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Acatitan Weather Records (MXN00025001)

Record envelope, standing records and threshold days for Acatitan (MXN00025001), Mexico, with 52 years of record.

Key Facts for Acatitan

  • Acatitan (MXN00025001) is a weather station in Mexico at 24.08 latitude and -106.67 longitude, 96 m (314 ft) above sea level.
  • The station reports from 1961 to 2012, 52 years of record.
  • 1,464 records set at Acatitan still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Acatitan set a daily record low maximum temperature of 28.3 C (82.9 F) on 17 October 2012.

About the Station

  • Location: Mexico, 24.08 latitude, -106.67 longitude.
  • Elevation: 96 m (314 ft).
  • Period of record: 1961 to 2012, 52 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 Acatitan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Acatitan. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -1001020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Acatitan. 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 Acatitan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan38.9 C (102.0 F)0.0 C (32.0 F)n/an/a
Feb40.0 C (104.0 F)-2.8 C (27.0 F)n/an/a
Mar41.1 C (106.0 F)2.8 C (37.0 F)n/an/a
Apr45.0 C (113.0 F)5.0 C (41.0 F)n/an/a
May42.8 C (109.0 F)6.7 C (44.1 F)n/an/a
Jun45.0 C (113.0 F)13.3 C (55.9 F)n/an/a
Jul44.4 C (111.9 F)16.7 C (62.1 F)n/an/a
Aug41.1 C (106.0 F)18.9 C (66.0 F)n/an/a
Sep42.8 C (109.0 F)17.8 C (64.0 F)n/an/a
Oct41.1 C (106.0 F)8.9 C (48.0 F)n/an/a
Nov40.6 C (105.1 F)2.8 C (37.0 F)n/an/a
Dec39.4 C (102.9 F)2.8 C (37.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Acatitan by the year they were set 1,464 records at Acatitan still stand. 1979 holds the most, with 63. 0204060801961: 351962: 421963: 311964: 431965: 521966: 431967: 411968: 411969: 311970: 291971: 461972: 451973: 411974: 351975: 271976: 291977: 181978: 391979: 631980: 401981: 351982: 281983: 201984: 141985: 201986: 181987: 551988: 221989: 151990: 241991: 301992: 471993: 71994: 41996: 241997: 291998: 191999: 212000: 172001: 202002: 142003: 192004: 212005: 142006: 82007: 182008: 192009: 222010: 272011: 532012: 9196119671973197919851991199820042010
1,464 records at Acatitan still stand. 1979 holds the most, with 63.
Standing records at Acatitan by the year they were set
Year setStanding records
196135
196242
196331
196443
196552
196643
196741
196841
196931
197029
197146
197245
197341
197435
197527
197629
197718
197839
197963
198040
198135
198228
198320
198414
198520
198618
198755
198822
198915
199024
199130
199247
19937
19944
199624
199729
199819
199921
200017
200120
200214
200319
200421
200514
20068
200718
200819
200922
201027
201153
20129

All-Time Record Progression

3 new records
When Acatitan set new all-time records 3 all-time records were set at Acatitan between 20 April 1991 and 5 February 2011. Each dot is a new record. Record high maximum temperatureRecord high minimum temperatureRecord low minimum temperature20 April 1991: Record high maximum temperature 45.0 C (113.0 F)29 June 1992: Record high minimum temperature 28.9 C (84.0 F)5 February 2011: Record low minimum temperature -2.8 C (27.0 F)1995200020052010
3 all-time records were set at Acatitan between 20 April 1991 and 5 February 2011. Each dot is a new record.
When Acatitan set new all-time records
DateKindDetail
1991-04-20Record high maximum temperatureRecord high maximum temperature 45.0 C (113.0 F)
1992-06-29Record high minimum temperatureRecord high minimum temperature 28.9 C (84.0 F)
2011-02-05Record low minimum temperatureRecord low minimum temperature -2.8 C (27.0 F)

Wettest Day of Each Month

Sep: 217.2 mm (8.6 in)
Record daily precipitation for each month at Acatitan The wettest day on record for each calendar month at Acatitan. The most was 217.2 mm (8.6 in) on 23 September 1974. 0100200300 Jan: 70.6 mm (2.8 in), 24 January 1979 Jan Feb: 57.9 mm (2.3 in), 20 February 1973 Feb Mar: 46.2 mm (1.8 in), 3 March 1983 Mar Apr: 30.0 mm (1.2 in), 3 April 1997 Apr May: 7.6 mm (0.30 in), 27 May 1974 May Jun: 65.3 mm (2.6 in), 21 June 1999 Jun Jul: 127.5 mm (5.0 in), 4 July 1990 Jul Aug: 94.5 mm (3.7 in), 20 August 1980 Aug Sep: 217.2 mm (8.6 in), 23 September 1974 Sep Oct: 216.9 mm (8.5 in), 29 October 1972 Oct Nov: 137.9 mm (5.4 in), 23 November 1972 Nov Dec: 74.4 mm (2.9 in), 10 December 1961 Dec
The wettest day on record for each calendar month at Acatitan. The most was 217.2 mm (8.6 in) on 23 September 1974.
Record daily precipitation for each month at Acatitan
MonthRecord daily precipitation (mm)Date
Jan70.6 mm (2.8 in)24 January 1979
Feb57.9 mm (2.3 in)20 February 1973
Mar46.2 mm (1.8 in)3 March 1983
Apr30.0 mm (1.2 in)3 April 1997
May7.6 mm (0.30 in)27 May 1974
Jun65.3 mm (2.6 in)21 June 1999
Jul127.5 mm (5.0 in)4 July 1990
Aug94.5 mm (3.7 in)20 August 1980
Sep217.2 mm (8.6 in)23 September 1974
Oct216.9 mm (8.5 in)29 October 1972
Nov137.9 mm (5.4 in)23 November 1972
Dec74.4 mm (2.9 in)10 December 1961

Period of Record Coverage

1961 to 2012
Days with data per year at Acatitan 51 years of record at Acatitan, 1961 to 2012. 5 years have data for under 90 percent of days and are left out of rankings: 1989, 1990, 1993, 1994, 1996. 1961: 364 of 365 days1962: 365 of 365 days1963: 364 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 362 of 365 days1970: 363 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 364 of 365 days1976: 335 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 364 of 365 days1984: 365 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 365 of 366 days1989: 304 of 365 days1990: 273 of 365 days1991: 364 of 365 days1992: 344 of 366 days1993: 90 of 365 days1994: 90 of 365 days1996: 304 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 357 of 365 days2000: 366 of 366 days2001: 364 of 365 days2002: 364 of 365 days2003: 364 of 365 days2004: 366 of 366 days2005: 364 of 365 days2006: 365 of 365 days2007: 334 of 365 days2008: 335 of 366 days2009: 364 of 365 days2010: 334 of 365 days2011: 334 of 365 days2012: 342 of 366 days19701980199020002010
51 years of record at Acatitan, 1961 to 2012. 5 years have data for under 90 percent of days and are left out of rankings: 1989, 1990, 1993, 1994, 1996.
Days with data per year at Acatitan
YearDays with dataShare of yearComplete
1961364100%Yes
1962365100%Yes
1963364100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
196936299%Yes
197036399%Yes
1971365100%Yes
1972365100%Yes
1973365100%Yes
1974365100%Yes
1975364100%Yes
197633592%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983364100%Yes
1984365100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988365100%Yes
198930483%No
199027375%No
1991364100%Yes
199234494%Yes
19939025%No
19949025%No
199630483%No
1997365100%Yes
1998365100%Yes
199935798%Yes
2000366100%Yes
2001364100%Yes
2002364100%Yes
2003364100%Yes
2004366100%Yes
2005364100%Yes
2006365100%Yes
200733492%Yes
200833592%Yes
2009364100%Yes
201033492%Yes
201133492%Yes
201234293%Yes

Latest Records

20
Latest records at Acatitan
DateStationRecordValueBeat old record byOld record stoodSignificance
17 October 2012Acatitan, MXdaily low max28.3 C (82.9 F)3.9 C (7.0 F)41 years33 of 100 (Routine)
17 October 2012Acatitan, MXdaily rain4.8 mm (0.19 in)0.7 mm (0.03 in)49 years19 of 100 (Routine)
12 October 2012Acatitan, MXdaily low min11.7 C (53.1 F)2.7 C (4.9 F)39 years24 of 100 (Routine)
29 September 2012Acatitan, MXdaily low max (Tie)31.7 C (89.1 F)tie49 years4 of 100 (Routine)
28 September 2012Acatitan, MXdaily low max25.6 C (78.1 F)5.0 C (9.0 F)32 years38 of 100 (Notable)
21 September 2012Acatitan, MXdaily low min21.1 C (70.0 F)0.6 C (1.1 F)42 years21 of 100 (Routine)
24 August 2012Acatitan, MXdaily rain63.0 mm (2.5 in)29.2 mm (1.1 in)27 years31 of 100 (Routine)
23 August 2012Acatitan, MXdaily rain57.9 mm (2.3 in)9.1 mm (0.36 in)40 years22 of 100 (Routine)
21 August 2012Acatitan, MXdaily low max (Tie)31.7 C (89.1 F)tie24 years3 of 100 (Routine)
19 August 2012Acatitan, MXdaily low max30.0 C (86.0 F)1.7 C (3.1 F)26 years21 of 100 (Routine)
10 August 2012Acatitan, MXdaily high max (Tie)37.8 C (100.0 F)tie33 years3 of 100 (Routine)
17 July 2012Acatitan, MXdaily low min (Tie)21.7 C (71.1 F)tie47 years4 of 100 (Routine)
16 July 2012Acatitan, MXdaily rain67.3 mm (2.6 in)22.3 mm (0.9 in)11 years21 of 100 (Routine)
16 July 2012Acatitan, MXdaily low min21.7 C (71.1 F)0.5 C (0.9 F)6 years9 of 100 (Routine)
22 June 2012Acatitan, MXdaily low max (Tie)32.8 C (91.0 F)tie13 years2 of 100 (Routine)
21 June 2012Acatitan, MXdaily low max31.7 C (89.1 F)2.2 C (4.0 F)12 years17 of 100 (Routine)
13 June 2012Acatitan, MXdaily high max (Tie)40.6 C (105.1 F)tie25 years3 of 100 (Routine)
3 June 2012Acatitan, MXdaily low max (Tie)33.3 C (91.9 F)tie48 years4 of 100 (Routine)
24 March 2012Acatitan, MXdaily low min (Tie)6.7 C (44.1 F)tie50 years5 of 100 (Routine)
12 March 2012Acatitan, MXdaily low min (Tie)5.0 C (41.0 F)tie49 years4 of 100 (Routine)

Climate Trend

37 complete years, 1961 to 2009
Annual mean temperature at Acatitan as warming stripes, 1961 to 2009 One stripe for each of 37 complete years at Acatitan, 1961 to 2009. Blue stripes are years cooler than the station's own mean of 25.4 C (77.8 F); red stripes are warmer. The coolest year was 1964, at 24.8 C (76.7 F), and the warmest was 1982, at 26.1 C (78.9 F). The strongest colour marks a difference of 0.7 C (1.3 F). 1961: 25.4 C, -0.1 C from the station mean1962: 25.4 C, 0.0 C from the station mean1963: 25.6 C, +0.2 C from the station mean1964: 24.8 C, -0.6 C from the station mean1965: 25.3 C, -0.1 C from the station mean1966: 25.7 C, +0.2 C from the station mean1967: 25.7 C, +0.2 C from the station mean1970: 25.5 C, +0.1 C from the station mean1971: 25.2 C, -0.2 C from the station mean1972: 25.8 C, +0.4 C from the station mean1973: 25.0 C, -0.4 C from the station mean1974: 25.1 C, -0.4 C from the station mean1975: 25.0 C, -0.5 C from the station mean1977: 25.5 C, 0.0 C from the station mean1978: 25.6 C, +0.2 C from the station mean1979: 25.5 C, +0.1 C from the station mean1980: 25.8 C, +0.3 C from the station mean1981: 25.6 C, +0.2 C from the station mean1982: 26.1 C, +0.6 C from the station mean1983: 25.3 C, -0.1 C from the station mean1984: 25.2 C, -0.3 C from the station mean1985: 25.3 C, -0.1 C from the station mean1986: 25.6 C, +0.2 C from the station mean1987: 25.6 C, +0.1 C from the station mean1988: 26.0 C, +0.5 C from the station mean1991: 25.7 C, +0.2 C from the station mean1997: 25.3 C, -0.1 C from the station mean1998: 25.4 C, 0.0 C from the station mean1999: 25.1 C, -0.3 C from the station mean2000: 25.1 C, -0.3 C from the station mean2001: 25.2 C, -0.2 C from the station mean2002: 25.5 C, 0.0 C from the station mean2003: 25.7 C, +0.3 C from the station mean2004: 24.9 C, -0.5 C from the station mean2005: 25.6 C, +0.1 C from the station mean2006: 25.3 C, -0.2 C from the station mean2009: 25.9 C, +0.5 C from the station mean1961196519701975198019851990199520002005
One stripe for each of 37 complete years at Acatitan, 1961 to 2009. Blue stripes are years cooler than the station's own mean of 25.4 C (77.8 F); red stripes are warmer. The coolest year was 1964, at 24.8 C (76.7 F), and the warmest was 1982, at 26.1 C (78.9 F). The strongest colour marks a difference of 0.7 C (1.3 F).
Annual mean temperature at Acatitan as warming stripes, 1961 to 2009
YearAnnual mean temperatureDifference from the station mean
196125.4 C-0.08 C
196225.4 C-0.01 C
196325.6 C+0.20 C
196424.8 C-0.61 C
196525.3 C-0.12 C
196625.7 C+0.23 C
196725.7 C+0.21 C
197025.5 C+0.10 C
197125.2 C-0.22 C
197225.8 C+0.38 C
197325.0 C-0.43 C
197425.1 C-0.39 C
197525.0 C-0.47 C
197725.5 C+0.04 C
197825.6 C+0.15 C
197925.5 C+0.06 C
198025.8 C+0.33 C
198125.6 C+0.20 C
198226.1 C+0.62 C
198325.3 C-0.13 C
198425.2 C-0.27 C
198525.3 C-0.10 C
198625.6 C+0.18 C
198725.6 C+0.13 C
198826.0 C+0.52 C
199125.7 C+0.22 C
199725.3 C-0.10 C
199825.4 C-0.04 C
199925.1 C-0.32 C
200025.1 C-0.32 C
200125.2 C-0.22 C
200225.5 C+0.01 C
200325.7 C+0.28 C
200424.9 C-0.55 C
200525.6 C+0.12 C
200625.3 C-0.17 C
200925.9 C+0.47 C

The fitted trend in annual mean temperature here over 1961 to 2009 is 0.01 C (-0.07 to 0.08) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.01 F (-0.12 to 0.14) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Acatitan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.01 C (-0.07 to 0.08) per decade0.01 F (-0.12 to 0.14) per decade1961 to 200937Not clearly different from zero
Mean daily maximum0.00 C (-0.10 to 0.11) per decade0.01 F (-0.18 to 0.19) per decade1961 to 200937Not clearly different from zero
Mean daily minimum0.01 C (-0.10 to 0.12) per decade0.01 F (-0.19 to 0.21) per decade1961 to 200937Not 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

1961 to 2012
Yearly extremes at Acatitan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.0 C (113.0 F)199141.1 C (106.0 F)51
Coldest night (TNn)-2.8 C (27.0 F)20114.4 C (39.9 F)51
Wettest day (Rx1day)217.2 mm (8.6 in)197469.9 mm (2.8 in)52
Wettest five days (Rx5day)284.5 mm (11.2 in)1972117.8 mm (4.6 in)52
Longest dry spell (CDD)181 days1975113 days52

Hottest day (TXx)

Hottest day (TXx) at Acatitan by year The hottest day of the year at Acatitan, 1961 to 2012. The record is 45.0 C (113.0 F) in 1991, marked on the chart; the median year is 41.1 C (106.0 F). 36384042444619701980199020002010Record: 45.0 C (113.0 F) in 1991
The hottest day of the year at Acatitan, 1961 to 2012. The record is 45.0 C (113.0 F) in 1991, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Acatitan by year
YearHottest day (TXx)
196142.2 C (108.0 F)
196241.7 C (107.1 F)
196341.1 C (106.0 F)
196442.8 C (109.0 F)
196542.2 C (108.0 F)
196642.2 C (108.0 F)
196741.7 C (107.1 F)
196841.7 C (107.1 F)
196944.4 C (111.9 F)
197042.2 C (108.0 F)
197141.1 C (106.0 F)
197241.7 C (107.1 F)
197340.6 C (105.1 F)
197441.7 C (107.1 F)
197540.6 C (105.1 F)
197641.1 C (106.0 F)
197740.0 C (104.0 F)
197842.2 C (108.0 F)
197942.2 C (108.0 F)
198042.8 C (109.0 F)
198141.7 C (107.1 F)
198242.8 C (109.0 F)
198342.2 C (108.0 F)
198441.1 C (106.0 F)
198540.0 C (104.0 F)
198641.1 C (106.0 F)
198742.2 C (108.0 F)
198842.8 C (109.0 F)
198941.1 C (106.0 F)
199042.8 C (109.0 F)
199145.0 C (113.0 F)
199245.0 C (113.0 F)
199337.8 C (100.0 F)
199438.3 C (100.9 F)
1995n/a
199640.0 C (104.0 F)
199740.6 C (105.1 F)
199841.7 C (107.1 F)
199940.0 C (104.0 F)
200038.9 C (102.0 F)
200140.0 C (104.0 F)
200240.0 C (104.0 F)
200340.6 C (105.1 F)
200440.6 C (105.1 F)
200540.0 C (104.0 F)
200641.7 C (107.1 F)
200740.0 C (104.0 F)
200840.0 C (104.0 F)
200940.6 C (105.1 F)
201040.6 C (105.1 F)
201138.9 C (102.0 F)
201240.6 C (105.1 F)

Coldest night (TNn)

Coldest night (TNn) at Acatitan by year The coldest night of the year at Acatitan, 1961 to 2012. The record is -2.8 C (27.0 F) in 2011, marked on the chart; the median year is 4.4 C (39.9 F). -5-2.502.557.519701980199020002010Record: -2.8 C (27.0 F) in 2011
The coldest night of the year at Acatitan, 1961 to 2012. The record is -2.8 C (27.0 F) in 2011, marked on the chart; the median year is 4.4 C (39.9 F).
Coldest night (TNn) at Acatitan by year
YearColdest night (TNn)
19615.6 C (42.1 F)
19624.4 C (39.9 F)
19634.4 C (39.9 F)
19641.1 C (34.0 F)
19652.8 C (37.0 F)
19665.0 C (41.0 F)
19672.8 C (37.0 F)
19685.0 C (41.0 F)
19695.0 C (41.0 F)
19704.4 C (39.9 F)
19711.1 C (34.0 F)
19725.0 C (41.0 F)
19732.8 C (37.0 F)
19742.2 C (36.0 F)
19752.8 C (37.0 F)
19763.3 C (37.9 F)
19774.4 C (39.9 F)
19785.0 C (41.0 F)
19792.8 C (37.0 F)
19805.6 C (42.1 F)
19816.1 C (43.0 F)
19825.0 C (41.0 F)
19835.6 C (42.1 F)
19844.4 C (39.9 F)
19853.9 C (39.0 F)
19865.0 C (41.0 F)
19873.9 C (39.0 F)
19880.0 C (32.0 F)
19893.9 C (39.0 F)
19905.6 C (42.1 F)
19914.4 C (39.9 F)
19926.1 C (43.0 F)
19937.2 C (45.0 F)
19945.0 C (41.0 F)
1995n/a
19966.1 C (43.0 F)
19970.0 C (32.0 F)
19983.9 C (39.0 F)
19993.9 C (39.0 F)
20002.8 C (37.0 F)
20012.8 C (37.0 F)
20022.8 C (37.0 F)
20032.8 C (37.0 F)
20042.8 C (37.0 F)
20055.0 C (41.0 F)
20060.6 C (33.1 F)
20075.0 C (41.0 F)
20080.0 C (32.0 F)
20095.6 C (42.1 F)
20105.0 C (41.0 F)
2011-2.8 C (27.0 F)
20124.4 C (39.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Acatitan by year The wettest day of the year at Acatitan, 1961 to 2012. The record is 217.2 mm (8.6 in) in 1974, marked on the chart; the median year is 69.9 mm (2.8 in). 010020030019701980199020002010Record: 217.2 mm (8.6 in) in 1974
The wettest day of the year at Acatitan, 1961 to 2012. The record is 217.2 mm (8.6 in) in 1974, marked on the chart; the median year is 69.9 mm (2.8 in).
Wettest day (Rx1day) at Acatitan by year
YearWettest day (Rx1day)
196174.4 mm (2.9 in)
196264.0 mm (2.5 in)
196356.1 mm (2.2 in)
1964103.6 mm (4.1 in)
196581.3 mm (3.2 in)
196663.8 mm (2.5 in)
196754.9 mm (2.2 in)
1968195.3 mm (7.7 in)
196957.2 mm (2.3 in)
197076.7 mm (3.0 in)
197162.7 mm (2.5 in)
1972216.9 mm (8.5 in)
1973116.3 mm (4.6 in)
1974217.2 mm (8.6 in)
197549.3 mm (1.9 in)
1976135.9 mm (5.4 in)
197764.3 mm (2.5 in)
197864.3 mm (2.5 in)
197970.6 mm (2.8 in)
1980111.8 mm (4.4 in)
1981107.7 mm (4.2 in)
198268.8 mm (2.7 in)
198382.3 mm (3.2 in)
1984114.3 mm (4.5 in)
1985205.2 mm (8.1 in)
198682.8 mm (3.3 in)
198733.8 mm (1.3 in)
198887.4 mm (3.4 in)
198962.0 mm (2.4 in)
1990127.5 mm (5.0 in)
199197.8 mm (3.9 in)
199258.4 mm (2.3 in)
19939.4 mm (0.37 in)
19943.3 mm (0.13 in)
19950.0 mm (0.00 in)
199655.4 mm (2.2 in)
199769.1 mm (2.7 in)
199888.9 mm (3.5 in)
199990.4 mm (3.6 in)
2000179.8 mm (7.1 in)
200168.1 mm (2.7 in)
200277.0 mm (3.0 in)
200358.9 mm (2.3 in)
200464.3 mm (2.5 in)
200557.9 mm (2.3 in)
2006134.4 mm (5.3 in)
200777.0 mm (3.0 in)
200868.8 mm (2.7 in)
200980.8 mm (3.2 in)
201040.9 mm (1.6 in)
201163.0 mm (2.5 in)
201267.3 mm (2.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Acatitan by year The wettest five days of the year at Acatitan, 1961 to 2012. The record is 284.5 mm (11.2 in) in 1972, marked on the chart; the median year is 117.8 mm (4.6 in). 010020030019701980199020002010Record: 284.5 mm (11.2 in) in 1972
The wettest five days of the year at Acatitan, 1961 to 2012. The record is 284.5 mm (11.2 in) in 1972, marked on the chart; the median year is 117.8 mm (4.6 in).
Wettest five days (Rx5day) at Acatitan by year
YearWettest five days (Rx5day)
1961106.1 mm (4.2 in)
1962103.4 mm (4.1 in)
1963128.8 mm (5.1 in)
1964115.3 mm (4.5 in)
1965135.7 mm (5.3 in)
1966118.4 mm (4.7 in)
1967104.5 mm (4.1 in)
1968218.9 mm (8.6 in)
1969112.4 mm (4.4 in)
1970129.8 mm (5.1 in)
1971110.0 mm (4.3 in)
1972284.5 mm (11.2 in)
1973144.6 mm (5.7 in)
1974235.3 mm (9.3 in)
197598.8 mm (3.9 in)
1976166.7 mm (6.6 in)
197798.6 mm (3.9 in)
197885.3 mm (3.4 in)
197973.7 mm (2.9 in)
1980186.7 mm (7.4 in)
1981141.0 mm (5.6 in)
1982107.7 mm (4.2 in)
1983214.2 mm (8.4 in)
1984153.7 mm (6.1 in)
1985276.8 mm (10.9 in)
1986208.0 mm (8.2 in)
198749.5 mm (1.9 in)
1988157.7 mm (6.2 in)
198976.0 mm (3.0 in)
1990168.2 mm (6.6 in)
1991117.1 mm (4.6 in)
199296.6 mm (3.8 in)
19939.4 mm (0.37 in)
19943.3 mm (0.13 in)
19950.0 mm (0.00 in)
1996123.4 mm (4.9 in)
1997133.9 mm (5.3 in)
1998116.4 mm (4.6 in)
1999108.7 mm (4.3 in)
2000189.2 mm (7.4 in)
200188.7 mm (3.5 in)
200282.0 mm (3.2 in)
2003141.1 mm (5.6 in)
2004122.0 mm (4.8 in)
2005111.0 mm (4.4 in)
2006154.2 mm (6.1 in)
2007136.9 mm (5.4 in)
2008148.4 mm (5.8 in)
2009114.1 mm (4.5 in)
201074.0 mm (2.9 in)
201181.7 mm (3.2 in)
2012168.7 mm (6.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Acatitan by year The longest dry spell of the year at Acatitan, 1961 to 2012. The record is 181 days in 1975, marked on the chart; the median year is 113 days. 05010015020019701980199020002010Record: 181 days in 1975
The longest dry spell of the year at Acatitan, 1961 to 2012. The record is 181 days in 1975, marked on the chart; the median year is 113 days.
Longest dry spell (CDD) at Acatitan by year
YearLongest dry spell (CDD)
196172 days
1962101 days
1963113 days
196496 days
1965145 days
196665 days
1967144 days
1968135 days
1969126 days
1970123 days
1971115 days
1972180 days
1973105 days
1974146 days
1975181 days
1976164 days
197782 days
197874 days
1979147 days
1980132 days
198162 days
1982169 days
198349 days
1984104 days
1985116 days
198684 days
198779 days
1988170 days
1989143 days
199074 days
1991180 days
1992113 days
199353 days
199455 days
199531 days
1996155 days
199748 days
1998104 days
1999106 days
2000149 days
2001108 days
2002142 days
2003125 days
200493 days
2005125 days
200678 days
2007153 days
2008155 days
2009162 days
201096 days
201168 days
201260 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, 1961 to 2012

A day with at least 75.6 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 296.6 mm (11.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Acatitan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years75.6 mm (3.0 in)
5 years109.0 mm (4.3 in)
10 years138.8 mm (5.5 in)
25 years188.5 mm (7.4 in)
50 years236.7 mm (9.3 in)Longer than the 47 years of record
100 years296.6 mm (11.7 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 1961 to 2012.

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: 217.2 mm (8.6 in) in 1974; 216.9 mm (8.5 in) in 1972; 205.2 mm (8.1 in) in 1985.

Download the Data

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