Record envelope, standing records and threshold days for Charleston (USC00221606), Mississippi, United States, with 106 years of record.
Key Facts for Charleston
Charleston (USC00221606) is a weather station in Mississippi, United States at 34.00 latitude and -90.07 longitude, 55 m (180 ft) above sea level.
The station reports from 1910 to 2015, 106 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 low minimum temperature of -13.3 C (8.1 F) on 8 January 2015.
About the Station
Location: Mississippi, United States, 34.00 latitude, -90.07 longitude.
Elevation: 55 m (180 ft).
Period of record: 1910 to 2015, 106 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
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
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.2 C (81.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Feb
29.4 C (84.9 F)
-15.0 C (5.0 F)
n/a
n/a
Mar
31.7 C (89.1 F)
-10.6 C (12.9 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-3.3 C (26.1 F)
n/a
n/a
May
37.2 C (99.0 F)
2.8 C (37.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
6.1 C (43.0 F)
n/a
n/a
Jul
40.6 C (105.1 F)
11.1 C (52.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
7.2 C (45.0 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-6.7 C (19.9 F)
n/a
n/a
Nov
31.7 C (89.1 F)
-11.1 C (12.0 F)
n/a
n/a
Dec
28.3 C (82.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Charleston still stand. 1921 holds the most, with 68.
Standing records at Charleston by the year they were set
Year set
Standing records
1911
18
1912
36
1913
26
1914
26
1915
32
1916
34
1917
36
1918
50
1919
18
1920
26
1921
68
1922
6
1951
24
1952
47
1953
23
1954
34
1955
22
1956
24
1957
18
1958
21
1959
12
1960
19
1961
18
1962
28
1963
33
1964
25
1965
22
1966
15
1967
28
1968
14
1969
9
1970
26
1971
17
1972
16
1973
5
1974
20
1975
17
1976
24
1977
28
1978
8
1979
10
1980
32
1981
20
1982
32
1988
8
1989
41
1990
13
1991
21
1992
16
1993
20
1994
7
1995
10
1996
28
1997
13
1998
21
1999
9
2000
21
2001
4
2002
17
2003
8
2004
15
2005
20
2006
11
2007
18
2008
11
2009
3
2010
5
2011
14
2012
8
2013
12
2014
22
2015
1
All-Time Record Progression
2 new records
2 all-time records were set at Charleston between 23 December 1989 and 29 November 2001. Each dot is a new record.
When Charleston set new all-time records
Date
Kind
Detail
1989-12-23
Record low maximum temperature
Record low maximum temperature -12.2 C (10.0 F)
2001-11-29
Record daily precipitation
Record daily precipitation 183.6 mm (7.2 in)
Wettest Day of Each Month
Nov: 183.6 mm (7.2 in)
The wettest day on record for each calendar month at Charleston. The most was 183.6 mm (7.2 in) on 29 November 2001.
Record daily precipitation for each month at Charleston
Month
Record daily precipitation (mm)
Date
Jan
116.8 mm (4.6 in)
31 January 1915
Feb
150.6 mm (5.9 in)
19 February 1991
Mar
160.0 mm (6.3 in)
17 March 1919
Apr
134.1 mm (5.3 in)
29 April 1991
May
112.5 mm (4.4 in)
6 May 2003
Jun
165.1 mm (6.5 in)
24 June 1980
Jul
107.4 mm (4.2 in)
6 July 1910
Aug
155.2 mm (6.1 in)
11 August 2001
Sep
120.9 mm (4.8 in)
6 September 2011
Oct
150.1 mm (5.9 in)
14 October 2014
Nov
183.6 mm (7.2 in)
29 November 2001
Dec
146.6 mm (5.8 in)
26 December 1911
Period of Record Coverage
1911 to 2015
Complete yearUnder 90 percent of days
72 years of record at Charleston, 1911 to 2015. 24 years have data for under 90 percent of days and are left out of rankings: 1911, 1916, 1917, 1918, 1922, 1951, 1975, 1982 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Charleston, 1912 to 2000. Blue stripes are years cooler than the station's own mean of 16.8 C (62.3 F); red stripes are warmer. The coolest year was 1989, at 15.6 C (60.1 F), and the warmest was 1921, at 20.0 C (68.0 F). The strongest colour marks a difference of 3.2 C (5.8 F).
Annual mean temperature at Charleston as warming stripes, 1912 to 2000
Year
Annual mean temperature
Difference from the station mean
1912
17.5 C
+0.64 C
1914
16.9 C
+0.05 C
1915
17.0 C
+0.12 C
1916
17.4 C
+0.58 C
1919
17.8 C
+0.92 C
1920
17.0 C
+0.20 C
1921
20.0 C
+3.18 C
1952
16.4 C
-0.46 C
1953
17.5 C
+0.62 C
1954
17.7 C
+0.91 C
1955
16.9 C
+0.11 C
1956
17.1 C
+0.30 C
1957
17.3 C
+0.47 C
1958
15.8 C
-1.00 C
1959
17.0 C
+0.14 C
1960
16.3 C
-0.51 C
1961
16.5 C
-0.32 C
1962
17.2 C
+0.32 C
1963
16.5 C
-0.33 C
1964
17.0 C
+0.15 C
1965
17.1 C
+0.30 C
1966
16.4 C
-0.45 C
1967
16.5 C
-0.31 C
1968
16.0 C
-0.83 C
1971
16.7 C
-0.16 C
1972
16.6 C
-0.25 C
1973
16.9 C
+0.09 C
1976
16.2 C
-0.64 C
1981
17.2 C
+0.34 C
1989
15.6 C
-1.23 C
1991
16.8 C
-0.08 C
1993
16.0 C
-0.81 C
1994
16.7 C
-0.11 C
1995
16.7 C
-0.15 C
1996
16.2 C
-0.60 C
1997
15.8 C
-1.04 C
2000
16.8 C
0.00 C
The annual mean temperature here has fallen by 0.2 C (0.1 to 0.2) per decade over 1912 to 2000. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Charleston
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.2 C (-0.2 to -0.1) per decade
-0.3 F (-0.4 to -0.1) per decade
1912 to 2000
37
Fall
Mean daily maximum
-0.3 C (-0.4 to -0.2) per decade
-0.6 F (-0.8 to -0.4) per decade
1912 to 2000
37
Fall
Mean daily minimum
0.00 C (-0.09 to 0.09) per decade
0.01 F (-0.16 to 0.17) per decade
1912 to 2000
37
Not 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
1910 to 2015
Yearly extremes at Charleston: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1915
37.8 C (100.0 F)
72
Coldest night (TNn)
-22.2 C (-8.0 F)
1966
-10.6 C (12.9 F)
72
Wettest day (Rx1day)
183.6 mm (7.2 in)
2001
86.5 mm (3.4 in)
84
Wettest five days (Rx5day)
348.9 mm (13.7 in)
2001
132.9 mm (5.2 in)
83
Longest dry spell (CDD)
43 days
1920
20 days
84
Hottest day (TXx)
The hottest day of the year at Charleston, 1910 to 2015. The record is 42.2 C (108.0 F) in 1915, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Charleston by year
Year
Hottest day (TXx)
1910
n/a
1911
39.4 C (102.9 F)
1912
39.4 C (102.9 F)
1913
38.3 C (100.9 F)
1914
38.9 C (102.0 F)
1915
42.2 C (108.0 F)
1916
36.7 C (98.1 F)
1917
37.8 C (100.0 F)
1918
40.0 C (104.0 F)
1919
37.2 C (99.0 F)
1920
37.2 C (99.0 F)
1921
38.9 C (102.0 F)
1922
31.7 C (89.1 F)
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
40.6 C (105.1 F)
1952
39.4 C (102.9 F)
1953
39.4 C (102.9 F)
1954
40.6 C (105.1 F)
1955
37.2 C (99.0 F)
1956
40.0 C (104.0 F)
1957
37.2 C (99.0 F)
1958
36.7 C (98.1 F)
1959
38.3 C (100.9 F)
1960
38.3 C (100.9 F)
1961
36.1 C (97.0 F)
1962
38.9 C (102.0 F)
1963
40.0 C (104.0 F)
1964
38.3 C (100.9 F)
1965
37.8 C (100.0 F)
1966
39.4 C (102.9 F)
1967
36.1 C (97.0 F)
1968
37.8 C (100.0 F)
1969
38.9 C (102.0 F)
1970
40.0 C (104.0 F)
1971
38.3 C (100.9 F)
1972
37.8 C (100.0 F)
1973
36.7 C (98.1 F)
1974
36.7 C (98.1 F)
1975
37.2 C (99.0 F)
1976
38.3 C (100.9 F)
1977
39.4 C (102.9 F)
1978
37.8 C (100.0 F)
1979
37.2 C (99.0 F)
1980
40.6 C (105.1 F)
1981
37.8 C (100.0 F)
1982
39.4 C (102.9 F)
1988
38.9 C (102.0 F)
1989
36.1 C (97.0 F)
1990
38.3 C (100.9 F)
1991
37.2 C (99.0 F)
1992
34.4 C (93.9 F)
1993
37.2 C (99.0 F)
1994
34.4 C (93.9 F)
1995
37.2 C (99.0 F)
1996
35.6 C (96.1 F)
1997
36.1 C (97.0 F)
1998
37.8 C (100.0 F)
1999
37.8 C (100.0 F)
2000
41.1 C (106.0 F)
2001
36.7 C (98.1 F)
2002
36.7 C (98.1 F)
2003
37.2 C (99.0 F)
2004
35.6 C (96.1 F)
2005
40.0 C (104.0 F)
2006
39.4 C (102.9 F)
2007
41.1 C (106.0 F)
2008
37.8 C (100.0 F)
2009
37.2 C (99.0 F)
2010
40.0 C (104.0 F)
2011
38.9 C (102.0 F)
2012
39.4 C (102.9 F)
2013
37.8 C (100.0 F)
2014
35.0 C (95.0 F)
2015
19.4 C (66.9 F)
Coldest night (TNn)
The coldest night of the year at Charleston, 1910 to 2015. The record is -22.2 C (-8.0 F) in 1966, marked on the chart; the median year is -10.6 C (12.9 F).
Coldest night (TNn) at Charleston by year
Year
Coldest night (TNn)
1910
n/a
1911
-11.1 C (12.0 F)
1912
-17.2 C (1.0 F)
1913
-7.2 C (19.0 F)
1914
-12.8 C (9.0 F)
1915
-7.8 C (18.0 F)
1916
-11.7 C (10.9 F)
1917
-12.8 C (9.0 F)
1918
-15.6 C (3.9 F)
1919
-8.9 C (16.0 F)
1920
-7.2 C (19.0 F)
1921
-6.1 C (21.0 F)
1922
-5.6 C (21.9 F)
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
-9.4 C (15.1 F)
1952
-8.3 C (17.1 F)
1953
-9.4 C (15.1 F)
1954
-7.8 C (18.0 F)
1955
-11.1 C (12.0 F)
1956
-7.8 C (18.0 F)
1957
-10.0 C (14.0 F)
1958
-14.4 C (6.1 F)
1959
-12.8 C (9.0 F)
1960
-11.1 C (12.0 F)
1961
-10.6 C (12.9 F)
1962
-21.7 C (-7.1 F)
1963
-20.0 C (-4.0 F)
1964
-10.6 C (12.9 F)
1965
-12.8 C (9.0 F)
1966
-22.2 C (-8.0 F)
1967
-9.4 C (15.1 F)
1968
-10.0 C (14.0 F)
1969
-10.0 C (14.0 F)
1970
-13.9 C (7.0 F)
1971
-12.8 C (9.0 F)
1972
-12.8 C (9.0 F)
1973
-9.4 C (15.1 F)
1974
-8.3 C (17.1 F)
1975
-9.4 C (15.1 F)
1976
-12.2 C (10.0 F)
1977
-16.7 C (1.9 F)
1978
-10.6 C (12.9 F)
1979
-13.9 C (7.0 F)
1980
-12.2 C (10.0 F)
1981
-11.7 C (10.9 F)
1982
-16.1 C (3.0 F)
1988
-7.2 C (19.0 F)
1989
-19.4 C (-2.9 F)
1990
-10.0 C (14.0 F)
1991
-9.4 C (15.1 F)
1992
-10.6 C (12.9 F)
1993
-8.9 C (16.0 F)
1994
-12.8 C (9.0 F)
1995
-10.6 C (12.9 F)
1996
-15.0 C (5.0 F)
1997
-11.7 C (10.9 F)
1998
-7.8 C (18.0 F)
1999
-12.8 C (9.0 F)
2000
-11.1 C (12.0 F)
2001
-6.7 C (19.9 F)
2002
-9.4 C (15.1 F)
2003
-12.8 C (9.0 F)
2004
-10.0 C (14.0 F)
2005
-8.3 C (17.1 F)
2006
-10.0 C (14.0 F)
2007
-12.2 C (10.0 F)
2008
-9.4 C (15.1 F)
2009
-10.0 C (14.0 F)
2010
-11.7 C (10.9 F)
2011
-13.9 C (7.0 F)
2012
-5.6 C (21.9 F)
2013
-7.2 C (19.0 F)
2014
-13.9 C (7.0 F)
2015
-13.3 C (8.1 F)
Wettest day (Rx1day)
The wettest day of the year at Charleston, 1910 to 2015. The record is 183.6 mm (7.2 in) in 2001, marked on the chart; the median year is 86.5 mm (3.4 in).
Wettest day (Rx1day) at Charleston by year
Year
Wettest day (Rx1day)
1910
107.4 mm (4.2 in)
1911
146.6 mm (5.8 in)
1912
55.9 mm (2.2 in)
1913
81.3 mm (3.2 in)
1914
71.1 mm (2.8 in)
1915
116.8 mm (4.6 in)
1916
69.1 mm (2.7 in)
1917
77.5 mm (3.1 in)
1918
78.7 mm (3.1 in)
1919
160.0 mm (6.3 in)
1920
88.9 mm (3.5 in)
1921
60.5 mm (2.4 in)
1922
96.5 mm (3.8 in)
1940
57.2 mm (2.3 in)
1941
50.8 mm (2.0 in)
1942
104.6 mm (4.1 in)
1943
83.8 mm (3.3 in)
1944
80.5 mm (3.2 in)
1945
86.1 mm (3.4 in)
1946
78.7 mm (3.1 in)
1947
73.7 mm (2.9 in)
1948
165.1 mm (6.5 in)
1949
96.5 mm (3.8 in)
1950
80.0 mm (3.1 in)
1951
101.6 mm (4.0 in)
1952
62.5 mm (2.5 in)
1953
87.6 mm (3.4 in)
1954
59.7 mm (2.4 in)
1955
104.1 mm (4.1 in)
1956
110.0 mm (4.3 in)
1957
95.3 mm (3.8 in)
1958
103.4 mm (4.1 in)
1959
89.7 mm (3.5 in)
1960
41.9 mm (1.6 in)
1961
95.3 mm (3.8 in)
1962
87.9 mm (3.5 in)
1963
89.4 mm (3.5 in)
1964
62.5 mm (2.5 in)
1965
53.3 mm (2.1 in)
1966
106.7 mm (4.2 in)
1967
84.3 mm (3.3 in)
1968
151.1 mm (5.9 in)
1969
101.9 mm (4.0 in)
1970
80.3 mm (3.2 in)
1971
101.1 mm (4.0 in)
1972
87.9 mm (3.5 in)
1973
137.2 mm (5.4 in)
1974
82.6 mm (3.3 in)
1975
95.0 mm (3.7 in)
1976
67.3 mm (2.6 in)
1977
103.1 mm (4.1 in)
1978
94.0 mm (3.7 in)
1979
76.7 mm (3.0 in)
1980
165.1 mm (6.5 in)
1981
78.7 mm (3.1 in)
1982
137.2 mm (5.4 in)
1988
70.6 mm (2.8 in)
1989
86.4 mm (3.4 in)
1990
78.7 mm (3.1 in)
1991
150.6 mm (5.9 in)
1992
84.8 mm (3.3 in)
1993
62.2 mm (2.4 in)
1994
71.1 mm (2.8 in)
1995
68.8 mm (2.7 in)
1996
50.8 mm (2.0 in)
1997
56.1 mm (2.2 in)
1998
53.6 mm (2.1 in)
1999
82.6 mm (3.3 in)
2000
69.1 mm (2.7 in)
2001
183.6 mm (7.2 in)
2002
107.2 mm (4.2 in)
2003
112.5 mm (4.4 in)
2004
82.0 mm (3.2 in)
2005
93.2 mm (3.7 in)
2006
68.3 mm (2.7 in)
2007
105.9 mm (4.2 in)
2008
96.0 mm (3.8 in)
2009
108.2 mm (4.3 in)
2010
63.8 mm (2.5 in)
2011
120.9 mm (4.8 in)
2012
125.0 mm (4.9 in)
2013
86.6 mm (3.4 in)
2014
150.1 mm (5.9 in)
2015
19.1 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Charleston, 1910 to 2015. The record is 348.9 mm (13.7 in) in 2001, marked on the chart; the median year is 132.9 mm (5.2 in).
Wettest five days (Rx5day) at Charleston by year
Year
Wettest five days (Rx5day)
1910
196.5 mm (7.7 in)
1911
211.8 mm (8.3 in)
1912
108.7 mm (4.3 in)
1913
133.9 mm (5.3 in)
1914
107.9 mm (4.2 in)
1915
132.0 mm (5.2 in)
1916
99.1 mm (3.9 in)
1917
133.4 mm (5.3 in)
1918
107.9 mm (4.2 in)
1919
173.9 mm (6.8 in)
1920
132.9 mm (5.2 in)
1921
94.5 mm (3.7 in)
1922
177.1 mm (7.0 in)
1940
104.7 mm (4.1 in)
1941
80.5 mm (3.2 in)
1942
123.9 mm (4.9 in)
1943
89.1 mm (3.5 in)
1944
175.7 mm (6.9 in)
1945
196.7 mm (7.7 in)
1946
166.3 mm (6.5 in)
1947
125.3 mm (4.9 in)
1948
221.7 mm (8.7 in)
1949
106.7 mm (4.2 in)
1950
149.9 mm (5.9 in)
1951
127.5 mm (5.0 in)
1952
70.1 mm (2.8 in)
1953
141.0 mm (5.6 in)
1954
154.9 mm (6.1 in)
1955
195.9 mm (7.7 in)
1956
229.9 mm (9.1 in)
1957
174.8 mm (6.9 in)
1958
221.3 mm (8.7 in)
1959
130.8 mm (5.1 in)
1960
85.8 mm (3.4 in)
1961
209.6 mm (8.3 in)
1962
104.2 mm (4.1 in)
1963
151.6 mm (6.0 in)
1964
134.4 mm (5.3 in)
1965
161.5 mm (6.4 in)
1966
155.5 mm (6.1 in)
1967
119.2 mm (4.7 in)
1968
194.0 mm (7.6 in)
1969
154.7 mm (6.1 in)
1970
135.5 mm (5.3 in)
1971
123.9 mm (4.9 in)
1972
117.8 mm (4.6 in)
1973
212.6 mm (8.4 in)
1974
160.9 mm (6.3 in)
1975
159.6 mm (6.3 in)
1976
115.8 mm (4.6 in)
1977
153.2 mm (6.0 in)
1978
118.1 mm (4.6 in)
1979
133.1 mm (5.2 in)
1980
214.6 mm (8.4 in)
1981
90.7 mm (3.6 in)
1982
180.6 mm (7.1 in)
1988
79.0 mm (3.1 in)
1989
183.8 mm (7.2 in)
1990
135.4 mm (5.3 in)
1991
219.1 mm (8.6 in)
1992
158.5 mm (6.2 in)
1993
111.3 mm (4.4 in)
1994
99.4 mm (3.9 in)
1995
131.5 mm (5.2 in)
1996
93.0 mm (3.7 in)
1997
151.6 mm (6.0 in)
1998
102.1 mm (4.0 in)
1999
129.5 mm (5.1 in)
2000
163.0 mm (6.4 in)
2001
348.9 mm (13.7 in)
2002
193.3 mm (7.6 in)
2003
206.2 mm (8.1 in)
2004
89.6 mm (3.5 in)
2005
119.1 mm (4.7 in)
2006
83.8 mm (3.3 in)
2007
130.7 mm (5.1 in)
2008
66.8 mm (2.6 in)
2009
114.6 mm (4.5 in)
2010
71.4 mm (2.8 in)
2011
76.8 mm (3.0 in)
2012
84.6 mm (3.3 in)
2013
103.6 mm (4.1 in)
2014
89.4 mm (3.5 in)
2015
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Charleston, 1910 to 2015. The record is 43 days in 1920, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Charleston by year
Year
Longest dry spell (CDD)
1910
34 days
1911
27 days
1912
25 days
1913
20 days
1914
36 days
1915
27 days
1916
21 days
1917
32 days
1918
26 days
1919
25 days
1920
43 days
1921
23 days
1922
11 days
1940
28 days
1941
25 days
1942
41 days
1943
22 days
1944
27 days
1945
26 days
1946
23 days
1947
27 days
1948
22 days
1949
20 days
1950
14 days
1951
28 days
1952
31 days
1953
37 days
1954
19 days
1955
18 days
1956
18 days
1957
16 days
1958
21 days
1959
20 days
1960
13 days
1961
30 days
1962
27 days
1963
34 days
1964
21 days
1965
29 days
1966
14 days
1967
19 days
1968
16 days
1969
20 days
1970
21 days
1971
18 days
1972
23 days
1973
22 days
1974
19 days
1975
13 days
1976
20 days
1977
16 days
1978
17 days
1979
15 days
1980
24 days
1981
30 days
1982
16 days
1988
42 days
1989
20 days
1990
22 days
1991
20 days
1992
17 days
1993
33 days
1994
14 days
1995
12 days
1996
17 days
1997
17 days
1998
27 days
1999
22 days
2000
40 days
2001
25 days
2002
17 days
2003
6 days
2004
5 days
2005
5 days
2006
5 days
2007
5 days
2008
9 days
2009
13 days
2010
18 days
2011
17 days
2012
18 days
2013
4 days
2014
5 days
2015
3 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Charleston falls on 5 April and the median first autumn frost on 28 October, which leaves a median of 209 days between them.
Fitted over all years, the growing season changes by +1.5 days per decade at this station.
Frost dates and growing season at Charleston
Measure
Median, all years
Earliest period
Recent period (1952 to 2000)
Recent against earliest
Fitted trend
Last spring frost
5 April
n/a
3 April
n/a
-1.3 days per decade
First autumn frost
28 October
n/a
29 October
n/a
+0.3 days per decade
Growing days
209 days
n/a
211 days
n/a
+1.5 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
55 years, 1911 to 1999
A day with at least 84.7 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 190.0 mm (7.5 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 in
A day with at least
Note
2 years
84.7 mm (3.3 in)
5 years
110.7 mm (4.4 in)
10 years
128.8 mm (5.1 in)
25 years
152.7 mm (6.0 in)
50 years
171.1 mm (6.7 in)
100 years
190.0 mm (7.5 in)
Longer than the 55 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, 55 years of values from 1911 to 1999.
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 1948; 165.1 mm (6.5 in) in 1980; 160.0 mm (6.3 in) in 1919.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.