Daily records
Page built 2026-10-17
Data as of 2025-12-31
Search
Built 2026-10-17 (17 October 2026)

Comatlan Weather Records (MXN00006004)

Record envelope, standing records and threshold days for Comatlan (MXN00006004), Mexico, with 54 years of record.

Key Facts for Comatlan

  • Comatlan (MXN00006004) is a weather station in Mexico at 19.22 latitude and -104.22 longitude, 376 m (1,233 ft) above sea level.
  • The station reports from 1960 to 2013, 54 years of record.
  • 1,464 records set at Comatlan still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Comatlan tied a daily record low maximum temperature of 30.0 C (86.0 F) on 11 June 2013.

About the Station

  • Location: Mexico, 19.22 latitude, -104.22 longitude.
  • Elevation: 376 m (1,233 ft).
  • Period of record: 1960 to 2013, 54 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 Comatlan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Comatlan. 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 Comatlan. 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 Comatlan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan40.6 C (105.1 F)3.3 C (37.9 F)n/an/a
Feb42.8 C (109.0 F)3.3 C (37.9 F)n/an/a
Mar40.6 C (105.1 F)5.0 C (41.0 F)n/an/a
Apr39.4 C (102.9 F)6.7 C (44.1 F)n/an/a
May41.1 C (106.0 F)7.8 C (46.0 F)n/an/a
Jun40.0 C (104.0 F)8.9 C (48.0 F)n/an/a
Jul40.0 C (104.0 F)12.8 C (55.0 F)n/an/a
Aug40.0 C (104.0 F)12.8 C (55.0 F)n/an/a
Sep38.3 C (100.9 F)12.8 C (55.0 F)n/an/a
Oct38.9 C (102.0 F)8.9 C (48.0 F)n/an/a
Nov40.6 C (105.1 F)7.2 C (45.0 F)n/an/a
Dec40.0 C (104.0 F)5.0 C (41.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Comatlan by the year they were set 1,464 records at Comatlan still stand. 2002 holds the most, with 106. 0501001501962: 31965: 61966: 111967: 211968: 321969: 271970: 281971: 361972: 161973: 221974: 261975: 291976: 291977: 491978: 301979: 491980: 701981: 281982: 531983: 331984: 181985: 91986: 21987: 681988: 581989: 611990: 701991: 631992: 121993: 51996: 631997: 951998: 551999: 182000: 142001: 242002: 1062003: 292004: 192005: 172006: 62008: 32009: 12010: 462011: 22012: 21962196919741979198419891996200120062012
1,464 records at Comatlan still stand. 2002 holds the most, with 106.
Standing records at Comatlan by the year they were set
Year setStanding records
19623
19656
196611
196721
196832
196927
197028
197136
197216
197322
197426
197529
197629
197749
197830
197949
198070
198128
198253
198333
198418
19859
19862
198768
198858
198961
199070
199163
199212
19935
199663
199795
199855
199918
200014
200124
2002106
200329
200419
200517
20066
20083
20091
201046
20112
20122

All-Time Record Progression

3 new records
When Comatlan set new all-time records 3 all-time records were set at Comatlan between 5 September 1999 and 16 May 2002. Each dot is a new record. Record daily precipitationRecord high minimum temperature5 September 1999: Record daily precipitation 356.9 mm (14.1 in)12 May 2002: Record high minimum temperature 27.8 C (82.0 F)16 May 2002: Record high minimum temperature 28.9 C (84.0 F)2000
3 all-time records were set at Comatlan between 5 September 1999 and 16 May 2002. Each dot is a new record.
When Comatlan set new all-time records
DateKindDetail
1999-09-05Record daily precipitationRecord daily precipitation 356.9 mm (14.1 in)
2002-05-12Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)
2002-05-16Record high minimum temperatureRecord high minimum temperature 28.9 C (84.0 F)

Wettest Day of Each Month

Sep: 356.9 mm (14.1 in)
Record daily precipitation for each month at Comatlan The wettest day on record for each calendar month at Comatlan. The most was 356.9 mm (14.1 in) on 5 September 1999. 0100200300400 Jan: 167.6 mm (6.6 in), 12 January 1967 Jan Feb: 133.9 mm (5.3 in), 3 February 2010 Feb Mar: 47.8 mm (1.9 in), 4 March 1968 Mar Apr: 12.2 mm (0.5 in), 3 April 1966 Apr May: 49.8 mm (2.0 in), 29 May 1974 May Jun: 145.8 mm (5.7 in), 21 June 1990 Jun Jul: 126.0 mm (5.0 in), 5 July 2008 Jul Aug: 207.3 mm (8.2 in), 28 August 1981 Aug Sep: 356.9 mm (14.1 in), 5 September 1999 Sep Oct: 339.9 mm (13.4 in), 11 October 2011 Oct Nov: 98.8 mm (3.9 in), 25 November 1972 Nov Dec: 90.2 mm (3.6 in), 15 December 1965 Dec
The wettest day on record for each calendar month at Comatlan. The most was 356.9 mm (14.1 in) on 5 September 1999.
Record daily precipitation for each month at Comatlan
MonthRecord daily precipitation (mm)Date
Jan167.6 mm (6.6 in)12 January 1967
Feb133.9 mm (5.3 in)3 February 2010
Mar47.8 mm (1.9 in)4 March 1968
Apr12.2 mm (0.5 in)3 April 1966
May49.8 mm (2.0 in)29 May 1974
Jun145.8 mm (5.7 in)21 June 1990
Jul126.0 mm (5.0 in)5 July 2008
Aug207.3 mm (8.2 in)28 August 1981
Sep356.9 mm (14.1 in)5 September 1999
Oct339.9 mm (13.4 in)11 October 2011
Nov98.8 mm (3.9 in)25 November 1972
Dec90.2 mm (3.6 in)15 December 1965

Period of Record Coverage

1962 to 2013
Days with data per year at Comatlan 48 years of record at Comatlan, 1962 to 2013. 11 years have data for under 90 percent of days and are left out of rankings: 1962, 1965, 1986, 1991, 1992, 1993, 1996, 2002 and others. 1962: 28 of 365 days1965: 97 of 365 days1966: 359 of 365 days1967: 361 of 365 days1968: 360 of 366 days1969: 359 of 365 days1970: 364 of 365 days1971: 364 of 365 days1972: 365 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 364 of 365 days1978: 365 of 365 days1979: 361 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 332 of 366 days1985: 365 of 365 days1986: 174 of 365 days1987: 365 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 290 of 365 days1992: 99 of 366 days1993: 80 of 365 days1996: 307 of 366 days1997: 363 of 365 days1998: 354 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 363 of 365 days2002: 309 of 365 days2003: 358 of 365 days2004: 330 of 366 days2005: 356 of 365 days2006: 325 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 254 of 366 days2013: 91 of 365 days19701980199020002010
48 years of record at Comatlan, 1962 to 2013. 11 years have data for under 90 percent of days and are left out of rankings: 1962, 1965, 1986, 1991, 1992, 1993, 1996, 2002 and others.
Days with data per year at Comatlan
YearDays with dataShare of yearComplete
1962288%No
19659727%No
196635998%Yes
196736199%Yes
196836098%Yes
196935998%Yes
1970364100%Yes
1971364100%Yes
1972365100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977364100%Yes
1978365100%Yes
197936199%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
198433291%Yes
1985365100%Yes
198617448%No
1987365100%Yes
1988365100%Yes
1989365100%Yes
1990365100%Yes
199129079%No
19929927%No
19938022%No
199630784%No
199736399%Yes
199835497%Yes
1999365100%Yes
2000366100%Yes
200136399%Yes
200230985%No
200335898%Yes
200433090%Yes
200535698%Yes
200632589%No
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
201225469%No
20139125%No

Latest Records

20
Latest records at Comatlan
DateStationRecordValueBeat old record byOld record stoodSignificance
11 June 2013Comatlan, MXdaily low max (Tie)30.0 C (86.0 F)tie22 years2 of 100 (Routine)
21 April 2013Comatlan, MXdaily low min (Tie)11.7 C (53.1 F)tie47 years4 of 100 (Routine)
31 December 2012Comatlan, MXdaily rain15.0 mm (0.6 in)11.4 mm (0.4 in)30 years20 of 100 (Routine)
3 November 2012Comatlan, MXdaily rain13.0 mm (0.5 in)13.0 mm (0.5 in)52 years20 of 100 (Routine)
27 October 2012Comatlan, MXdaily rain55.9 mm (2.2 in)47.0 mm (1.9 in)35 years31 of 100 (Routine)
5 March 2012Comatlan, MXdaily high min (Tie)17.8 C (64.0 F)tie11 years2 of 100 (Routine)
16 February 2012Comatlan, MXdaily low max25.0 C (77.0 F)2.8 C (5.0 F)42 years28 of 100 (Routine)
13 February 2012Comatlan, MXdaily rain3.8 mm (0.15 in)2.8 mm (0.11 in)32 years16 of 100 (Routine)
12 February 2012Comatlan, MXdaily rain2.8 mm (0.11 in)2.8 mm (0.11 in)50 years20 of 100 (Routine)
11 February 2012Comatlan, MXdaily low max22.8 C (73.0 F)3.9 C (7.0 F)24 years28 of 100 (Routine)
2 January 2012Comatlan, MXdaily high max (Tie)33.9 C (93.0 F)tie21 years2 of 100 (Routine)
11 October 2011Comatlan, MXmonthly rain339.9 mm (13.4 in)214.9 mm (8.5 in)15 years59 of 100 (Notable)
7 October 2011Comatlan, MXdaily low max (Tie)30.0 C (86.0 F)tie42 years4 of 100 (Routine)
9 July 2011Comatlan, MXdaily rain39.9 mm (1.6 in)8.1 mm (0.32 in)17 years14 of 100 (Routine)
1 July 2011Comatlan, MXdaily rain95.0 mm (3.7 in)35.1 mm (1.4 in)21 years32 of 100 (Routine)
2 February 2011Comatlan, MXdaily low min (Tie)10.0 C (50.0 F)tie7 years1 of 100 (Routine)
31 January 2011Comatlan, MXdaily low min (Tie)10.0 C (50.0 F)tie35 years3 of 100 (Routine)
25 January 2011Comatlan, MXdaily low min8.9 C (48.0 F)1.1 C (2.0 F)29 years16 of 100 (Routine)
24 January 2011Comatlan, MXdaily low min (Tie)8.9 C (48.0 F)tie12 years2 of 100 (Routine)
17 January 2011Comatlan, MXdaily low min (Tie)10.0 C (50.0 F)tie43 years4 of 100 (Routine)

Climate Trend

34 complete years, 1966 to 2011
Annual mean temperature at Comatlan as warming stripes, 1966 to 2011 One stripe for each of 34 complete years at Comatlan, 1966 to 2011. Blue stripes are years cooler than the station's own mean of 24.4 C (75.9 F); red stripes are warmer. The coolest year was 1990, at 23.2 C (73.7 F), and the warmest was 1982, at 25.8 C (78.4 F). The strongest colour marks a difference of 1.4 C (2.5 F). 1966: 24.0 C, -0.4 C from the station mean1967: 23.6 C, -0.8 C from the station mean1968: 23.8 C, -0.6 C from the station mean1969: 23.8 C, -0.6 C from the station mean1970: 23.7 C, -0.7 C from the station mean1971: 23.4 C, -1.0 C from the station mean1972: 24.3 C, -0.1 C from the station mean1973: 24.0 C, -0.5 C from the station mean1974: 24.2 C, -0.2 C from the station mean1975: 24.2 C, -0.2 C from the station mean1976: 24.9 C, +0.5 C from the station mean1977: 25.7 C, +1.3 C from the station mean1978: 25.3 C, +0.9 C from the station mean1979: 25.2 C, +0.8 C from the station mean1980: 25.6 C, +1.2 C from the station mean1981: 24.2 C, -0.2 C from the station mean1982: 25.8 C, +1.4 C from the station mean1983: 24.2 C, -0.2 C from the station mean1985: 23.9 C, -0.5 C from the station mean1987: 24.4 C, 0.0 C from the station mean1988: 24.7 C, +0.3 C from the station mean1989: 23.3 C, -1.2 C from the station mean1990: 23.2 C, -1.2 C from the station mean1998: 25.7 C, +1.3 C from the station mean1999: 24.0 C, -0.4 C from the station mean2000: 24.2 C, -0.3 C from the station mean2001: 25.3 C, +0.9 C from the station mean2003: 25.0 C, +0.6 C from the station mean2005: 24.3 C, -0.1 C from the station mean2007: 24.8 C, +0.3 C from the station mean2008: 24.5 C, 0.0 C from the station mean2009: 24.7 C, +0.3 C from the station mean2010: 23.5 C, -1.0 C from the station mean2011: 24.6 C, +0.2 C from the station mean1966197019751980198519901995200020052010
One stripe for each of 34 complete years at Comatlan, 1966 to 2011. Blue stripes are years cooler than the station's own mean of 24.4 C (75.9 F); red stripes are warmer. The coolest year was 1990, at 23.2 C (73.7 F), and the warmest was 1982, at 25.8 C (78.4 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Comatlan as warming stripes, 1966 to 2011
YearAnnual mean temperatureDifference from the station mean
196624.0 C-0.44 C
196723.6 C-0.77 C
196823.8 C-0.59 C
196923.8 C-0.63 C
197023.7 C-0.73 C
197123.4 C-1.00 C
197224.3 C-0.08 C
197324.0 C-0.45 C
197424.2 C-0.17 C
197524.2 C-0.17 C
197624.9 C+0.52 C
197725.7 C+1.26 C
197825.3 C+0.87 C
197925.2 C+0.81 C
198025.6 C+1.22 C
198124.2 C-0.19 C
198225.8 C+1.38 C
198324.2 C-0.18 C
198523.9 C-0.48 C
198724.4 C-0.01 C
198824.7 C+0.31 C
198923.3 C-1.16 C
199023.2 C-1.22 C
199825.7 C+1.28 C
199924.0 C-0.41 C
200024.2 C-0.25 C
200125.3 C+0.92 C
200325.0 C+0.63 C
200524.3 C-0.10 C
200724.8 C+0.35 C
200824.5 C+0.04 C
200924.7 C+0.27 C
201023.5 C-0.95 C
201124.6 C+0.20 C

The fitted trend in annual mean temperature here over 1966 to 2011 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.2 to 0.5) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Comatlan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.1 C (-0.1 to 0.3) per decade0.2 F (-0.2 to 0.5) per decade1966 to 201134Not clearly different from zero
Mean daily maximum0.1 C (-0.1 to 0.4) per decade0.3 F (-0.2 to 0.7) per decade1966 to 201134Not clearly different from zero
Mean daily minimum0.03 C (-0.22 to 0.28) per decade0.05 F (-0.40 to 0.50) per decade1966 to 201134Not 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

1960 to 2013
Yearly extremes at Comatlan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.8 C (109.0 F)199736.7 C (98.1 F)48
Coldest night (TNn)3.3 C (37.9 F)19668.9 C (48.0 F)48
Wettest day (Rx1day)356.9 mm (14.1 in)199978.0 mm (3.1 in)53
Wettest five days (Rx5day)469.5 mm (18.5 in)1999141.7 mm (5.6 in)53
Longest dry spell (CDD)190 days2000126 days53

Hottest day (TXx)

Hottest day (TXx) at Comatlan by year The hottest day of the year at Comatlan, 1960 to 2013. The record is 42.8 C (109.0 F) in 1997, marked on the chart; the median year is 36.7 C (98.1 F). 32.53537.54042.545196019701980199020002010Record: 42.8 C (109.0 F) in 1997
The hottest day of the year at Comatlan, 1960 to 2013. The record is 42.8 C (109.0 F) in 1997, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Comatlan by year
YearHottest day (TXx)
1960n/a
1961n/a
196236.7 C (98.1 F)
1963n/a
1964n/a
196536.7 C (98.1 F)
196636.7 C (98.1 F)
196735.0 C (95.0 F)
196835.6 C (96.1 F)
196935.6 C (96.1 F)
197035.0 C (95.0 F)
197135.0 C (95.0 F)
197237.2 C (99.0 F)
197337.2 C (99.0 F)
197437.2 C (99.0 F)
197535.6 C (96.1 F)
197637.2 C (99.0 F)
197739.4 C (102.9 F)
197839.4 C (102.9 F)
197939.4 C (102.9 F)
198041.1 C (106.0 F)
198135.6 C (96.1 F)
198237.2 C (99.0 F)
198335.0 C (95.0 F)
198436.7 C (98.1 F)
198536.7 C (98.1 F)
198638.9 C (102.0 F)
198735.6 C (96.1 F)
198840.0 C (104.0 F)
198938.9 C (102.0 F)
199038.9 C (102.0 F)
199140.6 C (105.1 F)
199238.9 C (102.0 F)
199336.7 C (98.1 F)
1995n/a
199640.0 C (104.0 F)
199742.8 C (109.0 F)
199838.9 C (102.0 F)
199937.8 C (100.0 F)
200036.7 C (98.1 F)
200137.8 C (100.0 F)
200237.8 C (100.0 F)
200336.7 C (98.1 F)
200436.7 C (98.1 F)
200536.7 C (98.1 F)
200636.7 C (98.1 F)
200735.6 C (96.1 F)
200835.6 C (96.1 F)
200935.0 C (95.0 F)
201035.0 C (95.0 F)
201135.6 C (96.1 F)
201233.9 C (93.0 F)
201335.6 C (96.1 F)

Coldest night (TNn)

Coldest night (TNn) at Comatlan by year The coldest night of the year at Comatlan, 1960 to 2013. The record is 3.3 C (37.9 F) in 1966, marked on the chart; the median year is 8.9 C (48.0 F). 051015196019701980199020002010Record: 3.3 C (37.9 F) in 1966
The coldest night of the year at Comatlan, 1960 to 2013. The record is 3.3 C (37.9 F) in 1966, marked on the chart; the median year is 8.9 C (48.0 F).
Coldest night (TNn) at Comatlan by year
YearColdest night (TNn)
1960n/a
1961n/a
196211.7 C (53.1 F)
1963n/a
1964n/a
196513.9 C (57.0 F)
19663.3 C (37.9 F)
19673.3 C (37.9 F)
19685.6 C (42.1 F)
19697.8 C (46.0 F)
19707.8 C (46.0 F)
19716.7 C (44.1 F)
19726.7 C (44.1 F)
19736.7 C (44.1 F)
19747.8 C (46.0 F)
19755.0 C (41.0 F)
19765.6 C (42.1 F)
19776.7 C (44.1 F)
19788.3 C (46.9 F)
19797.2 C (45.0 F)
19808.3 C (46.9 F)
19819.4 C (48.9 F)
19829.4 C (48.9 F)
19838.3 C (46.9 F)
19849.4 C (48.9 F)
198510.0 C (50.0 F)
198612.8 C (55.0 F)
198710.6 C (51.1 F)
198810.0 C (50.0 F)
198910.0 C (50.0 F)
19905.0 C (41.0 F)
19916.7 C (44.1 F)
199210.0 C (50.0 F)
199310.0 C (50.0 F)
1995n/a
19968.9 C (48.0 F)
19978.9 C (48.0 F)
19987.8 C (46.0 F)
19995.0 C (41.0 F)
20008.9 C (48.0 F)
200111.7 C (53.1 F)
200212.8 C (55.0 F)
200312.8 C (55.0 F)
20046.7 C (44.1 F)
20058.9 C (48.0 F)
200610.0 C (50.0 F)
200710.0 C (50.0 F)
200810.0 C (50.0 F)
200910.0 C (50.0 F)
201010.0 C (50.0 F)
20118.9 C (48.0 F)
201210.6 C (51.1 F)
201310.6 C (51.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Comatlan by year The wettest day of the year at Comatlan, 1960 to 2013. The record is 356.9 mm (14.1 in) in 1999, marked on the chart; the median year is 78.0 mm (3.1 in). 0100200300400196019701980199020002010Record: 356.9 mm (14.1 in) in 1999
The wettest day of the year at Comatlan, 1960 to 2013. The record is 356.9 mm (14.1 in) in 1999, marked on the chart; the median year is 78.0 mm (3.1 in).
Wettest day (Rx1day) at Comatlan by year
YearWettest day (Rx1day)
196043.7 mm (1.7 in)
196169.9 mm (2.8 in)
196293.0 mm (3.7 in)
196354.1 mm (2.1 in)
196470.1 mm (2.8 in)
196597.0 mm (3.8 in)
196678.0 mm (3.1 in)
1967167.6 mm (6.6 in)
196898.8 mm (3.9 in)
1969113.3 mm (4.5 in)
197098.8 mm (3.9 in)
1971159.8 mm (6.3 in)
197298.8 mm (3.9 in)
197338.9 mm (1.5 in)
1974165.9 mm (6.5 in)
197568.8 mm (2.7 in)
197676.2 mm (3.0 in)
197738.9 mm (1.5 in)
1978120.7 mm (4.8 in)
197957.2 mm (2.3 in)
198056.1 mm (2.2 in)
1981207.3 mm (8.2 in)
198267.3 mm (2.6 in)
198382.3 mm (3.2 in)
198447.5 mm (1.9 in)
198572.4 mm (2.9 in)
198629.5 mm (1.2 in)
198739.9 mm (1.6 in)
198885.9 mm (3.4 in)
198979.8 mm (3.1 in)
1990145.8 mm (5.7 in)
199164.8 mm (2.6 in)
199268.8 mm (2.7 in)
199331.8 mm (1.3 in)
199571.9 mm (2.8 in)
1996125.0 mm (4.9 in)
1997104.9 mm (4.1 in)
1998102.9 mm (4.1 in)
1999356.9 mm (14.1 in)
200047.8 mm (1.9 in)
200149.8 mm (2.0 in)
200270.6 mm (2.8 in)
200332.8 mm (1.3 in)
200482.3 mm (3.2 in)
200563.5 mm (2.5 in)
200699.8 mm (3.9 in)
200780.5 mm (3.2 in)
2008126.0 mm (5.0 in)
200981.8 mm (3.2 in)
2010133.9 mm (5.3 in)
2011339.9 mm (13.4 in)
201255.9 mm (2.2 in)
201326.9 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Comatlan by year The wettest five days of the year at Comatlan, 1960 to 2013. The record is 469.5 mm (18.5 in) in 1999, marked on the chart; the median year is 141.7 mm (5.6 in). 0200400600196019701980199020002010Record: 469.5 mm (18.5 in) in 1999
The wettest five days of the year at Comatlan, 1960 to 2013. The record is 469.5 mm (18.5 in) in 1999, marked on the chart; the median year is 141.7 mm (5.6 in).
Wettest five days (Rx5day) at Comatlan by year
YearWettest five days (Rx5day)
196078.4 mm (3.1 in)
1961111.3 mm (4.4 in)
1962171.5 mm (6.8 in)
196367.6 mm (2.7 in)
1964150.6 mm (5.9 in)
1965126.5 mm (5.0 in)
1966129.4 mm (5.1 in)
1967269.5 mm (10.6 in)
1968190.0 mm (7.5 in)
1969169.7 mm (6.7 in)
1970132.1 mm (5.2 in)
1971327.0 mm (12.9 in)
1972168.5 mm (6.6 in)
197390.5 mm (3.6 in)
1974189.6 mm (7.5 in)
1975189.3 mm (7.5 in)
1976121.9 mm (4.8 in)
197775.0 mm (3.0 in)
1978323.7 mm (12.7 in)
1979119.7 mm (4.7 in)
1980145.5 mm (5.7 in)
1981337.4 mm (13.3 in)
1982115.6 mm (4.6 in)
1983194.9 mm (7.7 in)
198493.5 mm (3.7 in)
198592.9 mm (3.7 in)
198656.9 mm (2.2 in)
1987104.7 mm (4.1 in)
1988172.8 mm (6.8 in)
1989147.7 mm (5.8 in)
1990199.4 mm (7.9 in)
1991116.6 mm (4.6 in)
199277.8 mm (3.1 in)
199348.6 mm (1.9 in)
1995183.6 mm (7.2 in)
1996249.7 mm (9.8 in)
1997190.5 mm (7.5 in)
1998203.5 mm (8.0 in)
1999469.5 mm (18.5 in)
2000106.7 mm (4.2 in)
2001105.4 mm (4.1 in)
2002153.6 mm (6.0 in)
200380.5 mm (3.2 in)
2004134.6 mm (5.3 in)
2005128.6 mm (5.1 in)
2006206.8 mm (8.1 in)
2007134.6 mm (5.3 in)
2008224.1 mm (8.8 in)
2009141.7 mm (5.6 in)
2010261.0 mm (10.3 in)
2011405.1 mm (15.9 in)
201291.3 mm (3.6 in)
201352.6 mm (2.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Comatlan by year The longest dry spell of the year at Comatlan, 1960 to 2013. The record is 190 days in 2000, marked on the chart; the median year is 126 days. 050100150200196019701980199020002010Record: 190 days in 2000
The longest dry spell of the year at Comatlan, 1960 to 2013. The record is 190 days in 2000, marked on the chart; the median year is 126 days.
Longest dry spell (CDD) at Comatlan by year
YearLongest dry spell (CDD)
196049 days
196160 days
196279 days
196388 days
1964103 days
196560 days
196641 days
1967106 days
196855 days
1969179 days
1970152 days
1971159 days
1972148 days
1973149 days
1974146 days
1975133 days
1976140 days
197796 days
1978118 days
1979154 days
1980112 days
1981150 days
1982170 days
1983126 days
1984179 days
1985150 days
198659 days
1987183 days
1988169 days
1989168 days
199094 days
1991167 days
199235 days
199331 days
199544 days
199678 days
199765 days
199880 days
1999165 days
2000190 days
2001186 days
2002151 days
2003151 days
2004123 days
2005111 days
2006158 days
2007125 days
2008160 days
2009137 days
2010112 days
2011170 days
201257 days
201371 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, 1961 to 2011

A day with at least 81.2 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 382.7 mm (15.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Comatlan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years81.2 mm (3.2 in)
5 years127.6 mm (5.0 in)
10 years168.8 mm (6.6 in)
25 years236.8 mm (9.3 in)
50 years302.0 mm (11.9 in)Longer than the 44 years of record
100 years382.7 mm (15.1 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 1961 to 2011.

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: 356.9 mm (14.1 in) in 1999; 339.9 mm (13.4 in) in 2011; 207.3 mm (8.2 in) in 1981.

Download the Data

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