Built 2026-10-18 (18 October 2026)

Charleston Weather Records (USC00231540)

Record envelope, standing records and threshold days for Charleston (USC00231540), Missouri, United States, with 52 years of record.

Key Facts for Charleston

  • Charleston (USC00231540) is a weather station in Missouri, United States at 36.93 latitude and -89.35 longitude, 101 m (330 ft) above sea level.
  • The station reports from 1951 to 2002, 52 years of record.
  • 1,464 records set at Charleston still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Charleston set a daily record precipitation of 28.2 mm (1.1 in) on 10 October 2002.

About the Station

  • Location: Missouri, United States, 36.93 latitude, -89.35 longitude.
  • Elevation: 101 m (330 ft).
  • Period of record: 1951 to 2002, 52 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Charleston, with 2026 drawn through them The band shows the record high and record low for each calendar day at Charleston. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Charleston. 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 Charleston, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan23.3 C (73.9 F)-27.8 C (-18.0 F)n/an/a
Feb25.6 C (78.1 F)-19.4 C (-2.9 F)n/an/a
Mar29.4 C (84.9 F)-18.3 C (-0.9 F)n/an/a
Apr36.1 C (97.0 F)-5.0 C (23.0 F)n/an/a
May36.7 C (98.1 F)0.6 C (33.1 F)n/an/a
Jun40.0 C (104.0 F)7.8 C (46.0 F)n/an/a
Jul41.1 C (106.0 F)10.6 C (51.1 F)n/an/a
Aug40.6 C (105.1 F)6.1 C (43.0 F)n/an/a
Sep39.4 C (102.9 F)1.7 C (35.1 F)n/an/a
Oct33.9 C (93.0 F)-5.6 C (21.9 F)n/an/a
Nov30.6 C (87.1 F)-11.7 C (10.9 F)n/an/a
Dec23.3 C (73.9 F)-22.8 C (-9.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Charleston by the year they were set 1,464 records at Charleston still stand. 1954 holds the most, with 64. 0204060801951: 261952: 561953: 571954: 641955: 391956: 281957: 141958: 271959: 291960: 361961: 241962: 391963: 441964: 281965: 381966: 381967: 411968: 191969: 211970: 351971: 331972: 371973: 101974: 151975: 241976: 341977: 321978: 351979: 271980: 501981: 141982: 81983: 481984: 311985: 231986: 251987: 271988: 191989: 471990: 291991: 251992: 161996: 81997: 221998: 281999: 252000: 372001: 152002: 171951195619611966197119761981198619911999
1,464 records at Charleston still stand. 1954 holds the most, with 64.
Standing records at Charleston by the year they were set
Year setStanding records
195126
195256
195357
195464
195539
195628
195714
195827
195929
196036
196124
196239
196344
196428
196538
196638
196741
196819
196921
197035
197133
197237
197310
197415
197524
197634
197732
197835
197927
198050
198114
19828
198348
198431
198523
198625
198727
198819
198947
199029
199125
199216
19968
199722
199828
199925
200037
200115
200217

All-Time Record Progression

6 new records
When Charleston set new all-time records 6 all-time records were set at Charleston between 4 January 1985 and 9 March 1994. Each dot is a new record. Record snow depthRecord low minimum temperatureRecord low maximum temperatureRecord high minimum temperatureRecord daily snowfall4 January 1985: Record snow depth 35.6 cm (14.0 in)20 January 1985: Record low minimum temperature -26.7 C (-16.1 F)21 January 1985: Record low maximum temperature -17.8 C (0.0 F)21 January 1985: Record low minimum temperature -27.8 C (-18.0 F)26 June 1987: Record high minimum temperature 30.6 C (87.1 F)9 March 1994: Record daily snowfall 22.9 cm (9.0 in)198519901995
6 all-time records were set at Charleston between 4 January 1985 and 9 March 1994. Each dot is a new record.
When Charleston set new all-time records
DateKindDetail
1985-01-04Record snow depthRecord snow depth 35.6 cm (14.0 in)
1985-01-20Record low minimum temperatureRecord low minimum temperature -26.7 C (-16.1 F)
1985-01-21Record low maximum temperatureRecord low maximum temperature -17.8 C (0.0 F)
1985-01-21Record low minimum temperatureRecord low minimum temperature -27.8 C (-18.0 F)
1987-06-26Record high minimum temperatureRecord high minimum temperature 30.6 C (87.1 F)
1994-03-09Record daily snowfallRecord daily snowfall 22.9 cm (9.0 in)

Wettest Day of Each Month

Aug: 165.1 mm (6.5 in)
Record daily precipitation for each month at Charleston The wettest day on record for each calendar month at Charleston. The most was 165.1 mm (6.5 in) on 12 August 1952. 050100150200 Jan: 105.4 mm (4.1 in), 3 January 2000 Jan Feb: 139.4 mm (5.5 in), 14 February 1989 Feb Mar: 158.2 mm (6.2 in), 9 March 1964 Mar Apr: 80.3 mm (3.2 in), 5 April 1997 Apr May: 104.1 mm (4.1 in), 3 May 1983 May Jun: 121.7 mm (4.8 in), 16 June 1976 Jun Jul: 94.2 mm (3.7 in), 31 July 2000 Jul Aug: 165.1 mm (6.5 in), 12 August 1952 Aug Sep: 149.1 mm (5.9 in), 11 September 1965 Sep Oct: 87.6 mm (3.4 in), 7 October 1998 Oct Nov: 102.1 mm (4.0 in), 13 November 1957 Nov Dec: 109.2 mm (4.3 in), 17 December 2001 Dec
The wettest day on record for each calendar month at Charleston. The most was 165.1 mm (6.5 in) on 12 August 1952.
Record daily precipitation for each month at Charleston
MonthRecord daily precipitation (mm)Date
Jan105.4 mm (4.1 in)3 January 2000
Feb139.4 mm (5.5 in)14 February 1989
Mar158.2 mm (6.2 in)9 March 1964
Apr80.3 mm (3.2 in)5 April 1997
May104.1 mm (4.1 in)3 May 1983
Jun121.7 mm (4.8 in)16 June 1976
Jul94.2 mm (3.7 in)31 July 2000
Aug165.1 mm (6.5 in)12 August 1952
Sep149.1 mm (5.9 in)11 September 1965
Oct87.6 mm (3.4 in)7 October 1998
Nov102.1 mm (4.0 in)13 November 1957
Dec109.2 mm (4.3 in)17 December 2001

Period of Record Coverage

1951 to 2002
Days with data per year at Charleston 49 years of record at Charleston, 1951 to 2002. 15 years have data for under 90 percent of days and are left out of rankings: 1951, 1974, 1980, 1981, 1982, 1984, 1985, 1986 and others. 1951: 245 of 365 days1952: 364 of 366 days1953: 359 of 365 days1954: 364 of 365 days1955: 359 of 365 days1956: 365 of 366 days1957: 359 of 365 days1958: 363 of 365 days1959: 365 of 365 days1960: 359 of 366 days1961: 365 of 365 days1962: 364 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 364 of 365 days1967: 334 of 365 days1968: 351 of 366 days1969: 365 of 365 days1970: 364 of 365 days1971: 365 of 365 days1972: 364 of 366 days1973: 365 of 365 days1974: 153 of 365 days1975: 364 of 365 days1976: 366 of 366 days1977: 332 of 365 days1978: 334 of 365 days1979: 363 of 365 days1980: 304 of 366 days1981: 300 of 365 days1982: 241 of 365 days1983: 349 of 365 days1984: 294 of 366 days1985: 253 of 365 days1986: 248 of 365 days1987: 252 of 365 days1988: 274 of 366 days1989: 358 of 365 days1990: 268 of 365 days1991: 238 of 365 days1992: 181 of 366 days1996: 214 of 366 days1997: 359 of 365 days1998: 352 of 365 days1999: 343 of 365 days2000: 349 of 366 days2001: 354 of 365 days2002: 279 of 365 days19601970198019902000
49 years of record at Charleston, 1951 to 2002. 15 years have data for under 90 percent of days and are left out of rankings: 1951, 1974, 1980, 1981, 1982, 1984, 1985, 1986 and others.
Days with data per year at Charleston
YearDays with dataShare of yearComplete
195124567%No
195236499%Yes
195335998%Yes
1954364100%Yes
195535998%Yes
1956365100%Yes
195735998%Yes
195836399%Yes
1959365100%Yes
196035998%Yes
1961365100%Yes
1962364100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966364100%Yes
196733492%Yes
196835196%Yes
1969365100%Yes
1970364100%Yes
1971365100%Yes
197236499%Yes
1973365100%Yes
197415342%No
1975364100%Yes
1976366100%Yes
197733291%Yes
197833492%Yes
197936399%Yes
198030483%No
198130082%No
198224166%No
198334996%Yes
198429480%No
198525369%No
198624868%No
198725269%No
198827475%No
198935898%Yes
199026873%No
199123865%No
199218149%No
199621458%No
199735998%Yes
199835296%Yes
199934394%Yes
200034995%Yes
200135497%Yes
200227976%No

Latest Records

20
Latest records at Charleston
DateStationRecordValueBeat old record byOld record stoodSignificance
10 October 2002Charleston, USdaily rain28.2 mm (1.1 in)11.2 mm (0.4 in)36 years22 of 100 (Routine)
4 October 2002Charleston, USdaily high min20.6 C (69.1 F)0.6 C (1.1 F)43 years18 of 100 (Routine)
4 October 2002Charleston, USdaily rain13.7 mm (0.5 in)4.0 mm (0.16 in)19 years12 of 100 (Routine)
3 October 2002Charleston, USdaily high min21.1 C (70.0 F)0.5 C (0.9 F)43 years17 of 100 (Routine)
2 October 2002Charleston, USdaily high min (Tie)19.4 C (66.9 F)tie48 years4 of 100 (Routine)
20 September 2002Charleston, USdaily rain42.7 mm (1.7 in)2.6 mm (0.10 in)27 years14 of 100 (Routine)
17 August 2002Charleston, USdaily low max (Tie)26.7 C (80.1 F)tie12 years2 of 100 (Routine)
13 August 2002Charleston, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)45 years19 of 100 (Routine)
2 August 2002Charleston, USdaily high min (Tie)23.9 C (75.0 F)tie48 years4 of 100 (Routine)
28 July 2002Charleston, USdaily high min (Tie)24.4 C (75.9 F)tie4 years1 of 100 (Routine)
22 July 2002Charleston, USdaily high min25.6 C (78.1 F)1.2 C (2.2 F)51 years24 of 100 (Routine)
12 July 2002Charleston, USdaily low max22.8 C (73.0 F)3.3 C (5.9 F)37 years26 of 100 (Routine)
12 July 2002Charleston, USdaily rain36.6 mm (1.4 in)14.8 mm (0.6 in)12 years17 of 100 (Routine)
6 June 2002Charleston, USdaily rain47.8 mm (1.9 in)7.2 mm (0.28 in)20 years16 of 100 (Routine)
5 June 2002Charleston, USdaily high min23.3 C (73.9 F)1.6 C (2.9 F)36 years20 of 100 (Routine)
4 June 2002Charleston, USdaily high max34.4 C (93.9 F)0.5 C (0.9 F)48 years20 of 100 (Routine)
4 June 2002Charleston, USdaily high min (Tie)22.8 C (73.0 F)tie11 years2 of 100 (Routine)
3 June 2002Charleston, USdaily high min (Tie)22.2 C (72.0 F)tie4 years1 of 100 (Routine)
22 May 2002Charleston, USdaily low max17.8 C (64.0 F)0.5 C (0.9 F)23 years12 of 100 (Routine)
22 May 2002Charleston, USdaily low min (Tie)7.2 C (45.0 F)tie33 years3 of 100 (Routine)

Climate Trend

30 complete years, 1952 to 2001
Annual mean temperature at Charleston as warming stripes, 1952 to 2001 One stripe for each of 30 complete years at Charleston, 1952 to 2001. Blue stripes are years cooler than the station's own mean of 14.7 C (58.4 F); red stripes are warmer. The coolest year was 1979, at 12.2 C (54.0 F), and the warmest was 1954, at 16.2 C (61.2 F). The strongest colour marks a difference of 2.5 C (4.5 F). 1952: 15.6 C, +0.9 C from the station mean1953: 15.9 C, +1.2 C from the station mean1954: 16.2 C, +1.5 C from the station mean1955: 15.5 C, +0.8 C from the station mean1956: 15.8 C, +1.1 C from the station mean1957: 15.5 C, +0.8 C from the station mean1958: 14.4 C, -0.3 C from the station mean1959: 15.4 C, +0.7 C from the station mean1960: 14.5 C, -0.2 C from the station mean1961: 14.5 C, -0.2 C from the station mean1962: 14.9 C, +0.2 C from the station mean1963: 14.7 C, 0.0 C from the station mean1964: 15.4 C, +0.7 C from the station mean1965: 15.4 C, +0.7 C from the station mean1966: 13.7 C, -1.0 C from the station mean1969: 14.8 C, +0.1 C from the station mean1970: 15.1 C, +0.4 C from the station mean1971: 15.3 C, +0.6 C from the station mean1972: 14.2 C, -0.5 C from the station mean1973: 14.7 C, 0.0 C from the station mean1975: 14.1 C, -0.6 C from the station mean1976: 13.3 C, -1.4 C from the station mean1979: 12.2 C, -2.5 C from the station mean1983: 12.9 C, -1.8 C from the station mean1989: 13.1 C, -1.6 C from the station mean1997: 13.6 C, -1.1 C from the station mean1998: 15.9 C, +1.2 C from the station mean1999: 15.2 C, +0.5 C from the station mean2000: 14.4 C, -0.3 C from the station mean2001: 14.7 C, 0.0 C from the station mean19521955196019651970197519801985199019952000
One stripe for each of 30 complete years at Charleston, 1952 to 2001. Blue stripes are years cooler than the station's own mean of 14.7 C (58.4 F); red stripes are warmer. The coolest year was 1979, at 12.2 C (54.0 F), and the warmest was 1954, at 16.2 C (61.2 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Charleston as warming stripes, 1952 to 2001
YearAnnual mean temperatureDifference from the station mean
195215.6 C+0.90 C
195315.9 C+1.19 C
195416.2 C+1.51 C
195515.5 C+0.76 C
195615.8 C+1.07 C
195715.5 C+0.85 C
195814.4 C-0.33 C
195915.4 C+0.71 C
196014.5 C-0.23 C
196114.5 C-0.15 C
196214.9 C+0.17 C
196314.7 C-0.02 C
196415.4 C+0.74 C
196515.4 C+0.69 C
196613.7 C-0.96 C
196914.8 C+0.06 C
197015.1 C+0.39 C
197115.3 C+0.63 C
197214.2 C-0.46 C
197314.7 C-0.03 C
197514.1 C-0.61 C
197613.3 C-1.40 C
197912.2 C-2.45 C
198312.9 C-1.75 C
198913.1 C-1.63 C
199713.6 C-1.07 C
199815.9 C+1.22 C
199915.2 C+0.49 C
200014.4 C-0.31 C
200114.7 C+0.04 C

The annual mean temperature here has fallen by 0.26 C (0.04 to 0.48) per decade over 1952 to 2001. In Fahrenheit: 0.5 F (0.1 to 0.9) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Charleston
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.26 C (-0.48 to -0.04) per decade-0.5 F (-0.9 to -0.1) per decade1952 to 200130Fall
Mean daily maximum-0.3 C (-0.6 to -0.1) per decade-0.6 F (-1.0 to -0.2) per decade1952 to 200130Fall
Mean daily minimum-0.2 C (-0.4 to 0.1) per decade-0.3 F (-0.8 to 0.1) per decade1952 to 200130Not clearly different from zero

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

1951 to 2002
Yearly extremes at Charleston: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.1 C (106.0 F)198037.8 C (100.0 F)49
Coldest night (TNn)-27.8 C (-18.0 F)1985-16.1 C (3.0 F)49
Wettest day (Rx1day)165.1 mm (6.5 in)195273.4 mm (2.9 in)52
Wettest five days (Rx5day)247.3 mm (9.7 in)1989120.9 mm (4.8 in)52
Longest dry spell (CDD)48 days196419 days52

Hottest day (TXx)

Hottest day (TXx) at Charleston by year The hottest day of the year at Charleston, 1951 to 2002. The record is 41.1 C (106.0 F) in 1980, marked on the chart; the median year is 37.8 C (100.0 F). 253035404519601970198019902000Record: 41.1 C (106.0 F) in 1980
The hottest day of the year at Charleston, 1951 to 2002. The record is 41.1 C (106.0 F) in 1980, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Charleston by year
YearHottest day (TXx)
195138.9 C (102.0 F)
195240.0 C (104.0 F)
195338.9 C (102.0 F)
195440.6 C (105.1 F)
195536.7 C (98.1 F)
195639.4 C (102.9 F)
195736.7 C (98.1 F)
195836.7 C (98.1 F)
195935.6 C (96.1 F)
196038.3 C (100.9 F)
196135.0 C (95.0 F)
196238.3 C (100.9 F)
196337.8 C (100.0 F)
196439.4 C (102.9 F)
196538.3 C (100.9 F)
196640.0 C (104.0 F)
196736.1 C (97.0 F)
196836.7 C (98.1 F)
196937.8 C (100.0 F)
197037.8 C (100.0 F)
197137.8 C (100.0 F)
197235.6 C (96.1 F)
197337.2 C (99.0 F)
197429.4 C (84.9 F)
197536.7 C (98.1 F)
197637.8 C (100.0 F)
197737.2 C (99.0 F)
197837.8 C (100.0 F)
197935.6 C (96.1 F)
198041.1 C (106.0 F)
198135.6 C (96.1 F)
198237.2 C (99.0 F)
198338.3 C (100.9 F)
198436.1 C (97.0 F)
198538.9 C (102.0 F)
198637.8 C (100.0 F)
198738.9 C (102.0 F)
198839.4 C (102.9 F)
198935.6 C (96.1 F)
199037.8 C (100.0 F)
199136.7 C (98.1 F)
199235.6 C (96.1 F)
1993n/a
1994n/a
1995n/a
199636.7 C (98.1 F)
199738.3 C (100.9 F)
199837.8 C (100.0 F)
199938.3 C (100.9 F)
200038.3 C (100.9 F)
200137.2 C (99.0 F)
200236.1 C (97.0 F)

Coldest night (TNn)

Coldest night (TNn) at Charleston by year The coldest night of the year at Charleston, 1951 to 2002. The record is -27.8 C (-18.0 F) in 1985, marked on the chart; the median year is -16.1 C (3.0 F). -30-20-10019601970198019902000Record: -27.8 C (-18.0 F) in 1985
The coldest night of the year at Charleston, 1951 to 2002. The record is -27.8 C (-18.0 F) in 1985, marked on the chart; the median year is -16.1 C (3.0 F).
Coldest night (TNn) at Charleston by year
YearColdest night (TNn)
1951-15.0 C (5.0 F)
1952-12.8 C (9.0 F)
1953-12.2 C (10.0 F)
1954-14.4 C (6.1 F)
1955-16.1 C (3.0 F)
1956-10.6 C (12.9 F)
1957-13.3 C (8.1 F)
1958-18.9 C (-2.0 F)
1959-17.8 C (0.0 F)
1960-18.3 C (-0.9 F)
1961-16.7 C (1.9 F)
1962-22.2 C (-8.0 F)
1963-21.7 C (-7.1 F)
1964-13.9 C (7.0 F)
1965-18.3 C (-0.9 F)
1966-20.0 C (-4.0 F)
1967-15.0 C (5.0 F)
1968-19.4 C (-2.9 F)
1969-13.3 C (8.1 F)
1970-20.0 C (-4.0 F)
1971-15.0 C (5.0 F)
1972-18.9 C (-2.0 F)
1973-16.1 C (3.0 F)
1974-14.4 C (6.1 F)
1975-12.2 C (10.0 F)
1976-18.3 C (-0.9 F)
1977-22.8 C (-9.0 F)
1978-18.3 C (-0.9 F)
1979-18.9 C (-2.0 F)
1980-17.8 C (0.0 F)
1981-15.6 C (3.9 F)
1982-19.4 C (-2.9 F)
1983-22.8 C (-9.0 F)
1984-22.8 C (-9.0 F)
1985-27.8 C (-18.0 F)
1986-17.8 C (0.0 F)
1987-11.7 C (10.9 F)
1988-7.2 C (19.0 F)
1989-22.2 C (-8.0 F)
1990-5.0 C (23.0 F)
1991-8.9 C (16.0 F)
1992-11.7 C (10.9 F)
1993n/a
1994n/a
1995n/a
1996-13.3 C (8.1 F)
1997-20.6 C (-5.1 F)
1998-11.1 C (12.0 F)
1999-14.4 C (6.1 F)
2000-14.4 C (6.1 F)
2001-16.1 C (3.0 F)
2002-11.7 C (10.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Charleston by year The wettest day of the year at Charleston, 1951 to 2002. The record is 165.1 mm (6.5 in) in 1952, marked on the chart; the median year is 73.4 mm (2.9 in). 05010015020019601970198019902000Record: 165.1 mm (6.5 in) in 1952
The wettest day of the year at Charleston, 1951 to 2002. The record is 165.1 mm (6.5 in) in 1952, marked on the chart; the median year is 73.4 mm (2.9 in).
Wettest day (Rx1day) at Charleston by year
YearWettest day (Rx1day)
195177.7 mm (3.1 in)
1952165.1 mm (6.5 in)
195347.0 mm (1.9 in)
195457.2 mm (2.3 in)
195569.1 mm (2.7 in)
195653.3 mm (2.1 in)
1957102.1 mm (4.0 in)
195859.7 mm (2.4 in)
195972.4 mm (2.9 in)
196042.7 mm (1.7 in)
1961102.1 mm (4.0 in)
196257.7 mm (2.3 in)
196368.6 mm (2.7 in)
1964158.2 mm (6.2 in)
1965149.1 mm (5.9 in)
196680.8 mm (3.2 in)
196795.3 mm (3.8 in)
196850.8 mm (2.0 in)
196998.6 mm (3.9 in)
197079.2 mm (3.1 in)
197168.6 mm (2.7 in)
197281.3 mm (3.2 in)
197376.2 mm (3.0 in)
197433.8 mm (1.3 in)
197599.8 mm (3.9 in)
1976121.7 mm (4.8 in)
197748.3 mm (1.9 in)
1978109.2 mm (4.3 in)
197958.7 mm (2.3 in)
198044.7 mm (1.8 in)
198150.8 mm (2.0 in)
198269.1 mm (2.7 in)
1983104.1 mm (4.1 in)
198491.7 mm (3.6 in)
198554.6 mm (2.1 in)
198666.5 mm (2.6 in)
198751.6 mm (2.0 in)
198883.1 mm (3.3 in)
1989139.4 mm (5.5 in)
199062.2 mm (2.4 in)
199152.3 mm (2.1 in)
199253.3 mm (2.1 in)
199374.4 mm (2.9 in)
199467.6 mm (2.7 in)
199543.9 mm (1.7 in)
199653.1 mm (2.1 in)
199796.8 mm (3.8 in)
199887.6 mm (3.4 in)
199978.5 mm (3.1 in)
2000105.4 mm (4.1 in)
2001109.2 mm (4.3 in)
200281.0 mm (3.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Charleston by year The wettest five days of the year at Charleston, 1951 to 2002. The record is 247.3 mm (9.7 in) in 1989, marked on the chart; the median year is 120.9 mm (4.8 in). 5010015020025019601970198019902000Record: 247.3 mm (9.7 in) in 1989
The wettest five days of the year at Charleston, 1951 to 2002. The record is 247.3 mm (9.7 in) in 1989, marked on the chart; the median year is 120.9 mm (4.8 in).
Wettest five days (Rx5day) at Charleston by year
YearWettest five days (Rx5day)
1951114.0 mm (4.5 in)
1952173.4 mm (6.8 in)
195375.9 mm (3.0 in)
195478.5 mm (3.1 in)
1955135.7 mm (5.3 in)
1956110.7 mm (4.4 in)
1957176.2 mm (6.9 in)
1958114.6 mm (4.5 in)
195994.7 mm (3.7 in)
196076.5 mm (3.0 in)
1961171.2 mm (6.7 in)
1962151.7 mm (6.0 in)
1963125.0 mm (4.9 in)
1964202.1 mm (8.0 in)
1965177.0 mm (7.0 in)
1966119.5 mm (4.7 in)
1967129.1 mm (5.1 in)
1968135.2 mm (5.3 in)
1969160.3 mm (6.3 in)
1970104.5 mm (4.1 in)
197189.9 mm (3.5 in)
1972113.4 mm (4.5 in)
1973172.7 mm (6.8 in)
197457.4 mm (2.3 in)
1975161.8 mm (6.4 in)
1976139.3 mm (5.5 in)
197776.2 mm (3.0 in)
1978131.8 mm (5.2 in)
1979150.4 mm (5.9 in)
198052.9 mm (2.1 in)
198181.6 mm (3.2 in)
198275.7 mm (3.0 in)
1983122.2 mm (4.8 in)
1984144.1 mm (5.7 in)
198577.5 mm (3.1 in)
1986100.6 mm (4.0 in)
1987102.4 mm (4.0 in)
1988129.1 mm (5.1 in)
1989247.3 mm (9.7 in)
199079.7 mm (3.1 in)
199187.9 mm (3.5 in)
199267.0 mm (2.6 in)
1993127.3 mm (5.0 in)
199478.3 mm (3.1 in)
199586.7 mm (3.4 in)
199659.2 mm (2.3 in)
1997164.6 mm (6.5 in)
1998166.1 mm (6.5 in)
1999109.8 mm (4.3 in)
2000161.8 mm (6.4 in)
2001153.1 mm (6.0 in)
2002142.3 mm (5.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Charleston by year The longest dry spell of the year at Charleston, 1951 to 2002. The record is 48 days in 1964, marked on the chart; the median year is 19 days. 102030405019601970198019902000Record: 48 days in 1964
The longest dry spell of the year at Charleston, 1951 to 2002. The record is 48 days in 1964, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Charleston by year
YearLongest dry spell (CDD)
195128 days
195230 days
195326 days
195419 days
195523 days
195618 days
195725 days
195824 days
195916 days
196017 days
196116 days
196215 days
196328 days
196448 days
196515 days
196625 days
196717 days
196818 days
196917 days
197020 days
197115 days
197227 days
197315 days
197415 days
197517 days
197620 days
197718 days
197816 days
197920 days
198022 days
198118 days
198219 days
198320 days
198420 days
198515 days
198621 days
198731 days
198836 days
198928 days
199014 days
199119 days
199210 days
199312 days
199414 days
199526 days
199619 days
199721 days
199834 days
199943 days
200019 days
200115 days
200224 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.

Frost Dates and Growing Season

30 years with a frost

Across 30 years with a frost, the median last spring frost at Charleston falls on 5 April and the median first autumn frost on 27 October, which leaves a median of 209 days between them.

Fitted over all years, the growing season changes by +0.4 days per decade at this station.

Frost dates and growing season at Charleston
MeasureMedian, all yearsEarliest periodRecent period (1952 to 2001)Recent against earliestFitted trend
Last spring frost5 Apriln/a5 Apriln/a-1.1 days per decade
First autumn frost27 Octobern/a27 Octobern/a-0.7 days per decade
Growing days209 daysn/a209 daysn/a+0.4 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

39 years, 1952 to 2001

A day with at least 79.7 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 188.6 mm (7.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Charleston: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years79.7 mm (3.1 in)
5 years108.2 mm (4.3 in)
10 years127.4 mm (5.0 in)
25 years151.8 mm (6.0 in)
50 years170.2 mm (6.7 in)Longer than the 39 years of record
100 years188.6 mm (7.4 in)Longer than the 39 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, 39 years of values from 1952 to 2001.

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: 165.1 mm (6.5 in) in 1952; 158.2 mm (6.2 in) in 1964; 149.1 mm (5.9 in) in 1965.

Download the Data

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