Summerville Weather Records (USC00098436)

Record envelope, standing records and threshold days for Summerville (USC00098436), Georgia, United States, with 90 years of record.

Key Facts for Summerville

Summerville (USC00098436) is a weather station in Georgia, United States at 34.45 latitude and -85.39 longitude, 195 m (639 ft) above sea level.
The station reports from 1937 to 2026, 90 years of record.
1,464 records set at Summerville still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Summerville tied a daily record precipitation of 37.8 mm (1.5 in) on 14 July 2026.

About the Station

Location: Georgia, United States, 34.45 latitude, -85.39 longitude.
Elevation: 195 m (639 ft).
Period of record: 1937 to 2026, 90 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

21 days at or beyond a record

The band shows the record high and record low for each calendar day at Summerville. The lines show the 2026 daily maximum and minimum. 21 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Summerville, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	26.1 C (79.0 F)	-14.4 C (6.1 F)	21.1 C (70.0 F)	-12.8 C (9.0 F)
Feb	28.9 C (84.0 F)	-13.3 C (8.1 F)	25.6 C (78.1 F)	-8.9 C (16.0 F)
Mar	31.1 C (88.0 F)	-8.3 C (17.1 F)	28.9 C (84.0 F)	-3.9 C (25.0 F)
Apr	33.3 C (91.9 F)	-4.4 C (24.1 F)	28.9 C (84.0 F)	3.3 C (37.9 F)
May	36.1 C (97.0 F)	1.1 C (34.0 F)	31.7 C (89.1 F)	2.8 C (37.0 F)
Jun	38.9 C (102.0 F)	8.9 C (48.0 F)	33.9 C (93.0 F)	11.1 C (52.0 F)
Jul	40.0 C (104.0 F)	10.0 C (50.0 F)	36.7 C (98.1 F)	16.1 C (61.0 F)
Aug	37.8 C (100.0 F)	10.0 C (50.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	4.4 C (39.9 F)	29.4 C (84.9 F)	7.2 C (45.0 F)
Oct	36.7 C (98.1 F)	-3.3 C (26.1 F)	n/a	n/a
Nov	30.6 C (87.1 F)	-11.1 C (12.0 F)	n/a	n/a
Dec	25.6 C (78.1 F)	-13.3 C (8.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Summerville still stand. 2010 holds the most, with 105.

Standing records at Summerville by the year they were set
Year set	Standing records
2001	5
2002	66
2003	41
2004	46
2005	61
2006	83
2007	61
2008	74
2009	61
2010	105
2011	77
2012	73
2013	45
2014	20
2015	46
2016	55
2017	88
2018	69
2019	51
2020	59
2021	46
2022	50
2023	57
2024	41
2025	56
2026	28

All-Time Record Progression

3 new records

3 all-time records were set at Summerville between 4 January 1982 and 4 September 2022. Each dot is a new record.

When Summerville set new all-time records
Date	Kind	Detail
1982-01-04	Record daily precipitation	Record daily precipitation 165.6 mm (6.5 in)
1990-02-16	Record daily precipitation	Record daily precipitation 261.6 mm (10.3 in)
2022-09-04	Record daily precipitation	Record daily precipitation 317.5 mm (12.5 in)

Wettest Day of Each Month

Sep: 317.5 mm (12.5 in)

The wettest day on record for each calendar month at Summerville. The most was 317.5 mm (12.5 in) on 4 September 2022.

Record daily precipitation for each month at Summerville
Month	Record daily precipitation (mm)	Date
Jan	165.6 mm (6.5 in)	4 January 1982
Feb	261.6 mm (10.3 in)	16 February 1990
Mar	153.4 mm (6.0 in)	29 March 1951
Apr	129.0 mm (5.1 in)	13 April 2020
May	118.1 mm (4.6 in)	16 May 2003
Jun	135.1 mm (5.3 in)	20 June 2021
Jul	72.1 mm (2.8 in)	18 July 1953
Aug	83.8 mm (3.3 in)	28 August 2002
Sep	317.5 mm (12.5 in)	4 September 2022
Oct	143.5 mm (5.6 in)	3 October 1962
Nov	107.7 mm (4.2 in)	2 November 1992
Dec	128.3 mm (5.1 in)	12 December 1961

Period of Record Coverage

2001 to 2026

26 years of record at Summerville, 2001 to 2026. 13 years have data for under 90 percent of days and are left out of rankings: 2001, 2002, 2003, 2004, 2005, 2007, 2009, 2013 and others.

Days with data per year at Summerville
Year	Days with data	Share of year	Complete
2001	19	5%	No
2002	259	71%	No
2003	254	70%	No
2004	256	70%	No
2005	285	78%	No
2006	362	99%	Yes
2007	312	85%	No
2008	357	98%	Yes
2009	303	83%	No
2010	365	100%	Yes
2011	365	100%	Yes
2012	352	96%	Yes
2013	211	58%	No
2014	122	33%	No
2015	240	66%	No
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	294	81%	No
2020	364	99%	Yes
2021	364	100%	Yes
2022	362	99%	Yes
2023	362	99%	Yes
2024	340	93%	Yes
2025	303	83%	No
2026	195	53%	No

Latest Records

Latest records at Summerville
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
14 July 2026	Summerville, US	daily rain (Tie)	37.8 mm (1.5 in)	tie	59 years	6 of 100 (Routine)
8 June 2026	Summerville, US	daily rain	54.6 mm (2.1 in)	6.6 mm (0.26 in)	48 years	27 of 100 (Routine)
3 August 2025	Summerville, US	daily rain	75.4 mm (3.0 in)	20.5 mm (0.8 in)	76 years	44 of 100 (Notable)
1 August 2025	Summerville, US	daily rain	80.0 mm (3.1 in)	35.5 mm (1.4 in)	36 years	43 of 100 (Notable)
13 May 2025	Summerville, US	daily rain	55.1 mm (2.2 in)	1.8 mm (0.07 in)	59 years	26 of 100 (Routine)
7 April 2025	Summerville, US	daily rain	83.8 mm (3.3 in)	54.8 mm (2.2 in)	87 years	65 of 100 (Major)
20 November 2024	Summerville, US	daily rain	62.2 mm (2.4 in)	9.9 mm (0.39 in)	9 years	15 of 100 (Routine)
27 September 2024	Summerville, US	daily rain	77.5 mm (3.1 in)	13.5 mm (0.5 in)	82 years	37 of 100 (Notable)
6 July 2024	Summerville, US	daily rain	38.6 mm (1.5 in)	6.8 mm (0.27 in)	32 years	21 of 100 (Routine)
9 January 2024	Summerville, US	daily rain	82.6 mm (3.3 in)	44.2 mm (1.7 in)	60 years	52 of 100 (Notable)
29 August 2023	Summerville, US	daily rain	48.3 mm (1.9 in)	28.0 mm (1.1 in)	48 years	42 of 100 (Notable)
6 December 2022	Summerville, US	daily rain	69.6 mm (2.7 in)	29.5 mm (1.2 in)	8 years	27 of 100 (Routine)
30 November 2022	Summerville, US	daily rain	71.4 mm (2.8 in)	18.8 mm (0.7 in)	25 years	26 of 100 (Routine)
4 September 2022	Summerville, US	all-time rain	317.5 mm (12.5 in)	55.9 mm (2.2 in)	32 years	66 of 100 (Major)
23 March 2022	Summerville, US	daily rain	43.7 mm (1.7 in)	0.3 mm (0.01 in)	73 years	30 of 100 (Routine)
31 August 2021	Summerville, US	daily rain	66.0 mm (2.6 in)	18.8 mm (0.7 in)	62 years	39 of 100 (Notable)
18 August 2021	Summerville, US	daily rain	56.6 mm (2.2 in)	22.3 mm (0.9 in)	44 years	37 of 100 (Notable)
16 August 2021	Summerville, US	daily rain	34.8 mm (1.4 in)	1.3 mm (0.05 in)	68 years	28 of 100 (Routine)
20 June 2021	Summerville, US	monthly rain	135.1 mm (5.3 in)	32.7 mm (1.3 in)	32 years	50 of 100 (Notable)
5 May 2021	Summerville, US	daily rain	81.3 mm (3.2 in)	21.6 mm (0.9 in)	2 years	21 of 100 (Routine)

Climate Trend

12 complete years, 2004 to 2023

One stripe for each of 12 complete years at Summerville, 2004 to 2023. Blue stripes are years cooler than the station's own mean of 15.8 C (60.4 F); red stripes are warmer. The coolest year was 2008, at 14.8 C (58.6 F), and the warmest was 2004, at 16.4 C (61.5 F). The strongest colour marks a difference of 1.0 C (1.8 F).

Annual mean temperature at Summerville as warming stripes, 2004 to 2023
Year	Annual mean temperature	Difference from the station mean
2004	16.4 C	+0.63 C
2008	14.8 C	-0.99 C
2010	15.0 C	-0.73 C
2011	15.5 C	-0.27 C
2012	16.2 C	+0.42 C
2016	16.3 C	+0.57 C
2017	16.0 C	+0.28 C
2018	15.7 C	-0.03 C
2020	15.9 C	+0.18 C
2021	15.6 C	-0.16 C
2022	15.5 C	-0.27 C
2023	16.1 C	+0.33 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1937 to 2026

Yearly extremes at Summerville: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	2012	36.1 C (97.0 F)	26
Coldest night (TNn)	-14.4 C (6.1 F)	2010	-10.6 C (12.9 F)	26
Wettest day (Rx1day)	317.5 mm (12.5 in)	2022	80.6 mm (3.2 in)	90
Wettest five days (Rx5day)	352.8 mm (13.9 in)	2022	138.3 mm (5.4 in)	90
Longest dry spell (CDD)	53 days	1978	21 days	90

Hottest day (TXx)

The hottest day of the year at Summerville, 1937 to 2026. The record is 40.0 C (104.0 F) in 2012, marked on the chart; the median year is 36.1 C (97.0 F).

Hottest day (TXx) at Summerville by year
Year	Hottest day (TXx)
1937	n/a
1938	n/a
1939	n/a
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	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	22.8 C (73.0 F)
2002	37.2 C (99.0 F)
2003	34.4 C (93.9 F)
2004	35.0 C (95.0 F)
2005	37.2 C (99.0 F)
2006	38.3 C (100.9 F)
2007	35.6 C (96.1 F)
2008	36.1 C (97.0 F)
2009	36.1 C (97.0 F)
2010	37.8 C (100.0 F)
2011	37.2 C (99.0 F)
2012	40.0 C (104.0 F)
2013	33.9 C (93.0 F)
2014	32.8 C (91.0 F)
2015	37.2 C (99.0 F)
2016	37.8 C (100.0 F)
2017	35.6 C (96.1 F)
2018	35.0 C (95.0 F)
2019	36.7 C (98.1 F)
2020	34.4 C (93.9 F)
2021	34.4 C (93.9 F)
2022	36.1 C (97.0 F)
2023	36.1 C (97.0 F)
2024	36.7 C (98.1 F)
2025	36.7 C (98.1 F)
2026	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Summerville, 1937 to 2026. The record is -14.4 C (6.1 F) in 2010, marked on the chart; the median year is -10.6 C (12.9 F).

Coldest night (TNn) at Summerville by year
Year	Coldest night (TNn)
1937	n/a
1938	n/a
1939	n/a
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	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	-10.0 C (14.0 F)
2002	-11.1 C (12.0 F)
2003	-13.3 C (8.1 F)
2004	-9.4 C (15.1 F)
2005	-10.0 C (14.0 F)
2006	-10.6 C (12.9 F)
2007	-10.0 C (14.0 F)
2008	-12.8 C (9.0 F)
2009	-13.9 C (7.0 F)
2010	-14.4 C (6.1 F)
2011	-13.9 C (7.0 F)
2012	-9.4 C (15.1 F)
2013	-9.4 C (15.1 F)
2014	-10.6 C (12.9 F)
2015	-6.1 C (21.0 F)
2016	-10.6 C (12.9 F)
2017	-13.3 C (8.1 F)
2018	-13.3 C (8.1 F)
2019	-8.9 C (16.0 F)
2020	-9.4 C (15.1 F)
2021	-7.2 C (19.0 F)
2022	-13.3 C (8.1 F)
2023	-7.2 C (19.0 F)
2024	-14.4 C (6.1 F)
2025	-13.3 C (8.1 F)
2026	-12.8 C (9.0 F)

Wettest day (Rx1day)

The wettest day of the year at Summerville, 1937 to 2026. The record is 317.5 mm (12.5 in) in 2022, marked on the chart; the median year is 80.6 mm (3.2 in).

Wettest day (Rx1day) at Summerville by year
Year	Wettest day (Rx1day)
1937	48.8 mm (1.9 in)
1938	102.9 mm (4.1 in)
1939	59.2 mm (2.3 in)
1940	78.5 mm (3.1 in)
1941	65.8 mm (2.6 in)
1942	99.8 mm (3.9 in)
1943	91.2 mm (3.6 in)
1944	69.6 mm (2.7 in)
1945	84.3 mm (3.3 in)
1946	84.1 mm (3.3 in)
1947	80.8 mm (3.2 in)
1948	96.3 mm (3.8 in)
1949	101.6 mm (4.0 in)
1950	115.3 mm (4.5 in)
1951	153.4 mm (6.0 in)
1952	84.8 mm (3.3 in)
1953	72.1 mm (2.8 in)
1954	97.8 mm (3.9 in)
1955	66.8 mm (2.6 in)
1956	73.9 mm (2.9 in)
1957	77.7 mm (3.1 in)
1958	61.5 mm (2.4 in)
1959	73.2 mm (2.9 in)
1960	62.2 mm (2.4 in)
1961	128.3 mm (5.1 in)
1962	143.5 mm (5.6 in)
1963	98.6 mm (3.9 in)
1964	124.2 mm (4.9 in)
1965	77.2 mm (3.0 in)
1966	117.1 mm (4.6 in)
1967	68.6 mm (2.7 in)
1968	68.3 mm (2.7 in)
1969	53.3 mm (2.1 in)
1970	68.6 mm (2.7 in)
1971	81.3 mm (3.2 in)
1972	79.5 mm (3.1 in)
1973	61.7 mm (2.4 in)
1974	51.3 mm (2.0 in)
1975	64.0 mm (2.5 in)
1976	50.8 mm (2.0 in)
1977	79.2 mm (3.1 in)
1978	71.1 mm (2.8 in)
1979	135.9 mm (5.4 in)
1980	105.2 mm (4.1 in)
1981	75.2 mm (3.0 in)
1982	165.6 mm (6.5 in)
1983	96.5 mm (3.8 in)
1984	60.2 mm (2.4 in)
1985	61.7 mm (2.4 in)
1986	53.6 mm (2.1 in)
1987	99.6 mm (3.9 in)
1988	80.3 mm (3.2 in)
1989	102.4 mm (4.0 in)
1990	261.6 mm (10.3 in)
1991	78.0 mm (3.1 in)
1992	107.7 mm (4.2 in)
1993	80.0 mm (3.1 in)
1994	79.0 mm (3.1 in)
1995	132.1 mm (5.2 in)
1996	114.3 mm (4.5 in)
1997	100.3 mm (3.9 in)
1998	100.1 mm (3.9 in)
1999	61.2 mm (2.4 in)
2000	86.4 mm (3.4 in)
2001	50.8 mm (2.0 in)
2002	91.4 mm (3.6 in)
2003	118.1 mm (4.6 in)
2004	137.2 mm (5.4 in)
2005	50.8 mm (2.0 in)
2006	68.6 mm (2.7 in)
2007	56.1 mm (2.2 in)
2008	90.2 mm (3.6 in)
2009	109.2 mm (4.3 in)
2010	76.2 mm (3.0 in)
2011	141.0 mm (5.6 in)
2012	63.5 mm (2.5 in)
2013	73.9 mm (2.9 in)
2014	71.1 mm (2.8 in)
2015	99.6 mm (3.9 in)
2016	57.7 mm (2.3 in)
2017	73.4 mm (2.9 in)
2018	109.7 mm (4.3 in)
2019	112.3 mm (4.4 in)
2020	129.0 mm (5.1 in)
2021	135.1 mm (5.3 in)
2022	317.5 mm (12.5 in)
2023	67.3 mm (2.6 in)
2024	82.6 mm (3.3 in)
2025	83.8 mm (3.3 in)
2026	59.7 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Summerville, 1937 to 2026. The record is 352.8 mm (13.9 in) in 2022, marked on the chart; the median year is 138.3 mm (5.4 in).

Wettest five days (Rx5day) at Summerville by year
Year	Wettest five days (Rx5day)
1937	71.7 mm (2.8 in)
1938	142.8 mm (5.6 in)
1939	112.8 mm (4.4 in)
1940	108.1 mm (4.3 in)
1941	105.4 mm (4.1 in)
1942	150.6 mm (5.9 in)
1943	136.9 mm (5.4 in)
1944	143.0 mm (5.6 in)
1945	94.5 mm (3.7 in)
1946	181.7 mm (7.2 in)
1947	176.3 mm (6.9 in)
1948	190.5 mm (7.5 in)
1949	162.6 mm (6.4 in)
1950	160.8 mm (6.3 in)
1951	184.7 mm (7.3 in)
1952	146.8 mm (5.8 in)
1953	156.2 mm (6.1 in)
1954	121.7 mm (4.8 in)
1955	120.9 mm (4.8 in)
1956	113.0 mm (4.4 in)
1957	168.1 mm (6.6 in)
1958	124.5 mm (4.9 in)
1959	97.1 mm (3.8 in)
1960	110.4 mm (4.3 in)
1961	197.6 mm (7.8 in)
1962	148.3 mm (5.8 in)
1963	182.9 mm (7.2 in)
1964	124.2 mm (4.9 in)
1965	136.7 mm (5.4 in)
1966	155.0 mm (6.1 in)
1967	121.2 mm (4.8 in)
1968	108.9 mm (4.3 in)
1969	140.7 mm (5.5 in)
1970	113.7 mm (4.5 in)
1971	103.1 mm (4.1 in)
1972	135.9 mm (5.4 in)
1973	112.6 mm (4.4 in)
1974	107.4 mm (4.2 in)
1975	118.1 mm (4.6 in)
1976	101.6 mm (4.0 in)
1977	127.9 mm (5.0 in)
1978	112.2 mm (4.4 in)
1979	160.6 mm (6.3 in)
1980	158.0 mm (6.2 in)
1981	89.2 mm (3.5 in)
1982	215.2 mm (8.5 in)
1983	151.1 mm (5.9 in)
1984	106.4 mm (4.2 in)
1985	89.2 mm (3.5 in)
1986	95.8 mm (3.8 in)
1987	157.8 mm (6.2 in)
1988	112.3 mm (4.4 in)
1989	309.1 mm (12.2 in)
1990	297.5 mm (11.7 in)
1991	133.7 mm (5.3 in)
1992	182.9 mm (7.2 in)
1993	144.7 mm (5.7 in)
1994	181.8 mm (7.2 in)
1995	175.8 mm (6.9 in)
1996	146.1 mm (5.8 in)
1997	152.1 mm (6.0 in)
1998	159.2 mm (6.3 in)
1999	78.2 mm (3.1 in)
2000	140.0 mm (5.5 in)
2001	101.6 mm (4.0 in)
2002	152.8 mm (6.0 in)
2003	142.2 mm (5.6 in)
2004	137.2 mm (5.4 in)
2005	90.9 mm (3.6 in)
2006	139.7 mm (5.5 in)
2007	75.9 mm (3.0 in)
2008	142.5 mm (5.6 in)
2009	156.4 mm (6.2 in)
2010	104.7 mm (4.1 in)
2011	176.6 mm (7.0 in)
2012	87.1 mm (3.4 in)
2013	138.9 mm (5.5 in)
2014	88.4 mm (3.5 in)
2015	166.4 mm (6.6 in)
2016	91.3 mm (3.6 in)
2017	114.0 mm (4.5 in)
2018	187.2 mm (7.4 in)
2019	172.5 mm (6.8 in)
2020	137.7 mm (5.4 in)
2021	168.2 mm (6.6 in)
2022	352.8 mm (13.9 in)
2023	105.7 mm (4.2 in)
2024	123.0 mm (4.8 in)
2025	163.8 mm (6.4 in)
2026	85.6 mm (3.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Summerville, 1937 to 2026. The record is 53 days in 1978, marked on the chart; the median year is 21 days.

Longest dry spell (CDD) at Summerville by year
Year	Longest dry spell (CDD)
1937	24 days
1938	35 days
1939	25 days
1940	24 days
1941	21 days
1942	18 days
1943	25 days
1944	27 days
1945	16 days
1946	22 days
1947	15 days
1948	20 days
1949	11 days
1950	15 days
1951	23 days
1952	30 days
1953	30 days
1954	21 days
1955	24 days
1956	21 days
1957	21 days
1958	27 days
1959	20 days
1960	18 days
1961	17 days
1962	15 days
1963	33 days
1964	18 days
1965	18 days
1966	19 days
1967	23 days
1968	26 days
1969	24 days
1970	24 days
1971	20 days
1972	22 days
1973	27 days
1974	25 days
1975	22 days
1976	36 days
1977	29 days
1978	53 days
1979	16 days
1980	24 days
1981	23 days
1982	22 days
1983	20 days
1984	27 days
1985	27 days
1986	27 days
1987	28 days
1988	24 days
1989	21 days
1990	34 days
1991	24 days
1992	20 days
1993	19 days
1994	17 days
1995	26 days
1996	15 days
1997	35 days
1998	25 days
1999	27 days
2000	21 days
2001	29 days
2002	16 days
2003	18 days
2004	24 days
2005	24 days
2006	17 days
2007	40 days
2008	19 days
2009	18 days
2010	20 days
2011	26 days
2012	21 days
2013	12 days
2014	13 days
2015	14 days
2016	29 days
2017	15 days
2018	13 days
2019	16 days
2020	16 days
2021	16 days
2022	18 days
2023	20 days
2024	17 days
2025	18 days
2026	14 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

76 years, 1938 to 2024

A day with at least 81.9 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 253.2 mm (10.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Summerville: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	81.9 mm (3.2 in)
5 years	111.1 mm (4.4 in)
10 years	135.8 mm (5.3 in)
25 years	174.7 mm (6.9 in)
50 years	210.5 mm (8.3 in)
100 years	253.2 mm (10.0 in)	Longer than the 76 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, 76 years of values from 1938 to 2024.

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: 317.5 mm (12.5 in) in 2022; 261.6 mm (10.3 in) in 1990; 165.6 mm (6.5 in) in 1982.

Download the Data

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

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).