the median year is 80.3 mm (3.2 in). 0501001502001940196019802000Record: 180.8 mm (7.1 in) in 1999
The wettest day of the year at Tomatlan, 1940 to 2005. The record is 180.8 mm (7.1 in) in 1999, marked on the chart; the median year is 80.3 mm (3.2 in).
Wettest day (Rx1day) at Tomatlan by year
YearWettest day (Rx1day)
194069.9 mm (2.8 in)
194134.8 mm (1.4 in)
194261.5 mm (2.4 in)
19430.0 mm (0.00 in)
195023.9 mm (0.9 in)
1951180.3 mm (7.1 in)
195292.2 mm (3.6 in)
1953130.8 mm (5.1 in)
1954142.7 mm (5.6 in)
195573.4 mm (2.9 in)
195680.8 mm (3.2 in)
1957100.6 mm (4.0 in)
195887.6 mm (3.4 in)
195987.9 mm (3.5 in)
196053.1 mm (2.1 in)
196147.0 mm (1.9 in)
196268.1 mm (2.7 in)
196372.1 mm (2.8 in)
196438.6 mm (1.5 in)
196566.8 mm (2.6 in)
196655.4 mm (2.2 in)
196780.3 mm (3.2 in)
196887.6 mm (3.4 in)
1969112.8 mm (4.4 in)
1970146.8 mm (5.8 in)
197197.0 mm (3.8 in)
197286.4 mm (3.4 in)
1973102.9 mm (4.1 in)
1974121.9 mm (4.8 in)
197562.0 mm (2.4 in)
197671.9 mm (2.8 in)
197785.1 mm (3.4 in)
197897.8 mm (3.9 in)
197979.8 mm (3.1 in)
198095.8 mm (3.8 in)
198111.9 mm (0.5 in)
19820.0 mm (0.00 in)
198484.1 mm (3.3 in)
198521.6 mm (0.9 in)
19860.0 mm (0.00 in)
198773.9 mm (2.9 in)
198892.5 mm (3.6 in)
198948.3 mm (1.9 in)
199069.9 mm (2.8 in)
199154.4 mm (2.1 in)
199287.9 mm (3.5 in)
1993115.6 mm (4.6 in)
1994117.3 mm (4.6 in)
199564.0 mm (2.5 in)
1996116.6 mm (4.6 in)
1997116.3 mm (4.6 in)
1998141.5 mm (5.6 in)
1999180.8 mm (7.1 in)
200046.2 mm (1.8 in)
200172.9 mm (2.9 in)
200290.7 mm (3.6 in)
2003125.0 mm (4.9 in)
200446.5 mm (1.8 in)
200524.4 mm (1.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Tomatlan by year The wettest five days of the year at Tomatlan, 1940 to 2005. The record is 417.3 mm (16.4 in) in 1999, marked on the chart; the median year is 137.3 mm (5.4 in). 02004006001940196019802000Record: 417.3 mm (16.4 in) in 1999
The wettest five days of the year at Tomatlan, 1940 to 2005. The record is 417.3 mm (16.4 in) in 1999, marked on the chart; the median year is 137.3 mm (5.4 in).
Wettest five days (Rx5day) at Tomatlan by year
YearWettest five days (Rx5day)
194087.6 mm (3.4 in)
194167.5 mm (2.7 in)
1942145.1 mm (5.7 in)
19430.0 mm (0.00 in)
195030.3 mm (1.2 in)
1951208.5 mm (8.2 in)
1952110.9 mm (4.4 in)
1953256.1 mm (10.1 in)
1954154.6 mm (6.1 in)
195594.0 mm (3.7 in)
1956110.6 mm (4.4 in)
1957200.7 mm (7.9 in)
1958161.3 mm (6.4 in)
1959183.2 mm (7.2 in)
1960120.5 mm (4.7 in)
196180.0 mm (3.1 in)
1962146.3 mm (5.8 in)
1963137.3 mm (5.4 in)
196448.1 mm (1.9 in)
196589.5 mm (3.5 in)
196693.5 mm (3.7 in)
1967146.6 mm (5.8 in)
1968147.3 mm (5.8 in)
1969161.3 mm (6.4 in)
1970166.3 mm (6.5 in)
1971161.3 mm (6.4 in)
1972183.4 mm (7.2 in)
1973174.3 mm (6.9 in)
1974140.7 mm (5.5 in)
197572.9 mm (2.9 in)
1976136.5 mm (5.4 in)
1977100.6 mm (4.0 in)
1978128.2 mm (5.0 in)
1979119.7 mm (4.7 in)
1980143.3 mm (5.6 in)
198118.5 mm (0.7 in)
19820.0 mm (0.00 in)
1984150.5 mm (5.9 in)
198557.7 mm (2.3 in)
19860.0 mm (0.00 in)
198782.8 mm (3.3 in)
1988169.5 mm (6.7 in)
198994.8 mm (3.7 in)
1990159.9 mm (6.3 in)
199182.3 mm (3.2 in)
1992163.2 mm (6.4 in)
1993147.1 mm (5.8 in)
1994152.2 mm (6.0 in)
1995151.4 mm (6.0 in)
1996154.7 mm (6.1 in)
1997134.6 mm (5.3 in)
1998239.2 mm (9.4 in)
1999417.3 mm (16.4 in)
200073.9 mm (2.9 in)
2001123.0 mm (4.8 in)
2002137.8 mm (5.4 in)
2003227.4 mm (9.0 in)
200489.0 mm (3.5 in)
200553.9 mm (2.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Tomatlan by year The longest dry spell of the year at Tomatlan, 1940 to 2005. The record is 175 days in 1962, marked on the chart; the median year is 122 days. 0501001502001940196019802000Record: 175 days in 1962
The longest dry spell of the year at Tomatlan, 1940 to 2005. The record is 175 days in 1962, marked on the chart; the median year is 122 days.
Longest dry spell (CDD) at Tomatlan by year
YearLongest dry spell (CDD)
1940148 days
194155 days
1942116 days
194361 days
195078 days
1951100 days
1952111 days
1953167 days
1954120 days
1955143 days
1956137 days
1957167 days
195893 days
1959100 days
1960161 days
1961122 days
1962175 days
196358 days
1964163 days
1965147 days
196673 days
1967129 days
1968106 days
1969173 days
1970173 days
1971162 days
1972156 days
1973119 days
1974147 days
1975133 days
1976164 days
1977120 days
1978102 days
1979129 days
1980112 days
1981167 days
198259 days
1984140 days
198531 days
198631 days
198781 days
198864 days
1989168 days
199079 days
1991167 days
199295 days
1993142 days
1994163 days
1995161 days
1996153 days
199760 days
1998115 days
1999168 days
2000148 days
2001104 days
2002114 days
200390 days
2004136 days
20052 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

47 years, 1940 to 2003

A day with at least 85.1 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 193.6 mm (7.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Tomatlan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years85.1 mm (3.4 in)
5 years113.5 mm (4.5 in)
10 years132.5 mm (5.2 in)
25 years156.9 mm (6.2 in)
50 years175.2 mm (6.9 in)Longer than the 47 years of record
100 years193.6 mm (7.6 in)Longer than the 47 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, 47 years of values from 1940 to 2003.

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: 180.8 mm (7.1 in) in 1999; 180.3 mm (7.1 in) in 1951; 146.8 mm (5.8 in) in 1970.

Download the Data

  • Data for Tomatlan standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Tomatlan 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

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