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Built 2026-10-19 (19 October 2026)

Coalcoman (Smn) Weather Records (MXN00016154)

Record envelope, standing records and threshold days for Coalcoman (Smn) (MXN00016154), Mexico, with 81 years of record.

Key Facts for Coalcoman (Smn)

  • Coalcoman (Smn) (MXN00016154) is a weather station in Mexico at 18.77 latitude and -103.15 longitude, 1,086 m (3,562 ft) above sea level.
  • The station reports from 1926 to 2006, 81 years of record.
  • 1,464 records set at Coalcoman (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Coalcoman (Smn) tied a daily record low minimum temperature of 5.6 C (42.1 F) on 24 December 2006.

About the Station

  • Location: Mexico, 18.77 latitude, -103.15 longitude.
  • Elevation: 1,086 m (3,562 ft).
  • Period of record: 1926 to 2006, 81 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 Coalcoman (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Coalcoman (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 Coalcoman (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 Coalcoman (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan38.9 C (102.0 F)0.0 C (32.0 F)n/an/a
Feb41.1 C (106.0 F)0.6 C (33.1 F)n/an/a
Mar42.8 C (109.0 F)1.7 C (35.1 F)n/an/a
Apr41.1 C (106.0 F)2.8 C (37.0 F)n/an/a
May41.1 C (106.0 F)0.6 C (33.1 F)n/an/a
Jun39.4 C (102.9 F)7.8 C (46.0 F)n/an/a
Jul38.3 C (100.9 F)8.9 C (48.0 F)n/an/a
Aug38.9 C (102.0 F)10.0 C (50.0 F)n/an/a
Sep37.8 C (100.0 F)10.0 C (50.0 F)n/an/a
Oct37.8 C (100.0 F)6.7 C (44.1 F)n/an/a
Nov38.9 C (102.0 F)2.8 C (37.0 F)n/an/a
Dec38.9 C (102.0 F)1.7 C (35.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Coalcoman (Smn) by the year they were set 1,464 records at Coalcoman (Smn) still stand. 2006 holds the most, with 170. 0501001502001926: 71927: 491937: 331938: 161939: 311940: 351941: 331942: 431943: 91944: 141945: 81946: 121947: 81948: 611949: 131950: 671951: 281952: 221953: 351954: 161955: 131956: 411957: 191958: 151959: 381960: 101961: 31962: 31963: 141964: 461965: 161966: 131967: 101968: 181969: 261970: 181971: 211972: 371973: 191974: 71975: 101976: 161977: 191978: 201979: 101980: 171981: 151982: 111983: 211984: 101985: 201986: 141987: 291988: 511989: 52000: 12005: 982006: 1701926194119471953195919651971197719831989
1,464 records at Coalcoman (Smn) still stand. 2006 holds the most, with 170.
Standing records at Coalcoman (Smn) by the year they were set
Year setStanding records
19267
192749
193733
193816
193931
194035
194133
194243
19439
194414
19458
194612
19478
194861
194913
195067
195128
195222
195335
195416
195513
195641
195719
195815
195938
196010
19613
19623
196314
196446
196516
196613
196710
196818
196926
197018
197121
197237
197319
19747
197510
197616
197719
197820
197910
198017
198115
198211
198321
198410
198520
198614
198729
198851
19895
20001
200598
2006170

All-Time Record Progression

2 new records
When Coalcoman (Smn) set new all-time records 2 all-time records were set at Coalcoman (Smn) between 6 August 1975 and 17 January 1981. Each dot is a new record. Record daily precipitationRecord low maximum temperature6 August 1975: Record daily precipitation 169.9 mm (6.7 in)17 January 1981: Record low maximum temperature 15.0 C (59.0 F)19751980
2 all-time records were set at Coalcoman (Smn) between 6 August 1975 and 17 January 1981. Each dot is a new record.
When Coalcoman (Smn) set new all-time records
DateKindDetail
1975-08-06Record daily precipitationRecord daily precipitation 169.9 mm (6.7 in)
1981-01-17Record low maximum temperatureRecord low maximum temperature 15.0 C (59.0 F)

Wettest Day of Each Month

Aug: 169.9 mm (6.7 in)
Record daily precipitation for each month at Coalcoman (Smn) The wettest day on record for each calendar month at Coalcoman (Smn). The most was 169.9 mm (6.7 in) on 6 August 1975. 050100150200 Jan: 70.9 mm (2.8 in), 4 January 1972 Jan Feb: 51.8 mm (2.0 in), 1 February 1964 Feb Mar: 69.9 mm (2.8 in), 3 March 1988 Mar Apr: 59.9 mm (2.4 in), 19 April 1952 Apr May: 64.8 mm (2.6 in), 27 May 1972 May Jun: 125.0 mm (4.9 in), 23 June 1966 Jun Jul: 91.9 mm (3.6 in), 9 July 1969 Jul Aug: 169.9 mm (6.7 in), 6 August 1975 Aug Sep: 150.9 mm (5.9 in), 19 September 1945 Sep Oct: 89.9 mm (3.5 in), 15 October 1974 Oct Nov: 79.8 mm (3.1 in), 2 November 1981 Nov Dec: 89.9 mm (3.5 in), 5 December 1956 Dec
The wettest day on record for each calendar month at Coalcoman (Smn). The most was 169.9 mm (6.7 in) on 6 August 1975.
Record daily precipitation for each month at Coalcoman (Smn)
MonthRecord daily precipitation (mm)Date
Jan70.9 mm (2.8 in)4 January 1972
Feb51.8 mm (2.0 in)1 February 1964
Mar69.9 mm (2.8 in)3 March 1988
Apr59.9 mm (2.4 in)19 April 1952
May64.8 mm (2.6 in)27 May 1972
Jun125.0 mm (4.9 in)23 June 1966
Jul91.9 mm (3.6 in)9 July 1969
Aug169.9 mm (6.7 in)6 August 1975
Sep150.9 mm (5.9 in)19 September 1945
Oct89.9 mm (3.5 in)15 October 1974
Nov79.8 mm (3.1 in)2 November 1981
Dec89.9 mm (3.5 in)5 December 1956

Period of Record Coverage

1926 to 2006
Days with data per year at Coalcoman (Smn) 60 years of record at Coalcoman (Smn), 1926 to 2006. 15 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1936, 1944, 1945, 1947, 1948, 1963 and others. 1926: 30 of 365 days1927: 87 of 365 days1936: 31 of 366 days1937: 361 of 365 days1938: 364 of 365 days1939: 363 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 363 of 365 days1943: 364 of 365 days1944: 240 of 366 days1945: 304 of 365 days1946: 365 of 365 days1947: 242 of 365 days1948: 275 of 366 days1949: 365 of 365 days1950: 363 of 365 days1951: 360 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 364 of 365 days1956: 365 of 366 days1957: 364 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 210 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 365 of 366 days1969: 344 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 301 of 365 days1976: 304 of 366 days1977: 331 of 365 days1978: 364 of 365 days1979: 363 of 365 days1980: 353 of 366 days1981: 300 of 365 days1982: 364 of 365 days1983: 359 of 365 days1984: 334 of 366 days1985: 363 of 365 days1986: 363 of 365 days1987: 362 of 365 days1988: 334 of 366 days1989: 90 of 365 days2000: 27 of 366 days2001: 59 of 365 days2005: 184 of 365 days2006: 365 of 365 days194019501960197019802000
60 years of record at Coalcoman (Smn), 1926 to 2006. 15 years have data for under 90 percent of days and are left out of rankings: 1926, 1927, 1936, 1944, 1945, 1947, 1948, 1963 and others.
Days with data per year at Coalcoman (Smn)
YearDays with dataShare of yearComplete
1926308%No
19278724%No
1936318%No
193736199%Yes
1938364100%Yes
193936399%Yes
1940366100%Yes
1941365100%Yes
194236399%Yes
1943364100%Yes
194424066%No
194530483%No
1946365100%Yes
194724266%No
194827575%No
1949365100%Yes
195036399%Yes
195136099%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955364100%Yes
1956365100%Yes
1957364100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
196321058%No
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968365100%Yes
196934494%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
197530182%No
197630483%No
197733191%Yes
1978364100%Yes
197936399%Yes
198035396%Yes
198130082%No
1982364100%Yes
198335998%Yes
198433491%Yes
198536399%Yes
198636399%Yes
198736299%Yes
198833491%Yes
19899025%No
2000277%No
20015916%No
200518450%No
2006365100%Yes

Latest Records

20
Latest records at Coalcoman (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
24 December 2006Coalcoman (Smn), MXdaily low min (Tie)5.6 C (42.1 F)tie0 years2 of 100 (Routine)
15 December 2006Coalcoman (Smn), MXdaily low min (Tie)5.6 C (42.1 F)tie23 years3 of 100 (Routine)
10 December 2006Coalcoman (Smn), MXdaily low min (Tie)6.7 C (44.1 F)tie0 years2 of 100 (Routine)
8 December 2006Coalcoman (Smn), MXdaily low min (Tie)5.6 C (42.1 F)tie0 years2 of 100 (Routine)
3 December 2006Coalcoman (Smn), MXdaily low min5.6 C (42.1 F)1.1 C (2.0 F)20 years17 of 100 (Routine)
30 November 2006Coalcoman (Smn), MXdaily low max (Tie)25.6 C (78.1 F)tie49 years5 of 100 (Routine)
27 November 2006Coalcoman (Smn), MXdaily low min (Tie)5.6 C (42.1 F)tie21 years3 of 100 (Routine)
22 November 2006Coalcoman (Smn), MXdaily low max (Tie)25.6 C (78.1 F)tie33 years4 of 100 (Routine)
21 November 2006Coalcoman (Smn), MXdaily low min (Tie)5.6 C (42.1 F)tie21 years3 of 100 (Routine)
17 November 2006Coalcoman (Smn), MXdaily low min (Tie)7.8 C (46.0 F)tie0 years2 of 100 (Routine)
13 November 2006Coalcoman (Smn), MXdaily low min (Tie)7.8 C (46.0 F)tie52 years5 of 100 (Routine)
12 November 2006Coalcoman (Smn), MXdaily low min6.7 C (44.1 F)1.1 C (2.0 F)51 years26 of 100 (Routine)
10 November 2006Coalcoman (Smn), MXdaily low min7.8 C (46.0 F)2.2 C (4.0 F)56 years31 of 100 (Routine)
9 November 2006Coalcoman (Smn), MXdaily low min6.7 C (44.1 F)3.3 C (5.9 F)56 years35 of 100 (Notable)
7 November 2006Coalcoman (Smn), MXdaily low min7.8 C (46.0 F)2.2 C (4.0 F)20 years20 of 100 (Routine)
7 November 2006Coalcoman (Smn), MXdaily low max (Tie)26.7 C (80.1 F)tie67 years7 of 100 (Routine)
6 November 2006Coalcoman (Smn), MXdaily low min7.8 C (46.0 F)2.8 C (5.0 F)56 years33 of 100 (Routine)
18 October 2006Coalcoman (Smn), MXdaily low max (Tie)25.6 C (78.1 F)tie0 years2 of 100 (Routine)
17 October 2006Coalcoman (Smn), MXdaily low min11.7 C (53.1 F)0.5 C (0.9 F)36 years20 of 100 (Routine)
16 October 2006Coalcoman (Smn), MXdaily low min (Tie)11.7 C (53.1 F)tie53 years6 of 100 (Routine)

Climate Trend

40 complete years, 1937 to 2006
Annual mean temperature at Coalcoman (Smn) as warming stripes, 1937 to 2006 One stripe for each of 40 complete years at Coalcoman (Smn), 1937 to 2006. Blue stripes are years cooler than the station's own mean of 23.2 C (73.7 F); red stripes are warmer. The coolest year was 2006, at 18.5 C (65.3 F), and the warmest was 1953, at 24.5 C (76.1 F). The strongest colour marks a difference of 4.7 C (8.5 F). 1937: 23.6 C, +0.5 C from the station mean1938: 22.9 C, -0.3 C from the station mean1939: 22.0 C, -1.1 C from the station mean1940: 22.9 C, -0.3 C from the station mean1941: 23.6 C, +0.4 C from the station mean1942: 23.8 C, +0.7 C from the station mean1943: 23.4 C, +0.3 C from the station mean1946: 23.9 C, +0.7 C from the station mean1949: 23.4 C, +0.3 C from the station mean1950: 24.0 C, +0.9 C from the station mean1951: 23.5 C, +0.4 C from the station mean1952: 23.8 C, +0.6 C from the station mean1953: 24.5 C, +1.3 C from the station mean1954: 24.4 C, +1.2 C from the station mean1955: 23.6 C, +0.5 C from the station mean1956: 23.6 C, +0.5 C from the station mean1957: 23.6 C, +0.4 C from the station mean1958: 23.6 C, +0.4 C from the station mean1959: 23.7 C, +0.5 C from the station mean1960: 23.4 C, +0.2 C from the station mean1961: 23.4 C, +0.3 C from the station mean1962: 23.0 C, -0.1 C from the station mean1964: 24.2 C, +1.1 C from the station mean1965: 23.7 C, +0.5 C from the station mean1966: 23.2 C, 0.0 C from the station mean1967: 23.1 C, 0.0 C from the station mean1968: 23.1 C, -0.1 C from the station mean1970: 23.4 C, +0.3 C from the station mean1971: 23.0 C, -0.1 C from the station mean1972: 24.0 C, +0.8 C from the station mean1973: 23.6 C, +0.4 C from the station mean1974: 23.3 C, +0.1 C from the station mean1978: 23.5 C, +0.4 C from the station mean1979: 23.7 C, +0.5 C from the station mean1982: 21.6 C, -1.6 C from the station mean1983: 20.8 C, -2.4 C from the station mean1985: 21.7 C, -1.4 C from the station mean1986: 21.7 C, -1.5 C from the station mean1987: 22.5 C, -0.7 C from the station mean2006: 18.5 C, -4.7 C from the station mean1937195019601970198019902000
One stripe for each of 40 complete years at Coalcoman (Smn), 1937 to 2006. Blue stripes are years cooler than the station's own mean of 23.2 C (73.7 F); red stripes are warmer. The coolest year was 2006, at 18.5 C (65.3 F), and the warmest was 1953, at 24.5 C (76.1 F). The strongest colour marks a difference of 4.7 C (8.5 F).
Annual mean temperature at Coalcoman (Smn) as warming stripes, 1937 to 2006
YearAnnual mean temperatureDifference from the station mean
193723.6 C+0.48 C
193822.9 C-0.30 C
193922.0 C-1.11 C
194022.9 C-0.29 C
194123.6 C+0.43 C
194223.8 C+0.67 C
194323.4 C+0.29 C
194623.9 C+0.72 C
194923.4 C+0.28 C
195024.0 C+0.88 C
195123.5 C+0.39 C
195223.8 C+0.62 C
195324.5 C+1.33 C
195424.4 C+1.24 C
195523.6 C+0.49 C
195623.6 C+0.49 C
195723.6 C+0.41 C
195823.6 C+0.41 C
195923.7 C+0.51 C
196023.4 C+0.25 C
196123.4 C+0.29 C
196223.0 C-0.12 C
196424.2 C+1.07 C
196523.7 C+0.53 C
196623.2 C+0.03 C
196723.1 C-0.02 C
196823.1 C-0.10 C
197023.4 C+0.28 C
197123.0 C-0.13 C
197224.0 C+0.80 C
197323.6 C+0.45 C
197423.3 C+0.14 C
197823.5 C+0.37 C
197923.7 C+0.55 C
198221.6 C-1.60 C
198320.8 C-2.35 C
198521.7 C-1.41 C
198621.7 C-1.47 C
198722.5 C-0.68 C
200618.5 C-4.66 C

The annual mean temperature here has fallen by 0.4 C (0.2 to 0.6) per decade over 1937 to 2006. In Fahrenheit: 0.7 F (0.4 to 1.0) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Coalcoman (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.4 C (-0.6 to -0.2) per decade-0.7 F (-1.0 to -0.4) per decade1937 to 200640Fall
Mean daily maximum-0.4 C (-0.5 to -0.2) per decade-0.7 F (-0.9 to -0.4) per decade1937 to 200640Fall
Mean daily minimum-0.4 C (-0.7 to -0.1) per decade-0.8 F (-1.3 to -0.3) per decade1937 to 200640Fall

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

1926 to 2006
Yearly extremes at Coalcoman (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.8 C (109.0 F)195638.3 C (100.9 F)60
Coldest night (TNn)0.0 C (32.0 F)19384.4 C (39.9 F)61
Wettest day (Rx1day)169.9 mm (6.7 in)197568.1 mm (2.7 in)60
Wettest five days (Rx5day)317.5 mm (12.5 in)1951139.9 mm (5.5 in)60
Longest dry spell (CDD)154 days198774 days60

Hottest day (TXx)

Hottest day (TXx) at Coalcoman (Smn) by year The hottest day of the year at Coalcoman (Smn), 1926 to 2006. The record is 42.8 C (109.0 F) in 1956, marked on the chart; the median year is 38.3 C (100.9 F). 25303540451940196019802000Record: 42.8 C (109.0 F) in 1956
The hottest day of the year at Coalcoman (Smn), 1926 to 2006. The record is 42.8 C (109.0 F) in 1956, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Coalcoman (Smn) by year
YearHottest day (TXx)
192631.1 C (88.0 F)
192726.1 C (79.0 F)
193633.9 C (93.0 F)
193741.1 C (106.0 F)
193838.3 C (100.9 F)
193938.9 C (102.0 F)
194037.8 C (100.0 F)
194139.4 C (102.9 F)
194241.1 C (106.0 F)
194340.0 C (104.0 F)
194441.1 C (106.0 F)
194538.9 C (102.0 F)
194640.0 C (104.0 F)
194738.9 C (102.0 F)
194838.9 C (102.0 F)
194938.9 C (102.0 F)
195038.9 C (102.0 F)
195138.9 C (102.0 F)
195238.9 C (102.0 F)
195340.0 C (104.0 F)
195439.4 C (102.9 F)
195538.3 C (100.9 F)
195642.8 C (109.0 F)
195738.3 C (100.9 F)
195837.8 C (100.0 F)
195938.9 C (102.0 F)
196038.3 C (100.9 F)
196138.9 C (102.0 F)
196237.8 C (100.0 F)
196337.8 C (100.0 F)
196440.0 C (104.0 F)
196537.8 C (100.0 F)
196637.2 C (99.0 F)
196736.7 C (98.1 F)
196839.4 C (102.9 F)
196938.3 C (100.9 F)
197038.3 C (100.9 F)
197138.3 C (100.9 F)
197238.9 C (102.0 F)
197338.3 C (100.9 F)
197438.9 C (102.0 F)
197537.8 C (100.0 F)
197637.8 C (100.0 F)
197737.8 C (100.0 F)
197838.3 C (100.9 F)
197938.9 C (102.0 F)
198039.4 C (102.9 F)
198137.8 C (100.0 F)
198238.9 C (102.0 F)
198336.7 C (98.1 F)
198438.9 C (102.0 F)
198538.9 C (102.0 F)
198637.8 C (100.0 F)
198738.3 C (100.9 F)
198840.0 C (104.0 F)
198933.9 C (93.0 F)
1997n/a
200031.1 C (88.0 F)
200135.0 C (95.0 F)
200531.7 C (89.1 F)
200633.9 C (93.0 F)

Coldest night (TNn)

Coldest night (TNn) at Coalcoman (Smn) by year The coldest night of the year at Coalcoman (Smn), 1926 to 2006. The record is 0.0 C (32.0 F) in 1938, marked on the chart; the median year is 4.4 C (39.9 F). 0510151940196019802000Record: 0.0 C (32.0 F) in 1938
The coldest night of the year at Coalcoman (Smn), 1926 to 2006. The record is 0.0 C (32.0 F) in 1938, marked on the chart; the median year is 4.4 C (39.9 F).
Coldest night (TNn) at Coalcoman (Smn) by year
YearColdest night (TNn)
19268.9 C (48.0 F)
19273.9 C (39.0 F)
19366.7 C (44.1 F)
19374.4 C (39.9 F)
19380.0 C (32.0 F)
19394.4 C (39.9 F)
19401.7 C (35.1 F)
19412.2 C (36.0 F)
19423.9 C (39.0 F)
19435.6 C (42.1 F)
19446.7 C (44.1 F)
19456.7 C (44.1 F)
19465.0 C (41.0 F)
19475.6 C (42.1 F)
194810.0 C (50.0 F)
19495.0 C (41.0 F)
19505.6 C (42.1 F)
19513.3 C (37.9 F)
19526.1 C (43.0 F)
19533.3 C (37.9 F)
19544.4 C (39.9 F)
19552.2 C (36.0 F)
19562.2 C (36.0 F)
19571.7 C (35.1 F)
19582.8 C (37.0 F)
19596.1 C (43.0 F)
19604.4 C (39.9 F)
19612.8 C (37.0 F)
19625.6 C (42.1 F)
19632.8 C (37.0 F)
19647.8 C (46.0 F)
19653.3 C (37.9 F)
19663.9 C (39.0 F)
19674.4 C (39.9 F)
19684.4 C (39.9 F)
19697.8 C (46.0 F)
19702.2 C (36.0 F)
19713.9 C (39.0 F)
19721.7 C (35.1 F)
19735.0 C (41.0 F)
19747.2 C (45.0 F)
19753.9 C (39.0 F)
19765.6 C (42.1 F)
19778.3 C (46.9 F)
19787.2 C (45.0 F)
19792.8 C (37.0 F)
19805.0 C (41.0 F)
19813.9 C (39.0 F)
19823.9 C (39.0 F)
19830.6 C (33.1 F)
19843.9 C (39.0 F)
19852.2 C (36.0 F)
19862.2 C (36.0 F)
19873.9 C (39.0 F)
19882.8 C (37.0 F)
198910.0 C (50.0 F)
199712.8 C (55.0 F)
20005.6 C (42.1 F)
20015.0 C (41.0 F)
20052.8 C (37.0 F)
20060.6 C (33.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Coalcoman (Smn) by year The wettest day of the year at Coalcoman (Smn), 1926 to 2006. The record is 169.9 mm (6.7 in) in 1975, marked on the chart; the median year is 68.1 mm (2.7 in). 0501001502001940196019802000Record: 169.9 mm (6.7 in) in 1975
The wettest day of the year at Coalcoman (Smn), 1926 to 2006. The record is 169.9 mm (6.7 in) in 1975, marked on the chart; the median year is 68.1 mm (2.7 in).
Wettest day (Rx1day) at Coalcoman (Smn) by year
YearWettest day (Rx1day)
19260.8 mm (0.03 in)
19270.0 mm (0.00 in)
193652.1 mm (2.1 in)
193753.6 mm (2.1 in)
193868.6 mm (2.7 in)
193953.6 mm (2.1 in)
194044.7 mm (1.8 in)
194169.9 mm (2.8 in)
194254.6 mm (2.1 in)
194361.2 mm (2.4 in)
194446.0 mm (1.8 in)
1945150.9 mm (5.9 in)
194674.9 mm (2.9 in)
194760.2 mm (2.4 in)
194879.8 mm (3.1 in)
194984.8 mm (3.3 in)
195041.1 mm (1.6 in)
195184.8 mm (3.3 in)
195259.9 mm (2.4 in)
195353.3 mm (2.1 in)
195474.9 mm (2.9 in)
195567.6 mm (2.7 in)
195689.9 mm (3.5 in)
195755.9 mm (2.2 in)
195881.8 mm (3.2 in)
195959.9 mm (2.4 in)
196085.9 mm (3.4 in)
196149.3 mm (1.9 in)
196264.8 mm (2.6 in)
196379.8 mm (3.1 in)
196461.0 mm (2.4 in)
196553.8 mm (2.1 in)
1966125.0 mm (4.9 in)
196778.0 mm (3.1 in)
196879.8 mm (3.1 in)
196991.9 mm (3.6 in)
197064.8 mm (2.6 in)
197195.0 mm (3.7 in)
197270.9 mm (2.8 in)
197379.8 mm (3.1 in)
197495.0 mm (3.7 in)
1975169.9 mm (6.7 in)
197679.8 mm (3.1 in)
197779.8 mm (3.1 in)
197866.8 mm (2.6 in)
197989.9 mm (3.5 in)
198055.9 mm (2.2 in)
198179.8 mm (3.1 in)
198281.8 mm (3.2 in)
198379.8 mm (3.1 in)
198471.4 mm (2.8 in)
198579.8 mm (3.1 in)
198663.8 mm (2.5 in)
198764.8 mm (2.6 in)
198879.8 mm (3.1 in)
198943.9 mm (1.7 in)
1997n/a
20003.3 mm (0.13 in)
200119.8 mm (0.8 in)
200540.4 mm (1.6 in)
200652.3 mm (2.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Coalcoman (Smn) by year The wettest five days of the year at Coalcoman (Smn), 1926 to 2006. The record is 317.5 mm (12.5 in) in 1951, marked on the chart; the median year is 139.9 mm (5.5 in). 01002003004001940196019802000Record: 317.5 mm (12.5 in) in 1951
The wettest five days of the year at Coalcoman (Smn), 1926 to 2006. The record is 317.5 mm (12.5 in) in 1951, marked on the chart; the median year is 139.9 mm (5.5 in).
Wettest five days (Rx5day) at Coalcoman (Smn) by year
YearWettest five days (Rx5day)
19260.8 mm (0.03 in)
19270.0 mm (0.00 in)
1936117.3 mm (4.6 in)
1937143.1 mm (5.6 in)
1938145.9 mm (5.7 in)
1939110.5 mm (4.4 in)
194078.3 mm (3.1 in)
194189.5 mm (3.5 in)
194289.4 mm (3.5 in)
1943110.5 mm (4.4 in)
1944102.0 mm (4.0 in)
1945175.6 mm (6.9 in)
1946181.9 mm (7.2 in)
1947102.5 mm (4.0 in)
1948156.4 mm (6.2 in)
1949213.4 mm (8.4 in)
1950123.7 mm (4.9 in)
1951317.5 mm (12.5 in)
1952150.1 mm (5.9 in)
195387.6 mm (3.4 in)
1954207.0 mm (8.1 in)
1955202.5 mm (8.0 in)
1956113.4 mm (4.5 in)
195796.0 mm (3.8 in)
1958203.2 mm (8.0 in)
1959174.1 mm (6.9 in)
1960244.4 mm (9.6 in)
196178.7 mm (3.1 in)
1962102.0 mm (4.0 in)
196392.8 mm (3.7 in)
1964113.0 mm (4.4 in)
196598.1 mm (3.9 in)
1966217.7 mm (8.6 in)
1967146.1 mm (5.8 in)
1968242.3 mm (9.5 in)
1969137.2 mm (5.4 in)
1970186.5 mm (7.3 in)
1971179.9 mm (7.1 in)
1972168.4 mm (6.6 in)
1973130.1 mm (5.1 in)
1974226.5 mm (8.9 in)
1975240.0 mm (9.4 in)
1976149.4 mm (5.9 in)
1977111.5 mm (4.4 in)
1978134.5 mm (5.3 in)
1979150.4 mm (5.9 in)
1980157.5 mm (6.2 in)
1981126.6 mm (5.0 in)
1982174.4 mm (6.9 in)
1983178.3 mm (7.0 in)
1984146.8 mm (5.8 in)
1985142.5 mm (5.6 in)
1986117.4 mm (4.6 in)
1987149.3 mm (5.9 in)
1988284.4 mm (11.2 in)
198997.6 mm (3.8 in)
1997n/a
20003.3 mm (0.13 in)
200119.8 mm (0.8 in)
200557.4 mm (2.3 in)
200692.2 mm (3.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Coalcoman (Smn) by year The longest dry spell of the year at Coalcoman (Smn), 1926 to 2006. The record is 154 days in 1987, marked on the chart; the median year is 74 days. 0501001502001940196019802000Record: 154 days in 1987
The longest dry spell of the year at Coalcoman (Smn), 1926 to 2006. The record is 154 days in 1987, marked on the chart; the median year is 74 days.
Longest dry spell (CDD) at Coalcoman (Smn) by year
YearLongest dry spell (CDD)
192631 days
192790 days
193651 days
193750 days
193859 days
193974 days
1940115 days
194183 days
194280 days
194358 days
194492 days
194558 days
194657 days
194776 days
194829 days
194954 days
195090 days
195175 days
195278 days
195373 days
195451 days
1955118 days
195690 days
195758 days
195888 days
195958 days
1960142 days
1961115 days
1962109 days
196391 days
196480 days
196566 days
196666 days
1967102 days
196863 days
1969115 days
197066 days
197171 days
197293 days
197353 days
197449 days
197593 days
1976113 days
197744 days
197891 days
1979106 days
198099 days
198196 days
198252 days
198371 days
198431 days
198583 days
198655 days
1987154 days
198842 days
198915 days
1997n/a
200022 days
200150 days
200539 days
200676 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

44 years, 1937 to 2006

A day with at least 69.6 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 136.9 mm (5.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Coalcoman (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years69.6 mm (2.7 in)
5 years86.2 mm (3.4 in)
10 years97.8 mm (3.9 in)
25 years113.0 mm (4.4 in)
50 years124.8 mm (4.9 in)Longer than the 44 years of record
100 years136.9 mm (5.4 in)Longer than the 44 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 44 years of values from 1937 to 2006.

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: 150.9 mm (5.9 in) in 1945; 125.0 mm (4.9 in) in 1966; 95.0 mm (3.7 in) in 1971.

Download the Data

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