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San Pedro Chenalho (Smn) Weather Records (MXN00007033)

Record envelope, standing records and threshold days for San Pedro Chenalho (Smn) (MXN00007033), Mexico, with 54 years of record.

Key Facts for San Pedro Chenalho (Smn)

  • San Pedro Chenalho (Smn) (MXN00007033) is a weather station in Mexico at 16.90 latitude and -92.60 longitude, 1,520 m (4,986 ft) above sea level.
  • The station reports from 1939 to 1992, 54 years of record.
  • 1,464 records set at San Pedro Chenalho (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Pedro Chenalho (Smn) set a daily record precipitation of 27.9 mm (1.1 in) on 23 November 1991.

About the Station

  • Location: Mexico, 16.90 latitude, -92.60 longitude.
  • Elevation: 1,520 m (4,986 ft).
  • Period of record: 1939 to 1992, 54 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at San Pedro Chenalho (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at San Pedro Chenalho (Smn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Pedro Chenalho (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 San Pedro Chenalho (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan31.7 C (89.1 F)0.0 C (32.0 F)n/an/a
Feb41.7 C (107.1 F)0.0 C (32.0 F)n/an/a
Mar36.1 C (97.0 F)0.0 C (32.0 F)n/an/a
Apr37.2 C (99.0 F)0.0 C (32.0 F)n/an/a
May42.2 C (108.0 F)1.7 C (35.1 F)n/an/a
Jun32.8 C (91.0 F)1.7 C (35.1 F)n/an/a
Jul30.0 C (86.0 F)1.7 C (35.1 F)n/an/a
Aug31.7 C (89.1 F)5.6 C (42.1 F)n/an/a
Sep31.1 C (88.0 F)3.9 C (39.0 F)n/an/a
Oct30.0 C (86.0 F)0.6 C (33.1 F)n/an/a
Nov28.9 C (84.0 F)0.0 C (32.0 F)n/an/a
Dec28.9 C (84.0 F)0.0 C (32.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Pedro Chenalho (Smn) by the year they were set 1,464 records at San Pedro Chenalho (Smn) still stand. 1940 holds the most, with 227. 01002003001939: 691940: 2271941: 601942: 821945: 61946: 871947: 1421948: 901949: 71950: 61951: 41953: 51954: 391955: 1111956: 371957: 261958: 341959: 131961: 11962: 41963: 11964: 21965: 31966: 71967: 521968: 331969: 531970: 221971: 251972: 301973: 511974: 111975: 31976: 101977: 111978: 91979: 151980: 181981: 61982: 21983: 81984: 71985: 41986: 81987: 61988: 81989: 41990: 31991: 21939194619511957196319681973197819831988
1,464 records at San Pedro Chenalho (Smn) still stand. 1940 holds the most, with 227.
Standing records at San Pedro Chenalho (Smn) by the year they were set
Year setStanding records
193969
1940227
194160
194282
19456
194687
1947142
194890
19497
19506
19514
19535
195439
1955111
195637
195726
195834
195913
19611
19624
19631
19642
19653
19667
196752
196833
196953
197022
197125
197230
197351
197411
19753
197610
197711
19789
197915
198018
19816
19822
19838
19847
19854
19868
19876
19888
19894
19903
19912

All-Time Record Progression

1 new records
When San Pedro Chenalho (Smn) set new all-time records 1 all-time records were set at San Pedro Chenalho (Smn) between 3 May 1978 and 3 May 1978. Each dot is a new record. Record high maximum temperature3 May 1978: Record high maximum temperature 42.2 C (108.0 F)
1 all-time records were set at San Pedro Chenalho (Smn) between 3 May 1978 and 3 May 1978. Each dot is a new record.
When San Pedro Chenalho (Smn) set new all-time records
DateKindDetail
1978-05-03Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)

Wettest Day of Each Month

Apr: 149.9 mm (5.9 in)
Record daily precipitation for each month at San Pedro Chenalho (Smn) The wettest day on record for each calendar month at San Pedro Chenalho (Smn). The most was 149.9 mm (5.9 in) on 3 April 1967. 050100150 Jan: 65.8 mm (2.6 in), 12 January 1968 Jan Feb: 74.9 mm (2.9 in), 4 February 1990 Feb Mar: 129.8 mm (5.1 in), 6 March 1967 Mar Apr: 149.9 mm (5.9 in), 3 April 1967 Apr May: 89.9 mm (3.5 in), 22 May 1967 May Jun: 106.9 mm (4.2 in), 14 June 1968 Jun Jul: 99.6 mm (3.9 in), 12 July 1983 Jul Aug: 87.4 mm (3.4 in), 3 August 1970 Aug Sep: 100.1 mm (3.9 in), 9 September 1990 Sep Oct: 99.8 mm (3.9 in), 7 October 1952 Oct Nov: 90.4 mm (3.6 in), 9 November 1971 Nov Dec: 79.8 mm (3.1 in), 21 December 1960 Dec
The wettest day on record for each calendar month at San Pedro Chenalho (Smn). The most was 149.9 mm (5.9 in) on 3 April 1967.
Record daily precipitation for each month at San Pedro Chenalho (Smn)
MonthRecord daily precipitation (mm)Date
Jan65.8 mm (2.6 in)12 January 1968
Feb74.9 mm (2.9 in)4 February 1990
Mar129.8 mm (5.1 in)6 March 1967
Apr149.9 mm (5.9 in)3 April 1967
May89.9 mm (3.5 in)22 May 1967
Jun106.9 mm (4.2 in)14 June 1968
Jul99.6 mm (3.9 in)12 July 1983
Aug87.4 mm (3.4 in)3 August 1970
Sep100.1 mm (3.9 in)9 September 1990
Oct99.8 mm (3.9 in)7 October 1952
Nov90.4 mm (3.6 in)9 November 1971
Dec79.8 mm (3.1 in)21 December 1960

Period of Record Coverage

1939 to 1992
Days with data per year at San Pedro Chenalho (Smn) 52 years of record at San Pedro Chenalho (Smn), 1939 to 1992. 14 years have data for under 90 percent of days and are left out of rankings: 1939, 1941, 1945, 1947, 1954, 1963, 1977, 1978 and others. 1939: 92 of 365 days1940: 334 of 366 days1941: 244 of 365 days1942: 334 of 365 days1945: 92 of 365 days1946: 363 of 365 days1947: 243 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 364 of 365 days1951: 365 of 365 days1952: 365 of 366 days1953: 363 of 365 days1954: 298 of 365 days1955: 359 of 365 days1956: 365 of 366 days1957: 364 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 365 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 304 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 363 of 365 days1967: 364 of 365 days1968: 364 of 366 days1969: 355 of 365 days1970: 358 of 365 days1971: 360 of 365 days1972: 356 of 366 days1973: 354 of 365 days1974: 353 of 365 days1975: 357 of 365 days1976: 360 of 366 days1977: 294 of 365 days1978: 158 of 365 days1979: 349 of 365 days1980: 360 of 366 days1981: 356 of 365 days1982: 358 of 365 days1983: 359 of 365 days1984: 354 of 366 days1985: 358 of 365 days1986: 329 of 365 days1987: 264 of 365 days1988: 321 of 366 days1989: 146 of 365 days1990: 325 of 365 days1991: 263 of 365 days1992: 87 of 366 days194019501960197019801990
52 years of record at San Pedro Chenalho (Smn), 1939 to 1992. 14 years have data for under 90 percent of days and are left out of rankings: 1939, 1941, 1945, 1947, 1954, 1963, 1977, 1978 and others.
Days with data per year at San Pedro Chenalho (Smn)
YearDays with dataShare of yearComplete
19399225%No
194033491%Yes
194124467%No
194233492%Yes
19459225%No
194636399%Yes
194724367%No
1948366100%Yes
1949365100%Yes
1950364100%Yes
1951365100%Yes
1952365100%Yes
195336399%Yes
195429882%No
195535998%Yes
1956365100%Yes
1957364100%Yes
1958364100%Yes
1959365100%Yes
1960365100%Yes
1961365100%Yes
1962365100%Yes
196330483%No
1964366100%Yes
1965365100%Yes
196636399%Yes
1967364100%Yes
196836499%Yes
196935597%Yes
197035898%Yes
197136099%Yes
197235697%Yes
197335497%Yes
197435397%Yes
197535798%Yes
197636098%Yes
197729481%No
197815843%No
197934996%Yes
198036098%Yes
198135698%Yes
198235898%Yes
198335998%Yes
198435497%Yes
198535898%Yes
198632990%Yes
198726472%No
198832188%No
198914640%No
199032589%No
199126372%No
19928724%No

Latest Records

20
Latest records at San Pedro Chenalho (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
23 November 1991San Pedro Chenalho (Smn), MXdaily rain27.9 mm (1.1 in)12.4 mm (0.5 in)18 years20 of 100 (Routine)
13 November 1991San Pedro Chenalho (Smn), MXdaily low max (Tie)12.8 C (55.0 F)tie48 years4 of 100 (Routine)
28 June 1991San Pedro Chenalho (Smn), MXdaily rain51.8 mm (2.0 in)6.3 mm (0.25 in)2 years9 of 100 (Routine)
19 June 1991San Pedro Chenalho (Smn), MXdaily high max (Tie)26.1 C (79.0 F)tie40 years4 of 100 (Routine)
8 June 1991San Pedro Chenalho (Smn), MXdaily rain57.9 mm (2.3 in)13.4 mm (0.5 in)36 years25 of 100 (Routine)
27 April 1991San Pedro Chenalho (Smn), MXdaily high max (Tie)32.2 C (90.0 F)tie21 years2 of 100 (Routine)
9 April 1991San Pedro Chenalho (Smn), MXdaily rain18.8 mm (0.7 in)0.5 mm (0.02 in)18 years10 of 100 (Routine)
14 February 1991San Pedro Chenalho (Smn), MXdaily low min1.7 C (35.1 F)1.1 C (2.0 F)16 years13 of 100 (Routine)
1 February 1991San Pedro Chenalho (Smn), MXdaily rain15.0 mm (0.6 in)3.1 mm (0.12 in)40 years20 of 100 (Routine)
4 January 1991San Pedro Chenalho (Smn), MXdaily high max26.7 C (80.1 F)0.6 C (1.1 F)40 years18 of 100 (Routine)
31 December 1990San Pedro Chenalho (Smn), MXdaily rain62.0 mm (2.4 in)24.2 mm (1.0 in)32 years40 of 100 (Notable)
3 December 1990San Pedro Chenalho (Smn), MXdaily rain47.8 mm (1.9 in)29.0 mm (1.1 in)44 years50 of 100 (Notable)
15 November 1990San Pedro Chenalho (Smn), MXdaily rain14.0 mm (0.6 in)0.5 mm (0.02 in)17 years10 of 100 (Routine)
14 November 1990San Pedro Chenalho (Smn), MXdaily rain25.9 mm (1.0 in)2.0 mm (0.08 in)36 years16 of 100 (Routine)
3 October 1990San Pedro Chenalho (Smn), MXdaily rain75.4 mm (3.0 in)5.5 mm (0.22 in)28 years17 of 100 (Routine)
29 September 1990San Pedro Chenalho (Smn), MXdaily rain83.6 mm (3.3 in)23.7 mm (0.9 in)24 years27 of 100 (Routine)
27 September 1990San Pedro Chenalho (Smn), MXdaily rain59.9 mm (2.4 in)17.0 mm (0.7 in)41 years28 of 100 (Routine)
16 September 1990San Pedro Chenalho (Smn), MXdaily rain80.5 mm (3.2 in)35.8 mm (1.4 in)5 years30 of 100 (Routine)
15 September 1990San Pedro Chenalho (Smn), MXdaily rain50.3 mm (2.0 in)10.4 mm (0.4 in)39 years22 of 100 (Routine)
14 September 1990San Pedro Chenalho (Smn), MXdaily rain66.5 mm (2.6 in)26.6 mm (1.0 in)24 years29 of 100 (Routine)

Climate Trend

33 complete years, 1946 to 1985
Annual mean temperature at San Pedro Chenalho (Smn) as warming stripes, 1946 to 1985 One stripe for each of 33 complete years at San Pedro Chenalho (Smn), 1946 to 1985. Blue stripes are years cooler than the station's own mean of 17.0 C (62.5 F); red stripes are warmer. The coolest year was 1955, at 13.8 C (56.8 F), and the warmest was 1946, at 19.9 C (67.7 F). The strongest colour marks a difference of 3.2 C (5.8 F). 1946: 19.9 C, +2.9 C from the station mean1948: 19.8 C, +2.9 C from the station mean1949: 17.8 C, +0.8 C from the station mean1950: 19.0 C, +2.0 C from the station mean1951: 18.8 C, +1.9 C from the station mean1952: 18.3 C, +1.3 C from the station mean1953: 15.7 C, -1.2 C from the station mean1955: 13.8 C, -3.2 C from the station mean1956: 14.6 C, -2.4 C from the station mean1957: 15.5 C, -1.5 C from the station mean1958: 13.9 C, -3.0 C from the station mean1960: 15.9 C, -1.1 C from the station mean1961: 15.8 C, -1.2 C from the station mean1962: 15.1 C, -1.9 C from the station mean1964: 15.1 C, -1.9 C from the station mean1965: 15.0 C, -2.0 C from the station mean1966: 14.8 C, -2.1 C from the station mean1967: 17.4 C, +0.5 C from the station mean1968: 17.7 C, +0.8 C from the station mean1969: 18.6 C, +1.6 C from the station mean1970: 17.7 C, +0.8 C from the station mean1971: 17.4 C, +0.5 C from the station mean1972: 18.1 C, +1.1 C from the station mean1973: 17.7 C, +0.7 C from the station mean1974: 16.8 C, -0.1 C from the station mean1975: 17.4 C, +0.5 C from the station mean1976: 17.1 C, +0.2 C from the station mean1979: 17.9 C, +0.9 C from the station mean1981: 18.1 C, +1.1 C from the station mean1982: 17.5 C, +0.6 C from the station mean1983: 17.7 C, +0.7 C from the station mean1984: 16.9 C, 0.0 C from the station mean1985: 16.8 C, -0.2 C from the station mean194619501955196019651970197519801985
One stripe for each of 33 complete years at San Pedro Chenalho (Smn), 1946 to 1985. Blue stripes are years cooler than the station's own mean of 17.0 C (62.5 F); red stripes are warmer. The coolest year was 1955, at 13.8 C (56.8 F), and the warmest was 1946, at 19.9 C (67.7 F). The strongest colour marks a difference of 3.2 C (5.8 F).
Annual mean temperature at San Pedro Chenalho (Smn) as warming stripes, 1946 to 1985
YearAnnual mean temperatureDifference from the station mean
194619.9 C+2.90 C
194819.8 C+2.86 C
194917.8 C+0.84 C
195019.0 C+2.01 C
195118.8 C+1.87 C
195218.3 C+1.33 C
195315.7 C-1.23 C
195513.8 C-3.17 C
195614.6 C-2.39 C
195715.5 C-1.50 C
195813.9 C-3.02 C
196015.9 C-1.06 C
196115.8 C-1.16 C
196215.1 C-1.86 C
196415.1 C-1.87 C
196515.0 C-1.95 C
196614.8 C-2.11 C
196717.4 C+0.46 C
196817.7 C+0.78 C
196918.6 C+1.60 C
197017.7 C+0.78 C
197117.4 C+0.49 C
197218.1 C+1.14 C
197317.7 C+0.71 C
197416.8 C-0.13 C
197517.4 C+0.49 C
197617.1 C+0.18 C
197917.9 C+0.92 C
198118.1 C+1.12 C
198217.5 C+0.56 C
198317.7 C+0.74 C
198416.9 C-0.02 C
198516.8 C-0.15 C

The fitted trend in annual mean temperature here over 1946 to 1985 is 0.03 C (-0.48 to 0.53) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.05 F (-0.86 to 0.96) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Pedro Chenalho (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.03 C (-0.48 to 0.53) per decade0.05 F (-0.86 to 0.96) per decade1946 to 198533Not clearly different from zero
Mean daily maximum0.7 C (-0.3 to 1.7) per decade1.3 F (-0.5 to 3.0) per decade1946 to 198533Not clearly different from zero
Mean daily minimum-0.6 C (-0.9 to -0.4) per decade-1.2 F (-1.7 to -0.6) per decade1946 to 198533Fall

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

1939 to 1992
Yearly extremes at San Pedro Chenalho (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.2 C (108.0 F)197830.0 C (86.0 F)52
Coldest night (TNn)0.0 C (32.0 F)19393.3 C (37.9 F)52
Wettest day (Rx1day)149.9 mm (5.9 in)196764.8 mm (2.6 in)52
Wettest five days (Rx5day)349.6 mm (13.8 in)1967149.2 mm (5.9 in)52
Longest dry spell (CDD)61 days194924 days52

Hottest day (TXx)

Hottest day (TXx) at San Pedro Chenalho (Smn) by year The hottest day of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 42.2 C (108.0 F) in 1978, marked on the chart; the median year is 30.0 C (86.0 F). 1020304050194019501960197019801990Record: 42.2 C (108.0 F) in 1978
The hottest day of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 42.2 C (108.0 F) in 1978, marked on the chart; the median year is 30.0 C (86.0 F).
Hottest day (TXx) at San Pedro Chenalho (Smn) by year
YearHottest day (TXx)
193926.7 C (80.1 F)
194041.7 C (107.1 F)
194130.6 C (87.1 F)
194232.8 C (91.0 F)
194526.7 C (80.1 F)
194626.7 C (80.1 F)
194727.8 C (82.0 F)
194830.0 C (86.0 F)
194930.6 C (87.1 F)
195028.9 C (84.0 F)
195127.8 C (82.0 F)
195227.8 C (82.0 F)
195325.6 C (78.1 F)
195420.6 C (69.1 F)
195519.4 C (66.9 F)
195625.0 C (77.0 F)
195725.6 C (78.1 F)
195818.9 C (66.0 F)
195920.0 C (68.0 F)
196021.1 C (70.0 F)
196120.6 C (69.1 F)
196220.6 C (69.1 F)
196320.0 C (68.0 F)
196420.6 C (69.1 F)
196521.7 C (71.1 F)
196620.6 C (69.1 F)
196733.3 C (91.9 F)
196831.7 C (89.1 F)
196934.4 C (93.9 F)
197033.3 C (91.9 F)
197133.3 C (91.9 F)
197232.2 C (90.0 F)
197337.2 C (99.0 F)
197435.0 C (95.0 F)
197531.1 C (88.0 F)
197630.0 C (86.0 F)
197733.3 C (91.9 F)
197842.2 C (108.0 F)
197931.7 C (89.1 F)
198032.2 C (90.0 F)
198130.0 C (86.0 F)
198230.0 C (86.0 F)
198332.2 C (90.0 F)
198432.2 C (90.0 F)
198530.0 C (86.0 F)
198631.1 C (88.0 F)
198731.1 C (88.0 F)
198832.8 C (91.0 F)
198924.4 C (75.9 F)
199030.0 C (86.0 F)
199132.2 C (90.0 F)
199227.8 C (82.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Pedro Chenalho (Smn) by year The coldest night of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 0.0 C (32.0 F) in 1939, marked on the chart; the median year is 3.3 C (37.9 F). 051015194019501960197019801990Record: 0.0 C (32.0 F) in 1939
The coldest night of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 0.0 C (32.0 F) in 1939, marked on the chart; the median year is 3.3 C (37.9 F).
Coldest night (TNn) at San Pedro Chenalho (Smn) by year
YearColdest night (TNn)
19390.0 C (32.0 F)
19400.0 C (32.0 F)
19413.9 C (39.0 F)
19420.0 C (32.0 F)
194511.1 C (52.0 F)
194612.8 C (55.0 F)
194712.8 C (55.0 F)
19488.9 C (48.0 F)
19498.9 C (48.0 F)
195010.0 C (50.0 F)
19518.9 C (48.0 F)
19528.9 C (48.0 F)
19539.4 C (48.9 F)
195410.0 C (50.0 F)
195510.0 C (50.0 F)
195610.0 C (50.0 F)
195710.0 C (50.0 F)
195810.0 C (50.0 F)
195910.0 C (50.0 F)
19605.0 C (41.0 F)
196110.0 C (50.0 F)
19620.6 C (33.1 F)
196310.0 C (50.0 F)
196410.0 C (50.0 F)
196510.0 C (50.0 F)
196610.0 C (50.0 F)
19670.0 C (32.0 F)
19680.0 C (32.0 F)
19692.8 C (37.0 F)
19703.3 C (37.9 F)
19711.1 C (34.0 F)
19720.0 C (32.0 F)
19730.0 C (32.0 F)
19740.0 C (32.0 F)
19753.3 C (37.9 F)
19760.6 C (33.1 F)
19771.7 C (35.1 F)
19781.7 C (35.1 F)
19793.3 C (37.9 F)
19800.0 C (32.0 F)
19812.8 C (37.0 F)
19822.8 C (37.0 F)
19832.2 C (36.0 F)
19842.8 C (37.0 F)
19853.3 C (37.9 F)
19861.1 C (34.0 F)
19870.0 C (32.0 F)
19882.8 C (37.0 F)
19890.0 C (32.0 F)
19905.0 C (41.0 F)
19911.1 C (34.0 F)
19925.0 C (41.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Pedro Chenalho (Smn) by year The wettest day of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 149.9 mm (5.9 in) in 1967, marked on the chart; the median year is 64.8 mm (2.6 in). 050100150194019501960197019801990Record: 149.9 mm (5.9 in) in 1967
The wettest day of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 149.9 mm (5.9 in) in 1967, marked on the chart; the median year is 64.8 mm (2.6 in).
Wettest day (Rx1day) at San Pedro Chenalho (Smn) by year
YearWettest day (Rx1day)
193924.9 mm (1.0 in)
194039.9 mm (1.6 in)
194164.8 mm (2.6 in)
194285.9 mm (3.4 in)
194581.8 mm (3.2 in)
194648.8 mm (1.9 in)
194750.8 mm (2.0 in)
194852.1 mm (2.1 in)
194956.9 mm (2.2 in)
195049.8 mm (2.0 in)
195159.9 mm (2.4 in)
195299.8 mm (3.9 in)
195374.9 mm (2.9 in)
195469.9 mm (2.8 in)
195563.8 mm (2.5 in)
195671.4 mm (2.8 in)
195779.8 mm (3.1 in)
195859.9 mm (2.4 in)
195983.8 mm (3.3 in)
196079.8 mm (3.1 in)
196172.9 mm (2.9 in)
196259.9 mm (2.4 in)
196349.8 mm (2.0 in)
196454.9 mm (2.2 in)
196564.8 mm (2.6 in)
196699.8 mm (3.9 in)
1967149.9 mm (5.9 in)
1968106.9 mm (4.2 in)
196995.3 mm (3.8 in)
197087.4 mm (3.4 in)
197190.4 mm (3.6 in)
197238.4 mm (1.5 in)
197369.3 mm (2.7 in)
197499.6 mm (3.9 in)
197581.5 mm (3.2 in)
197642.4 mm (1.7 in)
197748.8 mm (1.9 in)
197842.7 mm (1.7 in)
197959.9 mm (2.4 in)
198049.0 mm (1.9 in)
198148.3 mm (1.9 in)
198249.3 mm (1.9 in)
198399.6 mm (3.9 in)
198470.1 mm (2.8 in)
198550.8 mm (2.0 in)
198674.9 mm (2.9 in)
198782.6 mm (3.3 in)
198873.9 mm (2.9 in)
198934.0 mm (1.3 in)
1990100.1 mm (3.9 in)
199157.9 mm (2.3 in)
199219.8 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Pedro Chenalho (Smn) by year The wettest five days of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 349.6 mm (13.8 in) in 1967, marked on the chart; the median year is 149.2 mm (5.9 in). 0100200300400194019501960197019801990Record: 349.6 mm (13.8 in) in 1967
The wettest five days of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 349.6 mm (13.8 in) in 1967, marked on the chart; the median year is 149.2 mm (5.9 in).
Wettest five days (Rx5day) at San Pedro Chenalho (Smn) by year
YearWettest five days (Rx5day)
193951.3 mm (2.0 in)
1940150.4 mm (5.9 in)
1941119.3 mm (4.7 in)
1942167.0 mm (6.6 in)
1945132.9 mm (5.2 in)
1946149.1 mm (5.9 in)
1947115.6 mm (4.6 in)
1948111.8 mm (4.4 in)
1949153.0 mm (6.0 in)
1950140.5 mm (5.5 in)
1951179.5 mm (7.1 in)
1952236.5 mm (9.3 in)
1953160.3 mm (6.3 in)
1954161.2 mm (6.3 in)
1955158.5 mm (6.2 in)
1956156.8 mm (6.2 in)
1957173.6 mm (6.8 in)
1958149.3 mm (5.9 in)
1959154.7 mm (6.1 in)
1960159.6 mm (6.3 in)
1961160.3 mm (6.3 in)
1962139.5 mm (5.5 in)
1963125.2 mm (4.9 in)
1964144.5 mm (5.7 in)
1965136.7 mm (5.4 in)
1966229.6 mm (9.0 in)
1967349.6 mm (13.8 in)
1968254.5 mm (10.0 in)
1969232.3 mm (9.1 in)
1970163.5 mm (6.4 in)
1971132.1 mm (5.2 in)
1972121.3 mm (4.8 in)
1973248.2 mm (9.8 in)
1974160.1 mm (6.3 in)
1975170.4 mm (6.7 in)
1976144.1 mm (5.7 in)
1977147.9 mm (5.8 in)
1978102.1 mm (4.0 in)
1979117.2 mm (4.6 in)
1980125.2 mm (4.9 in)
1981122.8 mm (4.8 in)
1982142.2 mm (5.6 in)
1983257.5 mm (10.1 in)
1984203.7 mm (8.0 in)
1985165.3 mm (6.5 in)
1986124.2 mm (4.9 in)
1987124.7 mm (4.9 in)
1988147.3 mm (5.8 in)
198960.9 mm (2.4 in)
1990281.4 mm (11.1 in)
1991106.7 mm (4.2 in)
199246.3 mm (1.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Pedro Chenalho (Smn) by year The longest dry spell of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 61 days in 1949, marked on the chart; the median year is 24 days. 020406080194019501960197019801990Record: 61 days in 1949
The longest dry spell of the year at San Pedro Chenalho (Smn), 1939 to 1992. The record is 61 days in 1949, marked on the chart; the median year is 24 days.
Longest dry spell (CDD) at San Pedro Chenalho (Smn) by year
YearLongest dry spell (CDD)
193922 days
194028 days
194116 days
194227 days
19455 days
194634 days
194722 days
194821 days
194961 days
195020 days
195125 days
195258 days
195341 days
195413 days
195527 days
195637 days
195729 days
195830 days
195927 days
196058 days
196124 days
196233 days
196322 days
196430 days
196527 days
196615 days
196736 days
196817 days
196928 days
197036 days
197136 days
197214 days
197314 days
197415 days
197516 days
197629 days
197734 days
19789 days
197917 days
198015 days
198119 days
198217 days
198331 days
198415 days
198524 days
198620 days
198731 days
198818 days
198912 days
199021 days
199128 days
199224 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

40 years, 1942 to 1990

A day with at least 69.9 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 140.6 mm (5.5 in) of rain is expected about once in 100 years.

Rainfall return levels at San Pedro Chenalho (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years69.9 mm (2.8 in)
5 years90.1 mm (3.5 in)
10 years102.9 mm (4.1 in)
25 years118.5 mm (4.7 in)
50 years129.7 mm (5.1 in)Longer than the 40 years of record
100 years140.6 mm (5.5 in)Longer than the 40 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, 40 years of values from 1942 to 1990.

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: 149.9 mm (5.9 in) in 1967; 106.9 mm (4.2 in) in 1968; 100.1 mm (3.9 in) in 1990.

Download the Data

  • Data for San Pedro Chenalho (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Pedro Chenalho (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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

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