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Acatlan de Osorio (Smn) Weather Records (MXN00021003)

Record envelope, standing records and threshold days for Acatlan de Osorio (Smn) (MXN00021003), Mexico, with 67 years of record.

Key Facts for Acatlan de Osorio (Smn)

  • Acatlan de Osorio (Smn) (MXN00021003) is a weather station in Mexico at 18.30 latitude and -98.05 longitude, 1,180 m (3,871 ft) above sea level.
  • The station reports from 1943 to 2009, 67 years of record.
  • 1,464 records set at Acatlan de Osorio (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Acatlan de Osorio (Smn) tied a daily record high minimum temperature of 18.9 C (66.0 F) on 31 December 2009.

About the Station

  • Location: Mexico, 18.30 latitude, -98.05 longitude.
  • Elevation: 1,180 m (3,871 ft).
  • Period of record: 1943 to 2009, 67 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 Acatlan de Osorio (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Acatlan de Osorio (Smn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Acatlan de Osorio (Smn). 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 Acatlan de Osorio (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan40.6 C (105.1 F)0.6 C (33.1 F)n/an/a
Feb43.9 C (111.0 F)-6.1 C (21.0 F)n/an/a
Mar45.0 C (113.0 F)3.9 C (39.0 F)n/an/a
Apr45.0 C (113.0 F)5.6 C (42.1 F)n/an/a
May46.1 C (115.0 F)7.8 C (46.0 F)n/an/a
Jun45.6 C (114.1 F)8.9 C (48.0 F)n/an/a
Jul41.7 C (107.1 F)6.7 C (44.1 F)n/an/a
Aug41.7 C (107.1 F)5.0 C (41.0 F)n/an/a
Sep40.6 C (105.1 F)6.7 C (44.1 F)n/an/a
Oct45.6 C (114.1 F)5.0 C (41.0 F)n/an/a
Nov40.6 C (105.1 F)0.6 C (33.1 F)n/an/a
Dec40.0 C (104.0 F)0.0 C (32.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Acatlan de Osorio (Smn) by the year they were set 1,464 records at Acatlan de Osorio (Smn) still stand. 2009 holds the most, with 247. 01002003001945: 41946: 101947: 111948: 381949: 61950: 61951: 141952: 131953: 161954: 101955: 261956: 81957: 191958: 251959: 301960: 901961: 1671962: 491963: 201964: 51965: 141966: 61967: 121968: 61969: 131970: 41971: 61972: 441973: 351974: 81975: 31976: 111977: 461978: 141979: 221980: 251981: 111982: 241983: 391984: 1071985: 411986: 201987: 32007: 932008: 432009: 2471945195019551960196519701975198019852009
1,464 records at Acatlan de Osorio (Smn) still stand. 2009 holds the most, with 247.
Standing records at Acatlan de Osorio (Smn) by the year they were set
Year setStanding records
19454
194610
194711
194838
19496
19506
195114
195213
195316
195410
195526
19568
195719
195825
195930
196090
1961167
196249
196320
19645
196514
19666
196712
19686
196913
19704
19716
197244
197335
19748
19753
197611
197746
197814
197922
198025
198111
198224
198339
1984107
198541
198620
19873
200793
200843
2009247

All-Time Record Progression

2 new records
When Acatlan de Osorio (Smn) set new all-time records 2 all-time records were set at Acatlan de Osorio (Smn) between 11 January 1984 and 11 May 2009. Each dot is a new record. Record low maximum temperatureRecord high minimum temperature11 January 1984: Record low maximum temperature 13.9 C (57.0 F)11 May 2009: Record high minimum temperature 27.8 C (82.0 F)198519901995200020052010
2 all-time records were set at Acatlan de Osorio (Smn) between 11 January 1984 and 11 May 2009. Each dot is a new record.
When Acatlan de Osorio (Smn) set new all-time records
DateKindDetail
1984-01-11Record low maximum temperatureRecord low maximum temperature 13.9 C (57.0 F)
2009-05-11Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)

Wettest Day of Each Month

Jul: 143.3 mm (5.6 in)
Record daily precipitation for each month at Acatlan de Osorio (Smn) The wettest day on record for each calendar month at Acatlan de Osorio (Smn). The most was 143.3 mm (5.6 in) on 9 July 1945. 050100150 Jan: 39.9 mm (1.6 in), 23 January 1974 Jan Feb: 30.0 mm (1.2 in), 4 February 1968 Feb Mar: 19.8 mm (0.8 in), 3 March 2007 Mar Apr: 49.8 mm (2.0 in), 12 April 1985 Apr May: 79.8 mm (3.1 in), 4 May 1963 May Jun: 99.8 mm (3.9 in), 17 June 1984 Jun Jul: 143.3 mm (5.6 in), 9 July 1945 Jul Aug: 95.0 mm (3.7 in), 29 August 2009 Aug Sep: 95.8 mm (3.8 in), 2 September 1962 Sep Oct: 47.8 mm (1.9 in), 17 October 1983 Oct Nov: 58.9 mm (2.3 in), 2 November 1958 Nov Dec: 45.0 mm (1.8 in), 29 December 1984 Dec
The wettest day on record for each calendar month at Acatlan de Osorio (Smn). The most was 143.3 mm (5.6 in) on 9 July 1945.
Record daily precipitation for each month at Acatlan de Osorio (Smn)
MonthRecord daily precipitation (mm)Date
Jan39.9 mm (1.6 in)23 January 1974
Feb30.0 mm (1.2 in)4 February 1968
Mar19.8 mm (0.8 in)3 March 2007
Apr49.8 mm (2.0 in)12 April 1985
May79.8 mm (3.1 in)4 May 1963
Jun99.8 mm (3.9 in)17 June 1984
Jul143.3 mm (5.6 in)9 July 1945
Aug95.0 mm (3.7 in)29 August 2009
Sep95.8 mm (3.8 in)2 September 1962
Oct47.8 mm (1.9 in)17 October 1983
Nov58.9 mm (2.3 in)2 November 1958
Dec45.0 mm (1.8 in)29 December 1984

Period of Record Coverage

1944 to 2009
Days with data per year at Acatlan de Osorio (Smn) 47 years of record at Acatlan de Osorio (Smn), 1944 to 2009. 5 years have data for under 90 percent of days and are left out of rankings: 1944, 1977, 1981, 1985, 1987. 1944: 13 of 366 days1945: 364 of 365 days1946: 365 of 365 days1947: 364 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 364 of 365 days1952: 365 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 363 of 365 days1962: 365 of 365 days1963: 364 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 363 of 365 days1967: 364 of 365 days1968: 366 of 366 days1969: 362 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 364 of 365 days1974: 365 of 365 days1975: 364 of 365 days1976: 332 of 366 days1977: 322 of 365 days1978: 364 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 302 of 365 days1982: 365 of 365 days1983: 364 of 365 days1984: 365 of 366 days1985: 300 of 365 days1986: 361 of 365 days1987: 59 of 365 days2007: 359 of 365 days2008: 359 of 366 days2009: 360 of 365 days1950196019701980
47 years of record at Acatlan de Osorio (Smn), 1944 to 2009. 5 years have data for under 90 percent of days and are left out of rankings: 1944, 1977, 1981, 1985, 1987.
Days with data per year at Acatlan de Osorio (Smn)
YearDays with dataShare of yearComplete
1944134%No
1945364100%Yes
1946365100%Yes
1947364100%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
1951364100%Yes
1952365100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958364100%Yes
1959365100%Yes
1960366100%Yes
196136399%Yes
1962365100%Yes
1963364100%Yes
1964365100%Yes
1965365100%Yes
196636399%Yes
1967364100%Yes
1968366100%Yes
196936299%Yes
1970365100%Yes
1971365100%Yes
1972365100%Yes
1973364100%Yes
1974365100%Yes
1975364100%Yes
197633291%Yes
197732288%No
1978364100%Yes
1979365100%Yes
1980366100%Yes
198130283%No
1982365100%Yes
1983364100%Yes
1984365100%Yes
198530082%No
198636199%Yes
19875916%No
200735998%Yes
200835998%Yes
200936099%Yes

Latest Records

20
Latest records at Acatlan de Osorio (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
31 December 2009Acatlan de Osorio (Smn), MXdaily high min (Tie)18.9 C (66.0 F)tie2 years1 of 100 (Routine)
30 December 2009Acatlan de Osorio (Smn), MXdaily high min20.0 C (68.0 F)1.1 C (2.0 F)2 years8 of 100 (Routine)
29 December 2009Acatlan de Osorio (Smn), MXdaily high min20.0 C (68.0 F)1.1 C (2.0 F)0 years8 of 100 (Routine)
29 December 2009Acatlan de Osorio (Smn), MXdaily high max (Tie)36.7 C (98.1 F)tie47 years5 of 100 (Routine)
28 December 2009Acatlan de Osorio (Smn), MXdaily high min18.9 C (66.0 F)1.1 C (2.0 F)2 years8 of 100 (Routine)
26 December 2009Acatlan de Osorio (Smn), MXdaily high min20.6 C (69.1 F)2.8 C (5.0 F)0 years13 of 100 (Routine)
20 December 2009Acatlan de Osorio (Smn), MXdaily high min20.0 C (68.0 F)1.7 C (3.1 F)64 years29 of 100 (Routine)
19 December 2009Acatlan de Osorio (Smn), MXdaily high min18.9 C (66.0 F)1.1 C (2.0 F)64 years27 of 100 (Routine)
18 December 2009Acatlan de Osorio (Smn), MXdaily high min (Tie)17.8 C (64.0 F)tie0 years1 of 100 (Routine)
17 December 2009Acatlan de Osorio (Smn), MXdaily high min20.6 C (69.1 F)2.8 C (5.0 F)0 years13 of 100 (Routine)
16 December 2009Acatlan de Osorio (Smn), MXdaily high min20.6 C (69.1 F)2.8 C (5.0 F)64 years32 of 100 (Routine)
15 December 2009Acatlan de Osorio (Smn), MXdaily high min17.8 C (64.0 F)0.6 C (1.1 F)60 years25 of 100 (Routine)
13 December 2009Acatlan de Osorio (Smn), MXdaily high min (Tie)17.8 C (64.0 F)tie62 years6 of 100 (Routine)
12 December 2009Acatlan de Osorio (Smn), MXdaily high min20.6 C (69.1 F)2.8 C (5.0 F)23 years19 of 100 (Routine)
12 December 2009Acatlan de Osorio (Smn), MXdaily high max (Tie)35.6 C (96.1 F)tie48 years5 of 100 (Routine)
11 December 2009Acatlan de Osorio (Smn), MXdaily high min17.8 C (64.0 F)1.1 C (2.0 F)60 years26 of 100 (Routine)
10 December 2009Acatlan de Osorio (Smn), MXdaily high min17.8 C (64.0 F)1.1 C (2.0 F)47 years22 of 100 (Routine)
10 December 2009Acatlan de Osorio (Smn), MXdaily high max (Tie)36.7 C (98.1 F)tie50 years5 of 100 (Routine)
9 December 2009Acatlan de Osorio (Smn), MXdaily high max (Tie)35.6 C (96.1 F)tie58 years5 of 100 (Routine)
7 December 2009Acatlan de Osorio (Smn), MXdaily high min18.9 C (66.0 F)2.2 C (4.0 F)40 years23 of 100 (Routine)

Climate Trend

41 complete years, 1945 to 2009
Annual mean temperature at Acatlan de Osorio (Smn) as warming stripes, 1945 to 2009 One stripe for each of 41 complete years at Acatlan de Osorio (Smn), 1945 to 2009. Blue stripes are years cooler than the station's own mean of 24.6 C (76.2 F); red stripes are warmer. The coolest year was 1984, at 20.9 C (69.6 F), and the warmest was 2009, at 29.2 C (84.6 F). The strongest colour marks a difference of 4.7 C (8.5 F). 1945: 25.4 C, +0.8 C from the station mean1946: 25.2 C, +0.6 C from the station mean1947: 24.9 C, +0.4 C from the station mean1948: 25.4 C, +0.9 C from the station mean1949: 24.4 C, -0.2 C from the station mean1950: 24.2 C, -0.3 C from the station mean1951: 24.9 C, +0.3 C from the station mean1952: 24.8 C, +0.2 C from the station mean1953: 25.0 C, +0.4 C from the station mean1954: 24.1 C, -0.5 C from the station mean1955: 23.7 C, -0.8 C from the station mean1956: 23.9 C, -0.7 C from the station mean1957: 24.6 C, 0.0 C from the station mean1958: 24.3 C, -0.3 C from the station mean1959: 24.7 C, +0.1 C from the station mean1960: 23.2 C, -1.4 C from the station mean1961: 21.7 C, -2.8 C from the station mean1962: 26.3 C, +1.7 C from the station mean1963: 25.6 C, +1.1 C from the station mean1964: 25.4 C, +0.8 C from the station mean1965: 25.0 C, +0.5 C from the station mean1966: 24.9 C, +0.3 C from the station mean1967: 24.6 C, +0.1 C from the station mean1968: 24.9 C, +0.3 C from the station mean1969: 25.6 C, +1.0 C from the station mean1970: 25.2 C, +0.6 C from the station mean1971: 24.8 C, +0.3 C from the station mean1972: 22.4 C, -2.1 C from the station mean1973: 23.1 C, -1.4 C from the station mean1974: 24.7 C, +0.1 C from the station mean1975: 25.0 C, +0.5 C from the station mean1978: 23.4 C, -1.2 C from the station mean1979: 23.4 C, -1.2 C from the station mean1980: 23.5 C, -1.1 C from the station mean1982: 23.5 C, -1.0 C from the station mean1983: 22.9 C, -1.7 C from the station mean1984: 20.9 C, -3.7 C from the station mean1986: 23.2 C, -1.3 C from the station mean2007: 27.9 C, +3.4 C from the station mean2008: 27.4 C, +2.8 C from the station mean2009: 29.2 C, +4.7 C from the station mean1945195019601970198019902000
One stripe for each of 41 complete years at Acatlan de Osorio (Smn), 1945 to 2009. Blue stripes are years cooler than the station's own mean of 24.6 C (76.2 F); red stripes are warmer. The coolest year was 1984, at 20.9 C (69.6 F), and the warmest was 2009, at 29.2 C (84.6 F). The strongest colour marks a difference of 4.7 C (8.5 F).
Annual mean temperature at Acatlan de Osorio (Smn) as warming stripes, 1945 to 2009
YearAnnual mean temperatureDifference from the station mean
194525.4 C+0.83 C
194625.2 C+0.61 C
194724.9 C+0.37 C
194825.4 C+0.87 C
194924.4 C-0.20 C
195024.2 C-0.35 C
195124.9 C+0.33 C
195224.8 C+0.21 C
195325.0 C+0.41 C
195424.1 C-0.47 C
195523.7 C-0.82 C
195623.9 C-0.68 C
195724.6 C-0.01 C
195824.3 C-0.30 C
195924.7 C+0.14 C
196023.2 C-1.39 C
196121.7 C-2.83 C
196226.3 C+1.73 C
196325.6 C+1.08 C
196425.4 C+0.81 C
196525.0 C+0.45 C
196624.9 C+0.31 C
196724.6 C+0.05 C
196824.9 C+0.30 C
196925.6 C+0.99 C
197025.2 C+0.63 C
197124.8 C+0.26 C
197222.4 C-2.12 C
197323.1 C-1.43 C
197424.7 C+0.09 C
197525.0 C+0.48 C
197823.4 C-1.21 C
197923.4 C-1.20 C
198023.5 C-1.11 C
198223.5 C-1.03 C
198322.9 C-1.70 C
198420.9 C-3.68 C
198623.2 C-1.34 C
200727.9 C+3.38 C
200827.4 C+2.82 C
200929.2 C+4.67 C

The fitted trend in annual mean temperature here over 1945 to 2009 is 0.2 C (-0.1 to 0.5) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.4 F (-0.1 to 0.9) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Acatlan de Osorio (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (-0.1 to 0.5) per decade0.4 F (-0.1 to 0.9) per decade1945 to 200941Not clearly different from zero
Mean daily maximum0.31 C (0.05 to 0.58) per decade0.6 F (0.1 to 1.0) per decade1945 to 200941Rise
Mean daily minimum0.1 C (-0.4 to 0.7) per decade0.3 F (-0.7 to 1.2) per decade1945 to 200941Not 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

1943 to 2009
Yearly extremes at Acatlan de Osorio (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)46.1 C (115.0 F)194840.0 C (104.0 F)47
Coldest night (TNn)-6.1 C (21.0 F)19615.6 C (42.1 F)47
Wettest day (Rx1day)143.3 mm (5.6 in)194557.7 mm (2.3 in)48
Wettest five days (Rx5day)197.1 mm (7.8 in)1965112.6 mm (4.4 in)48
Longest dry spell (CDD)133 days197084 days48

Hottest day (TXx)

Hottest day (TXx) at Acatlan de Osorio (Smn) by year The hottest day of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 46.1 C (115.0 F) in 1948, marked on the chart; the median year is 40.0 C (104.0 F). 35404550196019802000Record: 46.1 C (115.0 F) in 1948
The hottest day of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 46.1 C (115.0 F) in 1948, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Acatlan de Osorio (Smn) by year
YearHottest day (TXx)
1943n/a
194435.0 C (95.0 F)
194540.6 C (105.1 F)
194641.1 C (106.0 F)
194740.6 C (105.1 F)
194846.1 C (115.0 F)
194940.0 C (104.0 F)
195040.0 C (104.0 F)
195140.0 C (104.0 F)
195241.1 C (106.0 F)
195340.0 C (104.0 F)
195439.4 C (102.9 F)
195538.9 C (102.0 F)
195637.8 C (100.0 F)
195740.0 C (104.0 F)
195838.9 C (102.0 F)
195945.6 C (114.1 F)
196045.0 C (113.0 F)
196143.9 C (111.0 F)
196243.9 C (111.0 F)
196341.7 C (107.1 F)
196441.1 C (106.0 F)
196540.0 C (104.0 F)
196640.0 C (104.0 F)
196740.6 C (105.1 F)
196840.0 C (104.0 F)
196940.0 C (104.0 F)
197040.0 C (104.0 F)
197140.0 C (104.0 F)
197240.0 C (104.0 F)
197341.7 C (107.1 F)
197440.0 C (104.0 F)
197541.1 C (106.0 F)
197641.1 C (106.0 F)
197738.9 C (102.0 F)
197840.0 C (104.0 F)
197938.9 C (102.0 F)
198037.8 C (100.0 F)
198140.0 C (104.0 F)
198241.1 C (106.0 F)
198340.0 C (104.0 F)
198441.7 C (107.1 F)
198543.9 C (111.0 F)
198637.8 C (100.0 F)
198735.0 C (95.0 F)
200742.8 C (109.0 F)
200841.7 C (107.1 F)
200945.0 C (113.0 F)

Coldest night (TNn)

Coldest night (TNn) at Acatlan de Osorio (Smn) by year The coldest night of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is -6.1 C (21.0 F) in 1961, marked on the chart; the median year is 5.6 C (42.1 F). -1001020196019802000Record: -6.1 C (21.0 F) in 1961
The coldest night of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is -6.1 C (21.0 F) in 1961, marked on the chart; the median year is 5.6 C (42.1 F).
Coldest night (TNn) at Acatlan de Osorio (Smn) by year
YearColdest night (TNn)
1943n/a
194410.6 C (51.1 F)
19458.3 C (46.9 F)
194610.0 C (50.0 F)
19477.8 C (46.0 F)
19486.1 C (43.0 F)
19493.9 C (39.0 F)
19503.9 C (39.0 F)
19515.0 C (41.0 F)
19525.0 C (41.0 F)
19531.7 C (35.1 F)
19545.6 C (42.1 F)
19553.9 C (39.0 F)
19563.3 C (37.9 F)
19575.6 C (42.1 F)
19588.9 C (48.0 F)
19596.7 C (44.1 F)
19600.6 C (33.1 F)
1961-6.1 C (21.0 F)
19627.8 C (46.0 F)
19635.0 C (41.0 F)
19648.9 C (48.0 F)
19657.8 C (46.0 F)
19665.6 C (42.1 F)
19675.0 C (41.0 F)
19686.7 C (44.1 F)
19697.8 C (46.0 F)
19707.8 C (46.0 F)
19717.8 C (46.0 F)
19720.6 C (33.1 F)
19730.6 C (33.1 F)
19747.8 C (46.0 F)
19757.2 C (45.0 F)
19766.7 C (44.1 F)
19775.0 C (41.0 F)
19786.7 C (44.1 F)
19797.8 C (46.0 F)
19805.6 C (42.1 F)
19810.6 C (33.1 F)
19825.6 C (42.1 F)
19830.6 C (33.1 F)
19840.0 C (32.0 F)
19851.7 C (35.1 F)
19865.0 C (41.0 F)
19870.6 C (33.1 F)
20076.7 C (44.1 F)
200812.8 C (55.0 F)
200915.0 C (59.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Acatlan de Osorio (Smn) by year The wettest day of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 143.3 mm (5.6 in) in 1945, marked on the chart; the median year is 57.7 mm (2.3 in). 050100150196019802000Record: 143.3 mm (5.6 in) in 1945
The wettest day of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 143.3 mm (5.6 in) in 1945, marked on the chart; the median year is 57.7 mm (2.3 in).
Wettest day (Rx1day) at Acatlan de Osorio (Smn) by year
YearWettest day (Rx1day)
194361.5 mm (2.4 in)
194443.9 mm (1.7 in)
1945143.3 mm (5.6 in)
194634.8 mm (1.4 in)
194747.5 mm (1.9 in)
194847.0 mm (1.9 in)
194943.9 mm (1.7 in)
195032.8 mm (1.3 in)
195168.8 mm (2.7 in)
195249.3 mm (1.9 in)
195355.9 mm (2.2 in)
195452.1 mm (2.1 in)
195559.4 mm (2.3 in)
195659.9 mm (2.4 in)
195762.0 mm (2.4 in)
195868.8 mm (2.7 in)
195947.0 mm (1.9 in)
196049.8 mm (2.0 in)
196147.5 mm (1.9 in)
196295.8 mm (3.8 in)
196379.8 mm (3.1 in)
196430.0 mm (1.2 in)
196584.8 mm (3.3 in)
196642.9 mm (1.7 in)
196769.9 mm (2.8 in)
196859.9 mm (2.4 in)
196979.8 mm (3.1 in)
197064.8 mm (2.6 in)
197179.8 mm (3.1 in)
197279.8 mm (3.1 in)
197339.9 mm (1.6 in)
197453.8 mm (2.1 in)
197543.9 mm (1.7 in)
197649.8 mm (2.0 in)
197751.8 mm (2.0 in)
197889.9 mm (3.5 in)
197974.9 mm (2.9 in)
198089.9 mm (3.5 in)
198195.8 mm (3.8 in)
198274.9 mm (2.9 in)
198352.8 mm (2.1 in)
198499.8 mm (3.9 in)
198549.8 mm (2.0 in)
198693.5 mm (3.7 in)
19870.0 mm (0.00 in)
200742.4 mm (1.7 in)
200850.3 mm (2.0 in)
200995.0 mm (3.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Acatlan de Osorio (Smn) by year The wettest five days of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 197.1 mm (7.8 in) in 1965, marked on the chart; the median year is 112.6 mm (4.4 in). 050100150200196019802000Record: 197.1 mm (7.8 in) in 1965
The wettest five days of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 197.1 mm (7.8 in) in 1965, marked on the chart; the median year is 112.6 mm (4.4 in).
Wettest five days (Rx5day) at Acatlan de Osorio (Smn) by year
YearWettest five days (Rx5day)
1943123.3 mm (4.9 in)
194485.1 mm (3.4 in)
1945150.2 mm (5.9 in)
194669.4 mm (2.7 in)
1947119.4 mm (4.7 in)
194892.7 mm (3.6 in)
194965.3 mm (2.6 in)
195068.3 mm (2.7 in)
1951113.7 mm (4.5 in)
195267.9 mm (2.7 in)
195360.7 mm (2.4 in)
195483.1 mm (3.3 in)
1955126.2 mm (5.0 in)
1956135.4 mm (5.3 in)
195770.7 mm (2.8 in)
1958159.5 mm (6.3 in)
195991.4 mm (3.6 in)
196072.6 mm (2.9 in)
196194.7 mm (3.7 in)
1962120.2 mm (4.7 in)
1963169.7 mm (6.7 in)
1964106.2 mm (4.2 in)
1965197.1 mm (7.8 in)
196667.8 mm (2.7 in)
1967138.7 mm (5.5 in)
1968139.6 mm (5.5 in)
1969141.5 mm (5.6 in)
1970131.4 mm (5.2 in)
1971167.6 mm (6.6 in)
197279.8 mm (3.1 in)
197369.4 mm (2.7 in)
197490.4 mm (3.6 in)
1975107.5 mm (4.2 in)
1976129.6 mm (5.1 in)
1977139.5 mm (5.5 in)
1978146.8 mm (5.8 in)
1979117.1 mm (4.6 in)
1980145.5 mm (5.7 in)
1981155.5 mm (6.1 in)
1982111.5 mm (4.4 in)
1983100.3 mm (3.9 in)
1984146.4 mm (5.8 in)
198599.6 mm (3.9 in)
198694.8 mm (3.7 in)
19870.0 mm (0.00 in)
200780.3 mm (3.2 in)
2008138.1 mm (5.4 in)
2009157.3 mm (6.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Acatlan de Osorio (Smn) by year The longest dry spell of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 133 days in 1970, marked on the chart; the median year is 84 days. 050100150196019802000Record: 133 days in 1970
The longest dry spell of the year at Acatlan de Osorio (Smn), 1943 to 2009. The record is 133 days in 1970, marked on the chart; the median year is 84 days.
Longest dry spell (CDD) at Acatlan de Osorio (Smn) by year
YearLongest dry spell (CDD)
194341 days
1944122 days
1945109 days
194687 days
1947106 days
194898 days
194985 days
195070 days
195176 days
195292 days
195390 days
195479 days
195585 days
1956109 days
195767 days
195861 days
195983 days
1960128 days
196194 days
1962101 days
196365 days
196464 days
196598 days
196682 days
196788 days
196855 days
1969111 days
1970133 days
197191 days
1972109 days
1973101 days
197463 days
1975116 days
197659 days
197730 days
197868 days
197966 days
198071 days
198161 days
198279 days
198371 days
1984114 days
198581 days
198699 days
198759 days
200737 days
200888 days
200962 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, 1944 to 2009

A day with at least 58.9 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 140.0 mm (5.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Acatlan de Osorio (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years58.9 mm (2.3 in)
5 years78.9 mm (3.1 in)
10 years92.8 mm (3.7 in)
25 years111.1 mm (4.4 in)
50 years125.3 mm (4.9 in)Longer than the 44 years of record
100 years140.0 mm (5.5 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 1944 to 2009.

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: 143.3 mm (5.6 in) in 1945; 99.8 mm (3.9 in) in 1984; 95.8 mm (3.8 in) in 1962.

Download the Data

  • Data for Acatlan de Osorio (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Acatlan de Osorio (Smn) 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).