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Atoyac (Smn) Weather Records (MXN00012011)

Record envelope, standing records and threshold days for Atoyac (Smn) (MXN00012011), Mexico, with 67 years of record.

Key Facts for Atoyac (Smn)

  • Atoyac (Smn) (MXN00012011) is a weather station in Mexico at 17.22 latitude and -100.45 longitude, 240 m (787 ft) above sea level.
  • The station reports from 1922 to 1988, 67 years of record.
  • 1,464 records set at Atoyac (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Atoyac (Smn) tied a daily record low minimum temperature of 20.0 C (68.0 F) on 19 January 1988.

About the Station

  • Location: Mexico, 17.22 latitude, -100.45 longitude.
  • Elevation: 240 m (787 ft).
  • Period of record: 1922 to 1988, 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 Atoyac (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Atoyac (Smn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 1020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Atoyac (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 Atoyac (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan43.9 C (111.0 F)11.7 C (53.1 F)n/an/a
Feb40.0 C (104.0 F)15.6 C (60.1 F)n/an/a
Mar41.7 C (107.1 F)10.0 C (50.0 F)n/an/a
Apr45.0 C (113.0 F)13.9 C (57.0 F)n/an/a
May46.7 C (116.1 F)12.8 C (55.0 F)n/an/a
Jun46.7 C (116.1 F)10.6 C (51.1 F)n/an/a
Jul41.1 C (106.0 F)20.0 C (68.0 F)n/an/a
Aug40.6 C (105.1 F)20.0 C (68.0 F)n/an/a
Sep40.0 C (104.0 F)20.0 C (68.0 F)n/an/a
Oct42.8 C (109.0 F)16.7 C (62.1 F)n/an/a
Nov45.0 C (113.0 F)15.0 C (59.0 F)n/an/a
Dec47.8 C (118.0 F)17.2 C (63.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Atoyac (Smn) by the year they were set 1,464 records at Atoyac (Smn) still stand. 1953 holds the most, with 126. 0501001501922: 521923: 331924: 171925: 531926: 711927: 281928: 441929: 431930: 431931: 61942: 1011943: 221945: 151946: 191947: 441948: 351949: 11950: 341951: 741953: 1261954: 281956: 561957: 151958: 131959: 511960: 381961: 751962: 161963: 81964: 71965: 121966: 51967: 41968: 111970: 61971: 121972: 71973: 71974: 21975: 81976: 361977: 561978: 91979: 251980: 111981: 331982: 81983: 261984: 81985: 61986: 4192219281945195119591965197219781984
1,464 records at Atoyac (Smn) still stand. 1953 holds the most, with 126.
Standing records at Atoyac (Smn) by the year they were set
Year setStanding records
192252
192333
192417
192553
192671
192728
192844
192943
193043
19316
1942101
194322
194515
194619
194744
194835
19491
195034
195174
1953126
195428
195656
195715
195813
195951
196038
196175
196216
19638
19647
196512
19665
19674
196811
19706
197112
19727
19737
19742
19758
197636
197756
19789
197925
198011
198133
19828
198326
19848
19856
19864

Wettest Day of Each Month

Sep: 279.9 mm (11.0 in)
Record daily precipitation for each month at Atoyac (Smn) The wettest day on record for each calendar month at Atoyac (Smn). The most was 279.9 mm (11.0 in) on 28 September 1954. 0100200300 Jan: 33.8 mm (1.3 in), 24 January 1980 Jan Feb: 49.8 mm (2.0 in), 5 February 1957 Feb Mar: 36.8 mm (1.4 in), 4 March 1968 Mar Apr: 22.9 mm (0.9 in), 13 April 1948 Apr May: 120.9 mm (4.8 in), 28 May 1947 May Jun: 158.5 mm (6.2 in), 8 June 1922 Jun Jul: 215.9 mm (8.5 in), 31 July 1926 Jul Aug: 221.0 mm (8.7 in), 25 August 1950 Aug Sep: 279.9 mm (11.0 in), 28 September 1954 Sep Oct: 164.8 mm (6.5 in), 14 October 1923 Oct Nov: 102.9 mm (4.1 in), 10 November 1925 Nov Dec: 67.8 mm (2.7 in), 15 December 1925 Dec
The wettest day on record for each calendar month at Atoyac (Smn). The most was 279.9 mm (11.0 in) on 28 September 1954.
Record daily precipitation for each month at Atoyac (Smn)
MonthRecord daily precipitation (mm)Date
Jan33.8 mm (1.3 in)24 January 1980
Feb49.8 mm (2.0 in)5 February 1957
Mar36.8 mm (1.4 in)4 March 1968
Apr22.9 mm (0.9 in)13 April 1948
May120.9 mm (4.8 in)28 May 1947
Jun158.5 mm (6.2 in)8 June 1922
Jul215.9 mm (8.5 in)31 July 1926
Aug221.0 mm (8.7 in)25 August 1950
Sep279.9 mm (11.0 in)28 September 1954
Oct164.8 mm (6.5 in)14 October 1923
Nov102.9 mm (4.1 in)10 November 1925
Dec67.8 mm (2.7 in)15 December 1925

Period of Record Coverage

1922 to 1988
Days with data per year at Atoyac (Smn) 54 years of record at Atoyac (Smn), 1922 to 1988. 23 years have data for under 90 percent of days and are left out of rankings: 1925, 1942, 1948, 1949, 1950, 1951, 1953, 1954 and others. 1922: 363 of 365 days1923: 365 of 365 days1924: 366 of 366 days1925: 184 of 365 days1926: 365 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 365 of 365 days1942: 179 of 365 days1943: 334 of 365 days1945: 362 of 365 days1946: 364 of 365 days1947: 358 of 365 days1948: 319 of 366 days1949: 223 of 365 days1950: 269 of 365 days1951: 120 of 365 days1953: 280 of 365 days1954: 292 of 365 days1955: 2 of 365 days1956: 188 of 366 days1957: 363 of 365 days1958: 309 of 365 days1959: 273 of 365 days1960: 363 of 366 days1961: 357 of 365 days1962: 360 of 365 days1963: 363 of 365 days1964: 363 of 366 days1965: 365 of 365 days1966: 364 of 365 days1967: 363 of 365 days1968: 364 of 366 days1970: 364 of 365 days1971: 362 of 365 days1972: 359 of 366 days1973: 363 of 365 days1974: 351 of 365 days1975: 355 of 365 days1976: 266 of 366 days1977: 149 of 365 days1978: 130 of 365 days1979: 147 of 365 days1980: 141 of 366 days1981: 146 of 365 days1982: 163 of 365 days1983: 361 of 365 days1984: 365 of 366 days1985: 303 of 365 days1986: 304 of 365 days1987: 93 of 365 days1988: 31 of 366 days19301950196019701980
54 years of record at Atoyac (Smn), 1922 to 1988. 23 years have data for under 90 percent of days and are left out of rankings: 1925, 1942, 1948, 1949, 1950, 1951, 1953, 1954 and others.
Days with data per year at Atoyac (Smn)
YearDays with dataShare of yearComplete
192236399%Yes
1923365100%Yes
1924366100%Yes
192518450%No
1926365100%Yes
1927365100%Yes
1928366100%Yes
1929365100%Yes
1930365100%Yes
1931365100%Yes
194217949%No
194333492%Yes
194536299%Yes
1946364100%Yes
194735898%Yes
194831987%No
194922361%No
195026974%No
195112033%No
195328077%No
195429280%No
195521%No
195618851%No
195736399%Yes
195830985%No
195927375%No
196036399%Yes
196135798%Yes
196236099%Yes
196336399%Yes
196436399%Yes
1965365100%Yes
1966364100%Yes
196736399%Yes
196836499%Yes
1970364100%Yes
197136299%Yes
197235998%Yes
197336399%Yes
197435196%Yes
197535597%Yes
197626673%No
197714941%No
197813036%No
197914740%No
198014139%No
198114640%No
198216345%No
198336199%Yes
1984365100%Yes
198530383%No
198630483%No
19879325%No
1988318%No

Latest Records

20
Latest records at Atoyac (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
19 January 1988Atoyac (Smn), MXdaily low min (Tie)20.0 C (68.0 F)tie61 years6 of 100 (Routine)
18 January 1988Atoyac (Smn), MXdaily low min (Tie)20.0 C (68.0 F)tie65 years6 of 100 (Routine)
21 May 1987Atoyac (Smn), MXdaily rain30.0 mm (1.2 in)18.6 mm (0.7 in)64 years36 of 100 (Notable)
30 April 1987Atoyac (Smn), MXdaily rain2.3 mm (0.09 in)2.3 mm (0.09 in)64 years20 of 100 (Routine)
19 October 1986Atoyac (Smn), MXdaily low min (Tie)21.7 C (71.1 F)tie64 years6 of 100 (Routine)
5 October 1986Atoyac (Smn), MXdaily rain72.9 mm (2.9 in)31.0 mm (1.2 in)40 years32 of 100 (Routine)
5 October 1986Atoyac (Smn), MXdaily low max (Tie)26.7 C (80.1 F)tie40 years4 of 100 (Routine)
29 September 1986Atoyac (Smn), MXdaily low max26.7 C (80.1 F)2.2 C (4.0 F)60 years31 of 100 (Routine)
29 September 1986Atoyac (Smn), MXdaily rain86.9 mm (3.4 in)8.9 mm (0.35 in)28 years17 of 100 (Routine)
10 September 1986Atoyac (Smn), MXdaily rain75.9 mm (3.0 in)18.0 mm (0.7 in)32 years21 of 100 (Routine)
6 September 1986Atoyac (Smn), MXdaily low min20.6 C (69.1 F)1.1 C (2.0 F)61 years31 of 100 (Routine)
3 September 1986Atoyac (Smn), MXmonthly low min (Tie)20.0 C (68.0 F)tie13 years5 of 100 (Routine)
25 August 1986Atoyac (Smn), MXdaily low min21.7 C (71.1 F)0.5 C (0.9 F)15 years13 of 100 (Routine)
22 August 1986Atoyac (Smn), MXdaily low min (Tie)21.7 C (71.1 F)tie64 years6 of 100 (Routine)
20 August 1986Atoyac (Smn), MXdaily low min (Tie)22.8 C (73.0 F)tie64 years6 of 100 (Routine)
16 August 1986Atoyac (Smn), MXdaily low max (Tie)26.7 C (80.1 F)tie39 years4 of 100 (Routine)
10 August 1986Atoyac (Smn), MXdaily high min (Tie)26.7 C (80.1 F)tie55 years5 of 100 (Routine)
9 August 1986Atoyac (Smn), MXdaily high min (Tie)26.7 C (80.1 F)tie32 years3 of 100 (Routine)
30 July 1986Atoyac (Smn), MXmonthly low min (Tie)20.0 C (68.0 F)tie43 years7 of 100 (Routine)
30 June 1986Atoyac (Smn), MXdaily rain10.4 mm (0.4 in)1.0 mm (0.04 in)55 years20 of 100 (Routine)

Climate Trend

29 complete years, 1922 to 1984
Annual mean temperature at Atoyac (Smn) as warming stripes, 1922 to 1984 One stripe for each of 29 complete years at Atoyac (Smn), 1922 to 1984. Blue stripes are years cooler than the station's own mean of 28.5 C (83.3 F); red stripes are warmer. The coolest year was 1983, at 27.1 C (80.9 F), and the warmest was 1928, at 30.7 C (87.3 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1922: 28.1 C, -0.4 C from the station mean1923: 28.1 C, -0.4 C from the station mean1924: 28.1 C, -0.4 C from the station mean1926: 30.6 C, +2.0 C from the station mean1927: 30.3 C, +1.8 C from the station mean1928: 30.7 C, +2.2 C from the station mean1929: 30.1 C, +1.5 C from the station mean1930: 30.0 C, +1.5 C from the station mean1931: 29.6 C, +1.1 C from the station mean1945: 27.4 C, -1.2 C from the station mean1946: 27.6 C, -0.9 C from the station mean1947: 27.6 C, -1.0 C from the station mean1957: 28.6 C, +0.1 C from the station mean1960: 29.5 C, +1.0 C from the station mean1961: 29.4 C, +0.9 C from the station mean1962: 28.7 C, +0.2 C from the station mean1963: 28.5 C, 0.0 C from the station mean1964: 27.9 C, -0.6 C from the station mean1965: 28.3 C, -0.2 C from the station mean1966: 28.2 C, -0.3 C from the station mean1967: 28.1 C, -0.4 C from the station mean1968: 27.9 C, -0.6 C from the station mean1970: 28.2 C, -0.4 C from the station mean1971: 27.9 C, -0.6 C from the station mean1972: 28.5 C, 0.0 C from the station mean1973: 27.8 C, -0.8 C from the station mean1975: 27.3 C, -1.2 C from the station mean1983: 27.1 C, -1.4 C from the station mean1984: 27.2 C, -1.4 C from the station mean1922193019401950196019701980
One stripe for each of 29 complete years at Atoyac (Smn), 1922 to 1984. Blue stripes are years cooler than the station's own mean of 28.5 C (83.3 F); red stripes are warmer. The coolest year was 1983, at 27.1 C (80.9 F), and the warmest was 1928, at 30.7 C (87.3 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Atoyac (Smn) as warming stripes, 1922 to 1984
YearAnnual mean temperatureDifference from the station mean
192228.1 C-0.38 C
192328.1 C-0.41 C
192428.1 C-0.38 C
192630.6 C+2.03 C
192730.3 C+1.75 C
192830.7 C+2.18 C
192930.1 C+1.53 C
193030.0 C+1.46 C
193129.6 C+1.12 C
194527.4 C-1.16 C
194627.6 C-0.94 C
194727.6 C-0.96 C
195728.6 C+0.10 C
196029.5 C+0.95 C
196129.4 C+0.85 C
196228.7 C+0.16 C
196328.5 C-0.04 C
196427.9 C-0.59 C
196528.3 C-0.20 C
196628.2 C-0.29 C
196728.1 C-0.44 C
196827.9 C-0.64 C
197028.2 C-0.37 C
197127.9 C-0.59 C
197228.5 C-0.02 C
197327.8 C-0.76 C
197527.3 C-1.22 C
198327.1 C-1.38 C
198427.2 C-1.36 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1922 to 1988
Yearly extremes at Atoyac (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)47.8 C (118.0 F)195638.1 C (100.5 F)54
Coldest night (TNn)10.0 C (50.0 F)194219.4 C (66.9 F)54
Wettest day (Rx1day)279.9 mm (11.0 in)195487.9 mm (3.5 in)54
Wettest five days (Rx5day)607.3 mm (23.9 in)1954144.6 mm (5.7 in)54
Longest dry spell (CDD)175 days1963121 days54

Hottest day (TXx)

Hottest day (TXx) at Atoyac (Smn) by year The hottest day of the year at Atoyac (Smn), 1922 to 1988. The record is 47.8 C (118.0 F) in 1956, marked on the chart; the median year is 38.1 C (100.5 F). 3035404550194019601980Record: 47.8 C (118.0 F) in 1956
The hottest day of the year at Atoyac (Smn), 1922 to 1988. The record is 47.8 C (118.0 F) in 1956, marked on the chart; the median year is 38.1 C (100.5 F).
Hottest day (TXx) at Atoyac (Smn) by year
YearHottest day (TXx)
192240.0 C (104.0 F)
192337.8 C (100.0 F)
192438.3 C (100.9 F)
192540.6 C (105.1 F)
192646.7 C (116.1 F)
192740.0 C (104.0 F)
192841.1 C (106.0 F)
192940.6 C (105.1 F)
193040.6 C (105.1 F)
193140.0 C (104.0 F)
194241.7 C (107.1 F)
194336.7 C (98.1 F)
194536.7 C (98.1 F)
194637.8 C (100.0 F)
194737.8 C (100.0 F)
194835.0 C (95.0 F)
194935.6 C (96.1 F)
195038.9 C (102.0 F)
195138.3 C (100.9 F)
195345.0 C (113.0 F)
195438.9 C (102.0 F)
195535.0 C (95.0 F)
195647.8 C (118.0 F)
195743.9 C (111.0 F)
195837.8 C (100.0 F)
195937.8 C (100.0 F)
196038.9 C (102.0 F)
196137.8 C (100.0 F)
196237.8 C (100.0 F)
196338.9 C (102.0 F)
196437.8 C (100.0 F)
196537.8 C (100.0 F)
196637.8 C (100.0 F)
196738.9 C (102.0 F)
196838.9 C (102.0 F)
197038.9 C (102.0 F)
197138.3 C (100.9 F)
197238.3 C (100.9 F)
197337.2 C (99.0 F)
197436.7 C (98.1 F)
197538.9 C (102.0 F)
197636.1 C (97.0 F)
197736.1 C (97.0 F)
197831.7 C (89.1 F)
197940.0 C (104.0 F)
198033.3 C (91.9 F)
198136.1 C (97.0 F)
198236.7 C (98.1 F)
198336.7 C (98.1 F)
198438.9 C (102.0 F)
198537.8 C (100.0 F)
198637.8 C (100.0 F)
198738.9 C (102.0 F)
198834.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Atoyac (Smn) by year The coldest night of the year at Atoyac (Smn), 1922 to 1988. The record is 10.0 C (50.0 F) in 1942, marked on the chart; the median year is 19.4 C (66.9 F). 10152025194019601980Record: 10.0 C (50.0 F) in 1942
The coldest night of the year at Atoyac (Smn), 1922 to 1988. The record is 10.0 C (50.0 F) in 1942, marked on the chart; the median year is 19.4 C (66.9 F).
Coldest night (TNn) at Atoyac (Smn) by year
YearColdest night (TNn)
192216.7 C (62.1 F)
192316.7 C (62.1 F)
192416.7 C (62.1 F)
192520.0 C (68.0 F)
192616.7 C (62.1 F)
192718.9 C (66.0 F)
192817.2 C (63.0 F)
192916.7 C (62.1 F)
193017.8 C (64.0 F)
193120.0 C (68.0 F)
194210.0 C (50.0 F)
194317.8 C (64.0 F)
194520.0 C (68.0 F)
194620.0 C (68.0 F)
194720.0 C (68.0 F)
194820.6 C (69.1 F)
194920.0 C (68.0 F)
195020.0 C (68.0 F)
195121.7 C (71.1 F)
195312.8 C (55.0 F)
195420.0 C (68.0 F)
195522.8 C (73.0 F)
195620.6 C (69.1 F)
195716.7 C (62.1 F)
195818.9 C (66.0 F)
195920.6 C (69.1 F)
196020.6 C (69.1 F)
196118.9 C (66.0 F)
196218.9 C (66.0 F)
196315.0 C (59.0 F)
196420.0 C (68.0 F)
196515.0 C (59.0 F)
196618.9 C (66.0 F)
196718.9 C (66.0 F)
196816.7 C (62.1 F)
197016.7 C (62.1 F)
197113.9 C (57.0 F)
197219.4 C (66.9 F)
197318.9 C (66.0 F)
197415.0 C (59.0 F)
197519.4 C (66.9 F)
197618.3 C (64.9 F)
197711.7 C (53.1 F)
197820.6 C (69.1 F)
197920.0 C (68.0 F)
198020.0 C (68.0 F)
198120.0 C (68.0 F)
198220.0 C (68.0 F)
198320.0 C (68.0 F)
198420.0 C (68.0 F)
198520.0 C (68.0 F)
198620.0 C (68.0 F)
198721.1 C (70.0 F)
198820.0 C (68.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Atoyac (Smn) by year The wettest day of the year at Atoyac (Smn), 1922 to 1988. The record is 279.9 mm (11.0 in) in 1954, marked on the chart; the median year is 87.9 mm (3.5 in). 0100200300194019601980Record: 279.9 mm (11.0 in) in 1954
The wettest day of the year at Atoyac (Smn), 1922 to 1988. The record is 279.9 mm (11.0 in) in 1954, marked on the chart; the median year is 87.9 mm (3.5 in).
Wettest day (Rx1day) at Atoyac (Smn) by year
YearWettest day (Rx1day)
1922158.5 mm (6.2 in)
1923164.8 mm (6.5 in)
1924104.9 mm (4.1 in)
1925102.9 mm (4.1 in)
1926215.9 mm (8.5 in)
1927120.7 mm (4.8 in)
1928112.8 mm (4.4 in)
1929106.9 mm (4.2 in)
1930142.7 mm (5.6 in)
193194.5 mm (3.7 in)
19424.8 mm (0.19 in)
1943109.0 mm (4.3 in)
194583.8 mm (3.3 in)
194691.9 mm (3.6 in)
1947120.9 mm (4.8 in)
194898.8 mm (3.9 in)
194995.0 mm (3.7 in)
1950221.0 mm (8.7 in)
19510.0 mm (0.00 in)
195334.8 mm (1.4 in)
1954279.9 mm (11.0 in)
195533.8 mm (1.3 in)
195678.0 mm (3.1 in)
1957209.8 mm (8.3 in)
195899.8 mm (3.9 in)
195999.8 mm (3.9 in)
1960101.9 mm (4.0 in)
196178.0 mm (3.1 in)
196231.8 mm (1.3 in)
196391.9 mm (3.6 in)
196465.3 mm (2.6 in)
196563.8 mm (2.5 in)
196642.9 mm (1.7 in)
196754.9 mm (2.2 in)
196882.8 mm (3.3 in)
1970102.9 mm (4.1 in)
197122.4 mm (0.9 in)
197245.0 mm (1.8 in)
197347.0 mm (1.9 in)
197469.9 mm (2.8 in)
197522.4 mm (0.9 in)
1976119.9 mm (4.7 in)
197760.5 mm (2.4 in)
197886.9 mm (3.4 in)
197923.9 mm (0.9 in)
198034.8 mm (1.4 in)
1981159.8 mm (6.3 in)
198264.3 mm (2.5 in)
198383.8 mm (3.3 in)
198488.9 mm (3.5 in)
198557.9 mm (2.3 in)
198686.9 mm (3.4 in)
198789.9 mm (3.5 in)
19880.0 mm (0.00 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Atoyac (Smn) by year The wettest five days of the year at Atoyac (Smn), 1922 to 1988. The record is 607.3 mm (23.9 in) in 1954, marked on the chart; the median year is 144.6 mm (5.7 in). 0200400600800194019601980Record: 607.3 mm (23.9 in) in 1954
The wettest five days of the year at Atoyac (Smn), 1922 to 1988. The record is 607.3 mm (23.9 in) in 1954, marked on the chart; the median year is 144.6 mm (5.7 in).
Wettest five days (Rx5day) at Atoyac (Smn) by year
YearWettest five days (Rx5day)
1922216.7 mm (8.5 in)
1923329.5 mm (13.0 in)
1924192.4 mm (7.6 in)
1925242.3 mm (9.5 in)
1926218.0 mm (8.6 in)
1927261.0 mm (10.3 in)
1928181.2 mm (7.1 in)
1929119.6 mm (4.7 in)
1930165.9 mm (6.5 in)
1931126.2 mm (5.0 in)
194214.2 mm (0.6 in)
1943230.5 mm (9.1 in)
1945115.6 mm (4.6 in)
1946165.6 mm (6.5 in)
1947169.4 mm (6.7 in)
1948246.6 mm (9.7 in)
1949156.4 mm (6.2 in)
1950240.8 mm (9.5 in)
19510.0 mm (0.00 in)
195378.2 mm (3.1 in)
1954607.3 mm (23.9 in)
195598.0 mm (3.9 in)
1956148.6 mm (5.9 in)
1957265.4 mm (10.4 in)
1958267.4 mm (10.5 in)
1959105.6 mm (4.2 in)
1960193.3 mm (7.6 in)
1961158.6 mm (6.2 in)
196286.3 mm (3.4 in)
1963126.7 mm (5.0 in)
196492.7 mm (3.6 in)
196588.7 mm (3.5 in)
1966111.2 mm (4.4 in)
1967140.5 mm (5.5 in)
1968130.3 mm (5.1 in)
1970239.5 mm (9.4 in)
197169.4 mm (2.7 in)
197294.3 mm (3.7 in)
1973122.7 mm (4.8 in)
1974149.6 mm (5.9 in)
197590.2 mm (3.6 in)
1976163.9 mm (6.5 in)
197779.3 mm (3.1 in)
1978181.6 mm (7.1 in)
197964.2 mm (2.5 in)
198094.2 mm (3.7 in)
1981306.7 mm (12.1 in)
1982134.5 mm (5.3 in)
1983169.7 mm (6.7 in)
1984223.8 mm (8.8 in)
1985111.0 mm (4.4 in)
1986126.5 mm (5.0 in)
198789.9 mm (3.5 in)
19880.0 mm (0.00 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Atoyac (Smn) by year The longest dry spell of the year at Atoyac (Smn), 1922 to 1988. The record is 175 days in 1963, marked on the chart; the median year is 121 days. 050100150200194019601980Record: 175 days in 1963
The longest dry spell of the year at Atoyac (Smn), 1922 to 1988. The record is 175 days in 1963, marked on the chart; the median year is 121 days.
Longest dry spell (CDD) at Atoyac (Smn) by year
YearLongest dry spell (CDD)
1922130 days
1923109 days
1924102 days
192512 days
1926141 days
1927131 days
1928116 days
1929148 days
1930139 days
1931141 days
1942145 days
194390 days
1945115 days
1946149 days
1947143 days
1948103 days
1949147 days
1950149 days
1951120 days
195386 days
195468 days
1955156 days
1956146 days
195791 days
195871 days
195941 days
1960157 days
1961135 days
1962156 days
1963175 days
1964159 days
1965144 days
196690 days
1967133 days
196873 days
1970100 days
197190 days
197253 days
197393 days
1974101 days
1975122 days
1976120 days
1977121 days
1978111 days
1979145 days
1980145 days
1981149 days
198283 days
198371 days
1984102 days
1985142 days
1986121 days
198788 days
198831 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

43 years, 1922 to 1984

A day with at least 87.6 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 291.3 mm (11.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Atoyac (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years87.6 mm (3.4 in)
5 years137.2 mm (5.4 in)
10 years171.9 mm (6.8 in)
25 years218.1 mm (8.6 in)
50 years254.0 mm (10.0 in)Longer than the 43 years of record
100 years291.3 mm (11.5 in)Longer than the 43 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, 43 years of values from 1922 to 1984.

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: 279.9 mm (11.0 in) in 1954; 221.0 mm (8.7 in) in 1950; 215.9 mm (8.5 in) in 1926.

Download the Data

  • Data for Atoyac (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Atoyac (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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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