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Atengo (Smn) Weather Records (MXN00014014)

Record envelope, standing records and threshold days for Atengo (Smn) (MXN00014014), Mexico, with 47 years of record.

Key Facts for Atengo (Smn)

  • Atengo (Smn) (MXN00014014) is a weather station in Mexico at 20.28 latitude and -104.25 longitude, 1,479 m (4,852 ft) above sea level.
  • The station reports from 1945 to 1991, 47 years of record.
  • 1,464 records set at Atengo (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Atengo (Smn) set a daily record low minimum temperature of 5.0 C (41.0 F) on 30 April 1991.

About the Station

  • Location: Mexico, 20.28 latitude, -104.25 longitude.
  • Elevation: 1,479 m (4,852 ft).
  • Period of record: 1945 to 1991, 47 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 Atengo (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Atengo (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 Atengo (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 Atengo (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan38.9 C (102.0 F)-10.0 C (14.0 F)n/an/a
Feb38.3 C (100.9 F)-12.2 C (10.0 F)n/an/a
Mar39.4 C (102.9 F)-9.4 C (15.1 F)n/an/a
Apr40.0 C (104.0 F)-8.3 C (17.1 F)n/an/a
May44.4 C (111.9 F)3.9 C (39.0 F)n/an/a
Jun42.8 C (109.0 F)5.6 C (42.1 F)n/an/a
Jul38.9 C (102.0 F)8.9 C (48.0 F)n/an/a
Aug39.4 C (102.9 F)10.0 C (50.0 F)n/an/a
Sep38.9 C (102.0 F)5.0 C (41.0 F)n/an/a
Oct38.3 C (100.9 F)5.6 C (42.1 F)n/an/a
Nov38.9 C (102.0 F)-7.2 C (19.0 F)n/an/a
Dec39.4 C (102.9 F)-9.4 C (15.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Atengo (Smn) by the year they were set 1,464 records at Atengo (Smn) still stand. 1972 holds the most, with 183. 0501001502001945: 541946: 481947: 1261948: 301949: 161950: 641951: 1501952: 881953: 41954: 211955: 141956: 281957: 341958: 111959: 101960: 41961: 191962: 121963: 131964: 11965: 31966: 81967: 851968: 371969: 221970: 111971: 341972: 1831973: 681974: 51975: 101976: 91977: 11978: 21979: 241980: 21981: 71982: 91983: 61987: 21988: 271989: 731990: 681991: 21194519501955196019651970197519801988
1,464 records at Atengo (Smn) still stand. 1972 holds the most, with 183.
Standing records at Atengo (Smn) by the year they were set
Year setStanding records
194554
194648
1947126
194830
194916
195064
1951150
195288
19534
195421
195514
195628
195734
195811
195910
19604
196119
196212
196313
19641
19653
19668
196785
196837
196922
197011
197134
1972183
197368
19745
197510
19769
19771
19782
197924
19802
19817
19829
19836
19872
198827
198973
199068
199121

All-Time Record Progression

5 new records
When Atengo (Smn) set new all-time records 5 all-time records were set at Atengo (Smn) between 12 July 1979 and 21 February 1990. Each dot is a new record. Record daily precipitationRecord low minimum temperature12 July 1979: Record daily precipitation 97.8 mm (3.9 in)20 November 1988: Record low minimum temperature -7.2 C (19.0 F)23 December 1988: Record low minimum temperature -8.3 C (17.1 F)24 January 1989: Record low minimum temperature -10.0 C (14.0 F)21 February 1990: Record low minimum temperature -12.2 C (10.0 F)198019851990
5 all-time records were set at Atengo (Smn) between 12 July 1979 and 21 February 1990. Each dot is a new record.
When Atengo (Smn) set new all-time records
DateKindDetail
1979-07-12Record daily precipitationRecord daily precipitation 97.8 mm (3.9 in)
1988-11-20Record low minimum temperatureRecord low minimum temperature -7.2 C (19.0 F)
1988-12-23Record low minimum temperatureRecord low minimum temperature -8.3 C (17.1 F)
1989-01-24Record low minimum temperatureRecord low minimum temperature -10.0 C (14.0 F)
1990-02-21Record low minimum temperatureRecord low minimum temperature -12.2 C (10.0 F)

Wettest Day of Each Month

Jul: 97.8 mm (3.9 in)
Record daily precipitation for each month at Atengo (Smn) The wettest day on record for each calendar month at Atengo (Smn). The most was 97.8 mm (3.9 in) on 12 July 1979. 0255075100 Jan: 48.8 mm (1.9 in), 23 January 1980 Jan Feb: 58.9 mm (2.3 in), 23 February 1981 Feb Mar: 49.8 mm (2.0 in), 4 March 1968 Mar Apr: 52.8 mm (2.1 in), 17 April 1959 Apr May: 55.9 mm (2.2 in), 26 May 1983 May Jun: 59.9 mm (2.4 in), 21 June 1975 Jun Jul: 97.8 mm (3.9 in), 12 July 1979 Jul Aug: 66.8 mm (2.6 in), 2 August 1963 Aug Sep: 85.9 mm (3.4 in), 3 September 1958 Sep Oct: 57.9 mm (2.3 in), 16 October 1958 Oct Nov: 71.9 mm (2.8 in), 16 November 1976 Nov Dec: 49.8 mm (2.0 in), 12 December 1963 Dec
The wettest day on record for each calendar month at Atengo (Smn). The most was 97.8 mm (3.9 in) on 12 July 1979.
Record daily precipitation for each month at Atengo (Smn)
MonthRecord daily precipitation (mm)Date
Jan48.8 mm (1.9 in)23 January 1980
Feb58.9 mm (2.3 in)23 February 1981
Mar49.8 mm (2.0 in)4 March 1968
Apr52.8 mm (2.1 in)17 April 1959
May55.9 mm (2.2 in)26 May 1983
Jun59.9 mm (2.4 in)21 June 1975
Jul97.8 mm (3.9 in)12 July 1979
Aug66.8 mm (2.6 in)2 August 1963
Sep85.9 mm (3.4 in)3 September 1958
Oct57.9 mm (2.3 in)16 October 1958
Nov71.9 mm (2.8 in)16 November 1976
Dec49.8 mm (2.0 in)12 December 1963

Period of Record Coverage

1945 to 1991
Days with data per year at Atengo (Smn) 45 years of record at Atengo (Smn), 1945 to 1991. 10 years have data for under 90 percent of days and are left out of rankings: 1945, 1948, 1973, 1977, 1984, 1987, 1988, 1989 and others. 1945: 181 of 365 days1946: 365 of 365 days1947: 355 of 365 days1948: 148 of 366 days1949: 329 of 365 days1950: 363 of 365 days1951: 331 of 365 days1952: 363 of 366 days1953: 365 of 365 days1954: 335 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 362 of 365 days1958: 364 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 364 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 121 of 365 days1974: 334 of 365 days1975: 365 of 365 days1976: 334 of 366 days1977: 328 of 365 days1978: 365 of 365 days1979: 361 of 365 days1980: 333 of 366 days1981: 364 of 365 days1982: 330 of 365 days1983: 358 of 365 days1984: 60 of 366 days1987: 58 of 365 days1988: 306 of 366 days1989: 280 of 365 days1990: 282 of 365 days1991: 48 of 365 days19501960197019801990
45 years of record at Atengo (Smn), 1945 to 1991. 10 years have data for under 90 percent of days and are left out of rankings: 1945, 1948, 1973, 1977, 1984, 1987, 1988, 1989 and others.
Days with data per year at Atengo (Smn)
YearDays with dataShare of yearComplete
194518150%No
1946365100%Yes
194735597%Yes
194814840%No
194932990%Yes
195036399%Yes
195133191%Yes
195236399%Yes
1953365100%Yes
195433592%Yes
1955365100%Yes
1956366100%Yes
195736299%Yes
1958364100%Yes
1959364100%Yes
1960366100%Yes
1961364100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972365100%Yes
197312133%No
197433492%Yes
1975365100%Yes
197633491%Yes
197732890%No
1978365100%Yes
197936199%Yes
198033391%Yes
1981364100%Yes
198233090%Yes
198335898%Yes
19846016%No
19875816%No
198830684%No
198928077%No
199028277%No
19914813%No

Latest Records

20
Latest records at Atengo (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
30 April 1991Atengo (Smn), MXdaily low min5.0 C (41.0 F)0.6 C (1.1 F)16 years9 of 100 (Routine)
24 April 1991Atengo (Smn), MXdaily high max38.9 C (102.0 F)1.1 C (2.0 F)20 years12 of 100 (Routine)
23 April 1991Atengo (Smn), MXmonthly high max (Tie)40.0 C (104.0 F)tie18 years4 of 100 (Routine)
21 April 1991Atengo (Smn), MXdaily high max (Tie)38.9 C (102.0 F)tie34 years3 of 100 (Routine)
20 April 1991Atengo (Smn), MXmonthly high max (Tie)40.0 C (104.0 F)tie18 years4 of 100 (Routine)
19 April 1991Atengo (Smn), MXdaily high max38.9 C (102.0 F)1.7 C (3.1 F)34 years17 of 100 (Routine)
16 April 1991Atengo (Smn), MXdaily high max (Tie)38.9 C (102.0 F)tie34 years3 of 100 (Routine)
15 April 1991Atengo (Smn), MXdaily high max37.8 C (100.0 F)2.2 C (4.0 F)34 years19 of 100 (Routine)
4 April 1991Atengo (Smn), MXdaily low min-3.3 C (26.1 F)6.1 C (11.0 F)20 years26 of 100 (Routine)
4 April 1991Atengo (Smn), MXdaily high max38.9 C (102.0 F)1.1 C (2.0 F)18 years11 of 100 (Routine)
3 April 1991Atengo (Smn), MXdaily low min (Tie)5.0 C (41.0 F)tie33 years3 of 100 (Routine)
28 February 1991Atengo (Smn), MXdaily low min (Tie)-5.0 C (23.0 F)tie1 year1 of 100 (Routine)
26 February 1991Atengo (Smn), MXdaily low min-9.4 C (15.1 F)10.5 C (18.9 F)8 years29 of 100 (Routine)
23 February 1991Atengo (Smn), MXdaily low min-7.2 C (19.0 F)2.2 C (4.0 F)1 year8 of 100 (Routine)
17 February 1991Atengo (Smn), MXdaily low min-9.4 C (15.1 F)11.6 C (20.9 F)12 years33 of 100 (Routine)
13 February 1991Atengo (Smn), MXdaily low min-8.3 C (17.1 F)6.1 C (11.0 F)0 years17 of 100 (Routine)
12 February 1991Atengo (Smn), MXdaily low min-7.2 C (19.0 F)5.0 C (9.0 F)0 years15 of 100 (Routine)
10 February 1991Atengo (Smn), MXdaily low min-4.4 C (24.1 F)2.2 C (4.0 F)1 year8 of 100 (Routine)
8 February 1991Atengo (Smn), MXdaily low min-8.3 C (17.1 F)3.9 C (7.0 F)0 years12 of 100 (Routine)
7 February 1991Atengo (Smn), MXdaily low min-6.1 C (21.0 F)7.8 C (14.0 F)25 years28 of 100 (Routine)

Climate Trend

27 complete years, 1946 to 1983
Annual mean temperature at Atengo (Smn) as warming stripes, 1946 to 1983 One stripe for each of 27 complete years at Atengo (Smn), 1946 to 1983. Blue stripes are years cooler than the station's own mean of 20.5 C (68.9 F); red stripes are warmer. The coolest year was 1961, at 18.4 C (65.0 F), and the warmest was 1972, at 23.8 C (74.8 F). The strongest colour marks a difference of 3.3 C (5.9 F). 1946: 20.4 C, -0.1 C from the station mean1947: 20.5 C, 0.0 C from the station mean1950: 20.3 C, -0.2 C from the station mean1952: 19.6 C, -0.9 C from the station mean1953: 19.5 C, -0.9 C from the station mean1955: 21.5 C, +1.0 C from the station mean1956: 23.6 C, +3.1 C from the station mean1957: 21.6 C, +1.1 C from the station mean1958: 19.7 C, -0.8 C from the station mean1959: 19.0 C, -1.5 C from the station mean1960: 19.5 C, -1.0 C from the station mean1961: 18.4 C, -2.1 C from the station mean1963: 19.5 C, -1.0 C from the station mean1964: 20.2 C, -0.3 C from the station mean1965: 19.8 C, -0.7 C from the station mean1966: 21.0 C, +0.5 C from the station mean1967: 21.3 C, +0.8 C from the station mean1968: 20.0 C, -0.5 C from the station mean1969: 20.6 C, +0.1 C from the station mean1970: 20.6 C, +0.1 C from the station mean1971: 21.6 C, +1.1 C from the station mean1972: 23.8 C, +3.3 C from the station mean1975: 20.0 C, -0.5 C from the station mean1978: 20.7 C, +0.2 C from the station mean1979: 20.1 C, -0.4 C from the station mean1981: 20.1 C, -0.4 C from the station mean1983: 20.5 C, 0.0 C from the station mean19461950195519601965197019751980
One stripe for each of 27 complete years at Atengo (Smn), 1946 to 1983. Blue stripes are years cooler than the station's own mean of 20.5 C (68.9 F); red stripes are warmer. The coolest year was 1961, at 18.4 C (65.0 F), and the warmest was 1972, at 23.8 C (74.8 F). The strongest colour marks a difference of 3.3 C (5.9 F).
Annual mean temperature at Atengo (Smn) as warming stripes, 1946 to 1983
YearAnnual mean temperatureDifference from the station mean
194620.4 C-0.05 C
194720.5 C-0.01 C
195020.3 C-0.23 C
195219.6 C-0.86 C
195319.5 C-0.94 C
195521.5 C+0.98 C
195623.6 C+3.10 C
195721.6 C+1.08 C
195819.7 C-0.79 C
195919.0 C-1.51 C
196019.5 C-0.98 C
196118.4 C-2.13 C
196319.5 C-0.99 C
196420.2 C-0.25 C
196519.8 C-0.65 C
196621.0 C+0.48 C
196721.3 C+0.77 C
196820.0 C-0.46 C
196920.6 C+0.11 C
197020.6 C+0.08 C
197121.6 C+1.15 C
197223.8 C+3.27 C
197520.0 C-0.52 C
197820.7 C+0.20 C
197920.1 C-0.41 C
198120.1 C-0.36 C
198320.5 C+0.01 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

1945 to 1991
Yearly extremes at Atengo (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)197236.7 C (98.1 F)45
Coldest night (TNn)-12.2 C (10.0 F)19902.2 C (36.0 F)45
Wettest day (Rx1day)97.8 mm (3.9 in)197949.8 mm (2.0 in)45
Wettest five days (Rx5day)163.9 mm (6.5 in)1955102.6 mm (4.0 in)45
Longest dry spell (CDD)170 days197076 days45

Hottest day (TXx)

Hottest day (TXx) at Atengo (Smn) by year The hottest day of the year at Atengo (Smn), 1945 to 1991. The record is 44.4 C (111.9 F) in 1972, marked on the chart; the median year is 36.7 C (98.1 F). 253035404519501960197019801990Record: 44.4 C (111.9 F) in 1972
The hottest day of the year at Atengo (Smn), 1945 to 1991. The record is 44.4 C (111.9 F) in 1972, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Atengo (Smn) by year
YearHottest day (TXx)
194528.3 C (82.9 F)
194633.3 C (91.9 F)
194731.7 C (89.1 F)
194829.4 C (84.9 F)
194929.4 C (84.9 F)
195029.4 C (84.9 F)
195127.2 C (81.0 F)
195226.7 C (80.1 F)
195329.4 C (84.9 F)
195432.8 C (91.0 F)
195535.6 C (96.1 F)
195639.4 C (102.9 F)
195738.9 C (102.0 F)
195835.0 C (95.0 F)
195932.2 C (90.0 F)
196033.9 C (93.0 F)
196131.7 C (89.1 F)
196230.6 C (87.1 F)
196334.4 C (93.9 F)
196436.7 C (98.1 F)
196537.8 C (100.0 F)
196637.8 C (100.0 F)
196737.8 C (100.0 F)
196838.9 C (102.0 F)
196940.6 C (105.1 F)
197039.4 C (102.9 F)
197142.8 C (109.0 F)
197244.4 C (111.9 F)
197339.4 C (102.9 F)
197438.9 C (102.0 F)
197536.7 C (98.1 F)
197636.1 C (97.0 F)
197735.6 C (96.1 F)
197836.1 C (97.0 F)
197934.4 C (93.9 F)
198038.3 C (100.9 F)
198137.2 C (99.0 F)
198238.3 C (100.9 F)
198338.9 C (102.0 F)
198430.6 C (87.1 F)
198738.9 C (102.0 F)
198838.9 C (102.0 F)
198938.9 C (102.0 F)
199040.0 C (104.0 F)
199140.0 C (104.0 F)

Coldest night (TNn)

Coldest night (TNn) at Atengo (Smn) by year The coldest night of the year at Atengo (Smn), 1945 to 1991. The record is -12.2 C (10.0 F) in 1990, marked on the chart; the median year is 2.2 C (36.0 F). -20-100102019501960197019801990Record: -12.2 C (10.0 F) in 1990
The coldest night of the year at Atengo (Smn), 1945 to 1991. The record is -12.2 C (10.0 F) in 1990, marked on the chart; the median year is 2.2 C (36.0 F).
Coldest night (TNn) at Atengo (Smn) by year
YearColdest night (TNn)
19456.7 C (44.1 F)
19466.1 C (43.0 F)
19477.8 C (46.0 F)
194810.0 C (50.0 F)
194910.0 C (50.0 F)
195011.7 C (53.1 F)
19517.8 C (46.0 F)
19528.9 C (48.0 F)
195310.0 C (50.0 F)
195411.7 C (53.1 F)
195510.6 C (51.1 F)
19567.2 C (45.0 F)
19572.8 C (37.0 F)
19585.6 C (42.1 F)
19595.0 C (41.0 F)
19605.0 C (41.0 F)
19615.0 C (41.0 F)
19621.1 C (34.0 F)
19630.6 C (33.1 F)
19643.3 C (37.9 F)
19651.1 C (34.0 F)
19662.8 C (37.0 F)
19671.7 C (35.1 F)
19683.9 C (39.0 F)
19695.6 C (42.1 F)
19702.8 C (37.0 F)
19710.6 C (33.1 F)
19720.0 C (32.0 F)
19731.7 C (35.1 F)
19741.7 C (35.1 F)
1975-6.1 C (21.0 F)
19760.6 C (33.1 F)
19771.7 C (35.1 F)
19782.2 C (36.0 F)
1979-0.6 C (30.9 F)
19800.6 C (33.1 F)
19810.6 C (33.1 F)
19820.6 C (33.1 F)
19830.0 C (32.0 F)
19841.7 C (35.1 F)
19870.0 C (32.0 F)
1988-8.3 C (17.1 F)
1989-10.0 C (14.0 F)
1990-12.2 C (10.0 F)
1991-9.4 C (15.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Atengo (Smn) by year The wettest day of the year at Atengo (Smn), 1945 to 1991. The record is 97.8 mm (3.9 in) in 1979, marked on the chart; the median year is 49.8 mm (2.0 in). 025507510019501960197019801990Record: 97.8 mm (3.9 in) in 1979
The wettest day of the year at Atengo (Smn), 1945 to 1991. The record is 97.8 mm (3.9 in) in 1979, marked on the chart; the median year is 49.8 mm (2.0 in).
Wettest day (Rx1day) at Atengo (Smn) by year
YearWettest day (Rx1day)
194534.8 mm (1.4 in)
194650.8 mm (2.0 in)
194736.3 mm (1.4 in)
194854.9 mm (2.2 in)
194937.8 mm (1.5 in)
195042.9 mm (1.7 in)
195131.8 mm (1.3 in)
195227.9 mm (1.1 in)
195363.0 mm (2.5 in)
195464.8 mm (2.6 in)
195565.3 mm (2.6 in)
195643.9 mm (1.7 in)
195742.9 mm (1.7 in)
195885.9 mm (3.4 in)
195952.8 mm (2.1 in)
196028.4 mm (1.1 in)
196155.9 mm (2.2 in)
196262.0 mm (2.4 in)
196366.8 mm (2.6 in)
196449.8 mm (2.0 in)
196562.0 mm (2.4 in)
196657.9 mm (2.3 in)
196779.8 mm (3.1 in)
196849.8 mm (2.0 in)
196927.9 mm (1.1 in)
197039.9 mm (1.6 in)
197134.8 mm (1.4 in)
197223.9 mm (0.9 in)
197315.7 mm (0.6 in)
197447.0 mm (1.9 in)
197559.9 mm (2.4 in)
197682.8 mm (3.3 in)
197755.4 mm (2.2 in)
197864.8 mm (2.6 in)
197997.8 mm (3.9 in)
198048.8 mm (1.9 in)
198188.9 mm (3.5 in)
198259.9 mm (2.4 in)
198355.9 mm (2.2 in)
198418.8 mm (0.7 in)
19875.6 mm (0.22 in)
198828.4 mm (1.1 in)
198924.4 mm (1.0 in)
199039.1 mm (1.5 in)
19910.0 mm (0.00 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Atengo (Smn) by year The wettest five days of the year at Atengo (Smn), 1945 to 1991. The record is 163.9 mm (6.5 in) in 1955, marked on the chart; the median year is 102.6 mm (4.0 in). 05010015020019501960197019801990Record: 163.9 mm (6.5 in) in 1955
The wettest five days of the year at Atengo (Smn), 1945 to 1991. The record is 163.9 mm (6.5 in) in 1955, marked on the chart; the median year is 102.6 mm (4.0 in).
Wettest five days (Rx5day) at Atengo (Smn) by year
YearWettest five days (Rx5day)
194572.7 mm (2.9 in)
1946102.6 mm (4.0 in)
194753.9 mm (2.1 in)
1948104.7 mm (4.1 in)
1949100.8 mm (4.0 in)
195078.0 mm (3.1 in)
195199.8 mm (3.9 in)
195263.2 mm (2.5 in)
1953113.0 mm (4.4 in)
1954107.4 mm (4.2 in)
1955163.9 mm (6.5 in)
1956113.3 mm (4.5 in)
195783.7 mm (3.3 in)
1958115.3 mm (4.5 in)
1959100.9 mm (4.0 in)
196043.2 mm (1.7 in)
1961106.0 mm (4.2 in)
1962103.7 mm (4.1 in)
1963128.7 mm (5.1 in)
1964109.4 mm (4.3 in)
1965100.3 mm (3.9 in)
1966124.5 mm (4.9 in)
1967161.1 mm (6.3 in)
1968159.6 mm (6.3 in)
196936.6 mm (1.4 in)
1970140.5 mm (5.5 in)
1971115.6 mm (4.6 in)
197283.9 mm (3.3 in)
197365.0 mm (2.6 in)
1974130.4 mm (5.1 in)
1975146.0 mm (5.7 in)
1976159.7 mm (6.3 in)
197795.1 mm (3.7 in)
1978135.6 mm (5.3 in)
1979119.4 mm (4.7 in)
1980116.6 mm (4.6 in)
1981111.9 mm (4.4 in)
198281.2 mm (3.2 in)
198398.4 mm (3.9 in)
198422.6 mm (0.9 in)
19875.6 mm (0.22 in)
198867.8 mm (2.7 in)
198980.5 mm (3.2 in)
199068.6 mm (2.7 in)
19910.0 mm (0.00 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Atengo (Smn) by year The longest dry spell of the year at Atengo (Smn), 1945 to 1991. The record is 170 days in 1970, marked on the chart; the median year is 76 days. 05010015020019501960197019801990Record: 170 days in 1970
The longest dry spell of the year at Atengo (Smn), 1945 to 1991. The record is 170 days in 1970, marked on the chart; the median year is 76 days.
Longest dry spell (CDD) at Atengo (Smn) by year
YearLongest dry spell (CDD)
194579 days
194687 days
1947143 days
1948110 days
194969 days
1950151 days
195175 days
195287 days
195356 days
195464 days
1955106 days
1956112 days
1957127 days
195858 days
195990 days
1960119 days
196196 days
196269 days
196370 days
196439 days
196573 days
196633 days
196767 days
196839 days
1969166 days
1970170 days
197178 days
197276 days
197396 days
197490 days
1975119 days
1976103 days
1977129 days
197854 days
197971 days
198059 days
198135 days
198258 days
198374 days
198430 days
198737 days
198885 days
1989111 days
199040 days
199130 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

35 years, 1946 to 1988

A day with at least 52.1 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 104.4 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Atengo (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years52.1 mm (2.1 in)
5 years69.0 mm (2.7 in)
10 years78.9 mm (3.1 in)
25 years90.1 mm (3.5 in)
50 years97.6 mm (3.8 in)Longer than the 35 years of record
100 years104.4 mm (4.1 in)Longer than the 35 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, 35 years of values from 1946 to 1988.

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: 97.8 mm (3.9 in) in 1979; 88.9 mm (3.5 in) in 1981; 85.9 mm (3.4 in) in 1958.

Download the Data

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