Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

Hecelchakan (Smn) Weather Records (MXN00004043)

Record envelope, standing records and threshold days for Hecelchakan (Smn) (MXN00004043), Mexico, with 63 years of record.

Key Facts for Hecelchakan (Smn)

  • Hecelchakan (Smn) (MXN00004043) is a weather station in Mexico at 20.18 latitude and -90.12 longitude, 50 m (164 ft) above sea level.
  • The station reports from 1949 to 2011, 63 years of record.
  • 1,464 records set at Hecelchakan (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Hecelchakan (Smn) tied a daily record low maximum temperature of 30.0 C (86.0 F) on 11 October 2011.

About the Station

  • Location: Mexico, 20.18 latitude, -90.12 longitude.
  • Elevation: 50 m (164 ft).
  • Period of record: 1949 to 2011, 63 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 Hecelchakan (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Hecelchakan (Smn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 0102030405060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Hecelchakan (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 Hecelchakan (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan46.7 C (116.1 F)5.0 C (41.0 F)n/an/a
Feb45.6 C (114.1 F)5.0 C (41.0 F)n/an/a
Mar47.8 C (118.0 F)4.4 C (39.9 F)n/an/a
Apr50.6 C (123.1 F)8.3 C (46.9 F)n/an/a
May50.6 C (123.1 F)8.9 C (48.0 F)n/an/a
Jun50.0 C (122.0 F)12.8 C (55.0 F)n/an/a
Jul48.9 C (120.0 F)15.6 C (60.1 F)n/an/a
Aug47.8 C (118.0 F)17.8 C (64.0 F)n/an/a
Sep47.8 C (118.0 F)15.0 C (59.0 F)n/an/a
Oct46.7 C (116.1 F)7.8 C (46.0 F)n/an/a
Nov45.6 C (114.1 F)6.7 C (44.1 F)n/an/a
Dec45.0 C (113.0 F)7.2 C (45.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Hecelchakan (Smn) by the year they were set 1,464 records at Hecelchakan (Smn) still stand. 1967 holds the most, with 135. 0501001501949: 251950: 91951: 111952: 221953: 361954: 311955: 191958: 381959: 291960: 381961: 131962: 321963: 291964: 191965: 241966: 561967: 1351968: 1321969: 1281970: 251971: 1231972: 161973: 171974: 281975: 31976: 201977: 131978: 211979: 61980: 161981: 311982: 131983: 91984: 81985: 141986: 121987: 111988: 121989: 51990: 71991: 101992: 21993: 431994: 51995: 91996: 61997: 111998: 51999: 32000: 62001: 72002: 72003: 82004: 42005: 82006: 152007: 92008: 132009: 52010: 252011: 27194919581965197219791986199320002007
1,464 records at Hecelchakan (Smn) still stand. 1967 holds the most, with 135.
Standing records at Hecelchakan (Smn) by the year they were set
Year setStanding records
194925
19509
195111
195222
195336
195431
195519
195838
195929
196038
196113
196232
196329
196419
196524
196656
1967135
1968132
1969128
197025
1971123
197216
197317
197428
19753
197620
197713
197821
19796
198016
198131
198213
19839
19848
198514
198612
198711
198812
19895
19907
199110
19922
199343
19945
19959
19966
199711
19985
19993
20006
20017
20027
20038
20044
20058
200615
20079
200813
20095
201025
201127

All-Time Record Progression

1 new records
When Hecelchakan (Smn) set new all-time records 1 all-time records were set at Hecelchakan (Smn) between 14 September 1988 and 14 September 1988. Each dot is a new record. Record daily precipitation14 September 1988: Record daily precipitation 250.4 mm (9.9 in)
1 all-time records were set at Hecelchakan (Smn) between 14 September 1988 and 14 September 1988. Each dot is a new record.
When Hecelchakan (Smn) set new all-time records
DateKindDetail
1988-09-14Record daily precipitationRecord daily precipitation 250.4 mm (9.9 in)

Wettest Day of Each Month

Sep: 250.4 mm (9.9 in)
Record daily precipitation for each month at Hecelchakan (Smn) The wettest day on record for each calendar month at Hecelchakan (Smn). The most was 250.4 mm (9.9 in) on 14 September 1988. 0100200300 Jan: 95.0 mm (3.7 in), 2 January 1988 Jan Feb: 57.9 mm (2.3 in), 11 February 2008 Feb Mar: 74.9 mm (2.9 in), 31 March 1969 Mar Apr: 95.0 mm (3.7 in), 1 April 2005 Apr May: 95.0 mm (3.7 in), 16 May 2010 May Jun: 104.9 mm (4.1 in), 27 June 1987 Jun Jul: 125.0 mm (4.9 in), 14 July 1952 Jul Aug: 117.9 mm (4.6 in), 7 August 2008 Aug Sep: 250.4 mm (9.9 in), 14 September 1988 Sep Oct: 121.9 mm (4.8 in), 22 October 2005 Oct Nov: 70.9 mm (2.8 in), 23 November 1997 Nov Dec: 53.8 mm (2.1 in), 5 December 2002 Dec
The wettest day on record for each calendar month at Hecelchakan (Smn). The most was 250.4 mm (9.9 in) on 14 September 1988.
Record daily precipitation for each month at Hecelchakan (Smn)
MonthRecord daily precipitation (mm)Date
Jan95.0 mm (3.7 in)2 January 1988
Feb57.9 mm (2.3 in)11 February 2008
Mar74.9 mm (2.9 in)31 March 1969
Apr95.0 mm (3.7 in)1 April 2005
May95.0 mm (3.7 in)16 May 2010
Jun104.9 mm (4.1 in)27 June 1987
Jul125.0 mm (4.9 in)14 July 1952
Aug117.9 mm (4.6 in)7 August 2008
Sep250.4 mm (9.9 in)14 September 1988
Oct121.9 mm (4.8 in)22 October 2005
Nov70.9 mm (2.8 in)23 November 1997
Dec53.8 mm (2.1 in)5 December 2002

Period of Record Coverage

1949 to 2011
Days with data per year at Hecelchakan (Smn) 61 years of record at Hecelchakan (Smn), 1949 to 2011. 10 years have data for under 90 percent of days and are left out of rankings: 1967, 1973, 1974, 1975, 1981, 1982, 1988, 1991 and others. 1949: 353 of 365 days1950: 349 of 365 days1951: 365 of 365 days1952: 335 of 366 days1953: 365 of 365 days1954: 354 of 365 days1955: 365 of 365 days1958: 360 of 365 days1959: 335 of 365 days1960: 335 of 366 days1961: 365 of 365 days1962: 364 of 365 days1963: 364 of 365 days1964: 365 of 366 days1965: 364 of 365 days1966: 364 of 365 days1967: 307 of 365 days1968: 338 of 366 days1969: 340 of 365 days1970: 365 of 365 days1971: 363 of 365 days1972: 334 of 366 days1973: 181 of 365 days1974: 120 of 365 days1975: 61 of 365 days1976: 365 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 335 of 366 days1981: 243 of 365 days1982: 243 of 365 days1983: 365 of 365 days1984: 336 of 366 days1985: 365 of 365 days1986: 335 of 365 days1987: 365 of 365 days1988: 305 of 366 days1989: 364 of 365 days1990: 334 of 365 days1991: 304 of 365 days1992: 213 of 366 days1993: 365 of 365 days1994: 243 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 364 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 363 of 366 days2009: 363 of 365 days2010: 365 of 365 days2011: 362 of 365 days1950196019701980199020002010
61 years of record at Hecelchakan (Smn), 1949 to 2011. 10 years have data for under 90 percent of days and are left out of rankings: 1967, 1973, 1974, 1975, 1981, 1982, 1988, 1991 and others.
Days with data per year at Hecelchakan (Smn)
YearDays with dataShare of yearComplete
194935397%Yes
195034996%Yes
1951365100%Yes
195233592%Yes
1953365100%Yes
195435497%Yes
1955365100%Yes
195836099%Yes
195933592%Yes
196033592%Yes
1961365100%Yes
1962364100%Yes
1963364100%Yes
1964365100%Yes
1965364100%Yes
1966364100%Yes
196730784%No
196833892%Yes
196934093%Yes
1970365100%Yes
197136399%Yes
197233491%Yes
197318150%No
197412033%No
19756117%No
1976365100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
198033592%Yes
198124367%No
198224367%No
1983365100%Yes
198433692%Yes
1985365100%Yes
198633592%Yes
1987365100%Yes
198830583%No
1989364100%Yes
199033492%Yes
199130483%No
199221358%No
1993365100%Yes
199424367%No
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003364100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
200836399%Yes
200936399%Yes
2010365100%Yes
201136299%Yes

Latest Records

20
Latest records at Hecelchakan (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
11 October 2011Hecelchakan (Smn), MXdaily low max (Tie)30.0 C (86.0 F)tie60 years6 of 100 (Routine)
9 October 2011Hecelchakan (Smn), MXdaily high min25.6 C (78.1 F)1.7 C (3.1 F)58 years29 of 100 (Routine)
30 September 2011Hecelchakan (Smn), MXdaily low min17.8 C (64.0 F)1.1 C (2.0 F)45 years26 of 100 (Routine)
29 September 2011Hecelchakan (Smn), MXdaily low min16.7 C (62.1 F)1.1 C (2.0 F)28 years21 of 100 (Routine)
24 September 2011Hecelchakan (Smn), MXdaily low min16.7 C (62.1 F)2.2 C (4.0 F)24 years27 of 100 (Routine)
20 September 2011Hecelchakan (Smn), MXdaily low min17.8 C (64.0 F)1.1 C (2.0 F)13 years17 of 100 (Routine)
19 September 2011Hecelchakan (Smn), MXdaily low min15.6 C (60.1 F)3.3 C (5.9 F)10 years30 of 100 (Routine)
18 September 2011Hecelchakan (Smn), MXdaily low min17.8 C (64.0 F)0.5 C (0.9 F)40 years21 of 100 (Routine)
13 September 2011Hecelchakan (Smn), MXdaily low min (Tie)18.9 C (66.0 F)tie24 years3 of 100 (Routine)
12 September 2011Hecelchakan (Smn), MXdaily low max30.0 C (86.0 F)0.6 C (1.1 F)58 years25 of 100 (Routine)
10 September 2011Hecelchakan (Smn), MXdaily low max (Tie)30.0 C (86.0 F)tie40 years4 of 100 (Routine)
8 September 2011Hecelchakan (Smn), MXdaily low min17.8 C (64.0 F)1.1 C (2.0 F)20 years19 of 100 (Routine)
7 September 2011Hecelchakan (Smn), MXdaily low min16.7 C (62.1 F)2.2 C (4.0 F)20 years26 of 100 (Routine)
6 September 2011Hecelchakan (Smn), MXdaily low min17.8 C (64.0 F)2.2 C (4.0 F)45 years33 of 100 (Routine)
5 September 2011Hecelchakan (Smn), MXdaily low min18.9 C (66.0 F)1.1 C (2.0 F)38 years24 of 100 (Routine)
4 September 2011Hecelchakan (Smn), MXdaily high min (Tie)23.9 C (75.0 F)tie56 years5 of 100 (Routine)
28 August 2011Hecelchakan (Smn), MXdaily high min (Tie)23.9 C (75.0 F)tie61 years6 of 100 (Routine)
22 August 2011Hecelchakan (Smn), MXdaily low min (Tie)18.9 C (66.0 F)tie44 years4 of 100 (Routine)
13 August 2011Hecelchakan (Smn), MXdaily high min (Tie)23.9 C (75.0 F)tie60 years6 of 100 (Routine)
2 August 2011Hecelchakan (Smn), MXdaily low min18.9 C (66.0 F)1.1 C (2.0 F)33 years22 of 100 (Routine)

Climate Trend

41 complete years, 1949 to 2011
Annual mean temperature at Hecelchakan (Smn) as warming stripes, 1949 to 2011 One stripe for each of 41 complete years at Hecelchakan (Smn), 1949 to 2011. Blue stripes are years cooler than the station's own mean of 26.8 C (80.3 F); red stripes are warmer. The coolest year was 1971, at 24.9 C (76.7 F), and the warmest was 1968, at 31.0 C (87.7 F). The strongest colour marks a difference of 4.2 C (7.6 F). 1949: 27.7 C, +0.9 C from the station mean1951: 27.6 C, +0.7 C from the station mean1953: 26.8 C, 0.0 C from the station mean1954: 25.5 C, -1.3 C from the station mean1955: 26.2 C, -0.7 C from the station mean1958: 26.3 C, -0.5 C from the station mean1961: 26.9 C, 0.0 C from the station mean1962: 25.9 C, -0.9 C from the station mean1963: 26.8 C, 0.0 C from the station mean1964: 26.3 C, -0.5 C from the station mean1965: 27.6 C, +0.8 C from the station mean1966: 27.8 C, +1.0 C from the station mean1968: 31.0 C, +4.1 C from the station mean1969: 28.7 C, +1.9 C from the station mean1970: 25.3 C, -1.6 C from the station mean1971: 24.9 C, -2.0 C from the station mean1976: 25.9 C, -1.0 C from the station mean1977: 26.2 C, -0.6 C from the station mean1978: 26.2 C, -0.6 C from the station mean1979: 26.5 C, -0.3 C from the station mean1983: 28.5 C, +1.6 C from the station mean1985: 28.1 C, +1.3 C from the station mean1987: 25.7 C, -1.1 C from the station mean1993: 25.5 C, -1.3 C from the station mean1995: 26.9 C, 0.0 C from the station mean1996: 26.8 C, -0.1 C from the station mean1997: 26.4 C, -0.4 C from the station mean1998: 27.4 C, +0.6 C from the station mean1999: 26.5 C, -0.3 C from the station mean2000: 26.6 C, -0.2 C from the station mean2001: 27.3 C, +0.4 C from the station mean2002: 27.1 C, +0.2 C from the station mean2003: 26.7 C, -0.1 C from the station mean2004: 26.7 C, -0.2 C from the station mean2005: 26.7 C, -0.2 C from the station mean2006: 27.0 C, +0.1 C from the station mean2007: 27.1 C, +0.2 C from the station mean2008: 27.0 C, +0.2 C from the station mean2009: 27.9 C, +1.0 C from the station mean2010: 25.7 C, -1.1 C from the station mean2011: 26.7 C, -0.1 C from the station mean1949196019701980199020002010
One stripe for each of 41 complete years at Hecelchakan (Smn), 1949 to 2011. Blue stripes are years cooler than the station's own mean of 26.8 C (80.3 F); red stripes are warmer. The coolest year was 1971, at 24.9 C (76.7 F), and the warmest was 1968, at 31.0 C (87.7 F). The strongest colour marks a difference of 4.2 C (7.6 F).
Annual mean temperature at Hecelchakan (Smn) as warming stripes, 1949 to 2011
YearAnnual mean temperatureDifference from the station mean
194927.7 C+0.86 C
195127.6 C+0.72 C
195326.8 C-0.04 C
195425.5 C-1.31 C
195526.2 C-0.67 C
195826.3 C-0.49 C
196126.9 C+0.04 C
196225.9 C-0.92 C
196326.8 C+0.01 C
196426.3 C-0.54 C
196527.6 C+0.79 C
196627.8 C+1.00 C
196831.0 C+4.14 C
196928.7 C+1.89 C
197025.3 C-1.58 C
197124.9 C-1.97 C
197625.9 C-0.98 C
197726.2 C-0.63 C
197826.2 C-0.64 C
197926.5 C-0.32 C
198328.5 C+1.62 C
198528.1 C+1.31 C
198725.7 C-1.09 C
199325.5 C-1.35 C
199526.9 C+0.03 C
199626.8 C-0.07 C
199726.4 C-0.44 C
199827.4 C+0.57 C
199926.5 C-0.34 C
200026.6 C-0.20 C
200127.3 C+0.42 C
200227.1 C+0.23 C
200326.7 C-0.09 C
200426.7 C-0.18 C
200526.7 C-0.17 C
200627.0 C+0.12 C
200727.1 C+0.24 C
200827.0 C+0.19 C
200927.9 C+1.04 C
201025.7 C-1.12 C
201126.7 C-0.12 C

The fitted trend in annual mean temperature here over 1949 to 2011 is -0.02 C (-0.19 to 0.16) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.03 F (-0.35 to 0.28) 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 Hecelchakan (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.02 C (-0.19 to 0.16) per decade-0.03 F (-0.35 to 0.28) per decade1949 to 201141Not clearly different from zero
Mean daily maximum0.1 C (-0.2 to 0.4) per decade0.2 F (-0.4 to 0.8) per decade1949 to 201141Not clearly different from zero
Mean daily minimum-0.2 C (-0.3 to -0.1) per decade-0.3 F (-0.5 to -0.1) per decade1949 to 201141Fall

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

1949 to 2011
Yearly extremes at Hecelchakan (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)50.6 C (123.1 F)196741.1 C (106.0 F)61
Coldest night (TNn)4.4 C (39.9 F)19708.9 C (48.0 F)61
Wettest day (Rx1day)250.4 mm (9.9 in)198881.8 mm (3.2 in)61
Wettest five days (Rx5day)444.6 mm (17.5 in)2002149.1 mm (5.9 in)61
Longest dry spell (CDD)113 days198642 days61

Hottest day (TXx)

Hottest day (TXx) at Hecelchakan (Smn) by year The hottest day of the year at Hecelchakan (Smn), 1949 to 2011. The record is 50.6 C (123.1 F) in 1967, marked on the chart; the median year is 41.1 C (106.0 F). 303540455055196019802000Record: 50.6 C (123.1 F) in 1967
The hottest day of the year at Hecelchakan (Smn), 1949 to 2011. The record is 50.6 C (123.1 F) in 1967, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Hecelchakan (Smn) by year
YearHottest day (TXx)
194940.0 C (104.0 F)
195040.6 C (105.1 F)
195141.7 C (107.1 F)
195241.7 C (107.1 F)
195342.8 C (109.0 F)
195436.7 C (98.1 F)
195537.8 C (100.0 F)
195840.0 C (104.0 F)
195938.9 C (102.0 F)
196040.0 C (104.0 F)
196141.7 C (107.1 F)
196240.6 C (105.1 F)
196340.0 C (104.0 F)
196443.9 C (111.0 F)
196550.0 C (122.0 F)
196646.7 C (116.1 F)
196750.6 C (123.1 F)
196850.0 C (122.0 F)
196950.6 C (123.1 F)
197040.0 C (104.0 F)
197142.2 C (108.0 F)
197238.9 C (102.0 F)
197342.2 C (108.0 F)
197439.4 C (102.9 F)
197532.8 C (91.0 F)
197640.0 C (104.0 F)
197739.4 C (102.9 F)
197843.3 C (109.9 F)
197941.7 C (107.1 F)
198041.7 C (107.1 F)
198140.6 C (105.1 F)
198240.6 C (105.1 F)
198343.9 C (111.0 F)
198441.1 C (106.0 F)
198542.8 C (109.0 F)
198641.1 C (106.0 F)
198740.0 C (104.0 F)
198840.0 C (104.0 F)
198938.9 C (102.0 F)
199038.9 C (102.0 F)
199140.0 C (104.0 F)
199237.8 C (100.0 F)
199338.9 C (102.0 F)
199440.0 C (104.0 F)
199540.6 C (105.1 F)
199640.0 C (104.0 F)
199740.0 C (104.0 F)
199841.7 C (107.1 F)
199941.7 C (107.1 F)
200040.0 C (104.0 F)
200142.8 C (109.0 F)
200241.7 C (107.1 F)
200341.7 C (107.1 F)
200441.1 C (106.0 F)
200542.8 C (109.0 F)
200643.9 C (111.0 F)
200740.6 C (105.1 F)
200842.8 C (109.0 F)
200945.0 C (113.0 F)
201042.8 C (109.0 F)
201141.7 C (107.1 F)

Coldest night (TNn)

Coldest night (TNn) at Hecelchakan (Smn) by year The coldest night of the year at Hecelchakan (Smn), 1949 to 2011. The record is 4.4 C (39.9 F) in 1970, marked on the chart; the median year is 8.9 C (48.0 F). 051015196019802000Record: 4.4 C (39.9 F) in 1970
The coldest night of the year at Hecelchakan (Smn), 1949 to 2011. The record is 4.4 C (39.9 F) in 1970, marked on the chart; the median year is 8.9 C (48.0 F).
Coldest night (TNn) at Hecelchakan (Smn) by year
YearColdest night (TNn)
194911.7 C (53.1 F)
195012.8 C (55.0 F)
195110.6 C (51.1 F)
195212.8 C (55.0 F)
195311.7 C (53.1 F)
19547.8 C (46.0 F)
19557.8 C (46.0 F)
19588.9 C (48.0 F)
19598.9 C (48.0 F)
19607.8 C (46.0 F)
196110.0 C (50.0 F)
19628.9 C (48.0 F)
19639.4 C (48.9 F)
196410.0 C (50.0 F)
196510.0 C (50.0 F)
196610.0 C (50.0 F)
196710.0 C (50.0 F)
19688.9 C (48.0 F)
19697.8 C (46.0 F)
19704.4 C (39.9 F)
19715.6 C (42.1 F)
19725.0 C (41.0 F)
19735.0 C (41.0 F)
197415.0 C (59.0 F)
197510.0 C (50.0 F)
19766.1 C (43.0 F)
19776.1 C (43.0 F)
19786.1 C (43.0 F)
197910.0 C (50.0 F)
19806.1 C (43.0 F)
19817.8 C (46.0 F)
198210.0 C (50.0 F)
19838.9 C (48.0 F)
198410.0 C (50.0 F)
19857.8 C (46.0 F)
19866.1 C (43.0 F)
19877.8 C (46.0 F)
19887.8 C (46.0 F)
19897.8 C (46.0 F)
199011.7 C (53.1 F)
199110.0 C (50.0 F)
199211.7 C (53.1 F)
19938.9 C (48.0 F)
19947.8 C (46.0 F)
199510.0 C (50.0 F)
19967.8 C (46.0 F)
199710.6 C (51.1 F)
19988.9 C (48.0 F)
19997.8 C (46.0 F)
200010.0 C (50.0 F)
20018.9 C (48.0 F)
20027.8 C (46.0 F)
20038.9 C (48.0 F)
200410.6 C (51.1 F)
200510.0 C (50.0 F)
20066.7 C (44.1 F)
20075.6 C (42.1 F)
20088.9 C (48.0 F)
20097.8 C (46.0 F)
20105.0 C (41.0 F)
201110.0 C (50.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Hecelchakan (Smn) by year The wettest day of the year at Hecelchakan (Smn), 1949 to 2011. The record is 250.4 mm (9.9 in) in 1988, marked on the chart; the median year is 81.8 mm (3.2 in). 0100200300196019802000Record: 250.4 mm (9.9 in) in 1988
The wettest day of the year at Hecelchakan (Smn), 1949 to 2011. The record is 250.4 mm (9.9 in) in 1988, marked on the chart; the median year is 81.8 mm (3.2 in).
Wettest day (Rx1day) at Hecelchakan (Smn) by year
YearWettest day (Rx1day)
194966.8 mm (2.6 in)
195083.8 mm (3.3 in)
195168.8 mm (2.7 in)
1952125.0 mm (4.9 in)
1953102.9 mm (4.1 in)
195484.8 mm (3.3 in)
195574.9 mm (2.9 in)
195893.0 mm (3.7 in)
195979.8 mm (3.1 in)
196093.0 mm (3.7 in)
196121.8 mm (0.9 in)
196293.0 mm (3.7 in)
196359.9 mm (2.4 in)
196480.8 mm (3.2 in)
196584.8 mm (3.3 in)
196689.9 mm (3.5 in)
196774.9 mm (2.9 in)
196879.8 mm (3.1 in)
1969125.0 mm (4.9 in)
197090.9 mm (3.6 in)
197163.5 mm (2.5 in)
197290.4 mm (3.6 in)
1973110.0 mm (4.3 in)
1974104.9 mm (4.1 in)
197584.8 mm (3.3 in)
197672.9 mm (2.9 in)
197753.3 mm (2.1 in)
197881.8 mm (3.2 in)
197961.0 mm (2.4 in)
198057.2 mm (2.3 in)
198146.0 mm (1.8 in)
198299.3 mm (3.9 in)
198365.0 mm (2.6 in)
198490.2 mm (3.6 in)
198564.3 mm (2.5 in)
198664.8 mm (2.6 in)
1987104.9 mm (4.1 in)
1988250.4 mm (9.9 in)
198959.9 mm (2.4 in)
199059.9 mm (2.4 in)
199163.0 mm (2.5 in)
199291.9 mm (3.6 in)
199374.2 mm (2.9 in)
199452.8 mm (2.1 in)
1995103.4 mm (4.1 in)
199640.9 mm (1.6 in)
199789.9 mm (3.5 in)
199863.8 mm (2.5 in)
199964.8 mm (2.6 in)
200089.9 mm (3.5 in)
200172.9 mm (2.9 in)
2002125.0 mm (4.9 in)
200385.9 mm (3.4 in)
200475.9 mm (3.0 in)
2005121.9 mm (4.8 in)
200681.8 mm (3.2 in)
200790.9 mm (3.6 in)
2008117.9 mm (4.6 in)
200974.9 mm (2.9 in)
201095.0 mm (3.7 in)
201190.9 mm (3.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Hecelchakan (Smn) by year The wettest five days of the year at Hecelchakan (Smn), 1949 to 2011. The record is 444.6 mm (17.5 in) in 2002, marked on the chart; the median year is 149.1 mm (5.9 in). 0200400600196019802000Record: 444.6 mm (17.5 in) in 2002
The wettest five days of the year at Hecelchakan (Smn), 1949 to 2011. The record is 444.6 mm (17.5 in) in 2002, marked on the chart; the median year is 149.1 mm (5.9 in).
Wettest five days (Rx5day) at Hecelchakan (Smn) by year
YearWettest five days (Rx5day)
1949154.7 mm (6.1 in)
1950186.2 mm (7.3 in)
1951108.4 mm (4.3 in)
1952189.3 mm (7.5 in)
1953212.7 mm (8.4 in)
1954157.5 mm (6.2 in)
1955198.4 mm (7.8 in)
1958239.5 mm (9.4 in)
1959142.3 mm (5.6 in)
1960234.7 mm (9.2 in)
196121.8 mm (0.9 in)
1962166.7 mm (6.6 in)
1963159.5 mm (6.3 in)
1964151.5 mm (6.0 in)
1965162.5 mm (6.4 in)
1966252.3 mm (9.9 in)
1967104.9 mm (4.1 in)
196896.5 mm (3.8 in)
1969324.3 mm (12.8 in)
1970166.6 mm (6.6 in)
197173.4 mm (2.9 in)
1972176.3 mm (6.9 in)
1973179.6 mm (7.1 in)
1974265.7 mm (10.5 in)
1975159.2 mm (6.3 in)
1976113.8 mm (4.5 in)
197799.9 mm (3.9 in)
1978157.2 mm (6.2 in)
197981.8 mm (3.2 in)
1980110.5 mm (4.4 in)
198194.8 mm (3.7 in)
1982118.4 mm (4.7 in)
1983101.9 mm (4.0 in)
1984149.1 mm (5.9 in)
1985142.7 mm (5.6 in)
1986127.3 mm (5.0 in)
1987132.7 mm (5.2 in)
1988286.5 mm (11.3 in)
1989191.8 mm (7.6 in)
1990126.1 mm (5.0 in)
1991123.7 mm (4.9 in)
1992115.5 mm (4.5 in)
1993183.6 mm (7.2 in)
1994108.0 mm (4.3 in)
1995244.3 mm (9.6 in)
199681.8 mm (3.2 in)
1997138.4 mm (5.4 in)
1998103.3 mm (4.1 in)
1999167.4 mm (6.6 in)
2000164.9 mm (6.5 in)
2001124.6 mm (4.9 in)
2002444.6 mm (17.5 in)
2003140.2 mm (5.5 in)
2004134.4 mm (5.3 in)
2005179.1 mm (7.1 in)
2006137.2 mm (5.4 in)
2007128.1 mm (5.0 in)
2008235.3 mm (9.3 in)
2009148.4 mm (5.8 in)
2010231.3 mm (9.1 in)
201194.7 mm (3.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Hecelchakan (Smn) by year The longest dry spell of the year at Hecelchakan (Smn), 1949 to 2011. The record is 113 days in 1986, marked on the chart; the median year is 42 days. 0255075100125196019802000Record: 113 days in 1986
The longest dry spell of the year at Hecelchakan (Smn), 1949 to 2011. The record is 113 days in 1986, marked on the chart; the median year is 42 days.
Longest dry spell (CDD) at Hecelchakan (Smn) by year
YearLongest dry spell (CDD)
194953 days
195022 days
195135 days
195223 days
195331 days
195429 days
195527 days
195835 days
195931 days
196026 days
196152 days
196249 days
196354 days
196422 days
196532 days
196633 days
196743 days
196846 days
196975 days
197019 days
197143 days
197240 days
197335 days
197442 days
197521 days
197638 days
197731 days
197831 days
197927 days
198040 days
198147 days
198225 days
198335 days
198439 days
198526 days
1986113 days
198738 days
198886 days
198945 days
199030 days
199171 days
199251 days
199343 days
199466 days
199544 days
199657 days
199741 days
199857 days
199995 days
200059 days
200168 days
200249 days
200356 days
200457 days
200590 days
200643 days
200732 days
200835 days
200958 days
201043 days
201179 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, 1954 to 2011

A day with at least 77.5 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 185.9 mm (7.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Hecelchakan (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years77.5 mm (3.1 in)
5 years103.5 mm (4.1 in)
10 years121.8 mm (4.8 in)
25 years146.4 mm (5.8 in)
50 years165.7 mm (6.5 in)Longer than the 43 years of record
100 years185.9 mm (7.3 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 1954 to 2011.

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: 250.4 mm (9.9 in) in 1988; 125.0 mm (4.9 in) in 1969; 125.0 mm (4.9 in) in 2002.

Download the Data

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