Simpsonville climate — normals and trends

Q: What is the climate of Simpsonville?

Simpsonville has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.9 °C and it receives 1,182 mm of precipitation per year.

Q: What is the hottest day ever recorded in Simpsonville?

The hottest day measured in Simpsonville between 1940 and 2025 was 1 July 2012, reaching 40.4 °C.

Q: What is the coldest day in Simpsonville?

The coldest day measured in Simpsonville between 1940 and 2025 was 27 January 1940, at -21.2 °C.

Q: Does it snow in Simpsonville?

Yes. Simpsonville gets on average 10.8 cm of snow per year and has around 49 frost days.

Q: Has the climate of Simpsonville warmed?

Yes: Simpsonville warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Simpsonville?

The wettest day measured in Simpsonville between 1940 and 2025 was 17 September 2020, with 132 mm of rain in 24 hours.

Q: What was the windiest day in Simpsonville?

The windiest day measured in Simpsonville between 1940 and 2025 was 27 September 2024, with winds reaching 50.0 km/h.

Q: What is the warmest month in Simpsonville?

The warmest month in Simpsonville is July (25.9 °C on average); the coldest is January (5.3 °C).

Q: How much does it rain in Simpsonville?

Simpsonville receives on average 1,182 mm of precipitation per year, spread over about 123 rainy days.

Q: Is it sunny in Simpsonville?

Simpsonville gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

Simpsonville (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.9 °C and it receives 1,182 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is July (25.9 °C on average) and the coldest is January (5.3 °C). Rainfall peaks in March.

Simpsonville averages 49 frost days, 70 hot days (≥ 30 °C) and 123 rainy days per year.

Simpsonville has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.

The number of frost days there went from about 54 to 44 per year over the period.

The hottest day of the period reached 40.4 °C (on 1 July 2012) and the coldest -21.2 °C (on 27 January 1940).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

SimpsonvilleSouth Carolina

coords: 34.74°, -82.25°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthMarchDriest monthOctober

Mean daily temperature

15.9°C

Average daily high

21.6°C

Average daily low

10.9°C

Annual rainfall

1,182mm

Sunshine / day

9.0h

Mean relative humidity

71%

Average peak wind

13.6km/h

Seasonal range

20.6°C

Frost days (< 0 °C)

49 d/yr

Hot days (≥ 30 °C)

70 d/yr

Rainy days (≥ 1 mm)

123 d/yr

Annual snowfall

10.8 cm

Average feels-like high

21.7 °C

Average feels-like low

9.8 °C

Average peak gust

32.3 km/h

Tropical nights (≥ 20 °C)

74 d/yr

Solar radiation

16.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.3 °C

since 1940

+0.2 °C per decade · r² = 0.28 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

40.4 °C

1 July 2012

Coldest day

-21.2 °C

27 January 1940

Wettest day

132 mm

17 September 2020

Windiest day

50.0 km/h

27 September 2024

Strongest gust

123.5 km/h

27 September 2024

Hottest feels-like

44.4 °C

30 June 2012

Coldest feels-like

-26.3 °C

27 January 1940

Snowiest day

28.8 cm

9 February 1948

Sunniest day

14.2 h

14 June 2019

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	36.2 °C27 July 2025	-8.8 °C23 January 2025	16.4 °C	1,154 mm	64	46
2024	36.0 °C26 June 2024	-8.9 °C21 January 2024	17.0 °C	1,272 mm	75	41
2023	36.5 °C26 August 2023	-5.6 °C29 November 2023	17.1 °C	1,052 mm	69	30
2022	37.5 °C15 June 2022	-13.5 °C24 December 2022	16.5 °C	1,225 mm	80	45
2021	35.1 °C13 August 2021	-4.2 °C24 November 2021	16.9 °C	1,147 mm	80	29
2020	35.0 °C19 July 2020	-7.1 °C26 December 2020	17.1 °C	1,655 mm	75	28
2019	36.1 °C3 October 2019	-5.6 °C21 January 2019	17.5 °C	1,222 mm	111	28
2018	33.8 °C25 June 2018	-12.4 °C2 January 2018	16.7 °C	1,514 mm	94	51
2017	35.8 °C23 July 2017	-7.5 °C8 January 2017	17.6 °C	1,211 mm	90	31
2016	37.9 °C8 July 2016	-8.9 °C24 January 2016	17.6 °C	878 mm	112	39
2015	37.1 °C10 July 2015	-12.1 °C20 February 2015	17.1 °C	1,230 mm	92	43
2014	35.2 °C22 August 2014	-14.5 °C7 January 2014	15.7 °C	1,045 mm	76	53
2013	33.6 °C12 June 2013	-5.4 °C2 February 2013	15.7 °C	1,317 mm	44	54
2012	40.4 °C1 July 2012	-7.0 °C4 January 2012	17.2 °C	1,018 mm	74	29
2011	38.2 °C3 August 2011	-8.7 °C13 January 2011	17.0 °C	971 mm	109	42
2010	38.6 °C25 July 2010	-10.0 °C9 January 2010	16.0 °C	947 mm	104	69
2009	35.0 °C10 August 2009	-10.4 °C17 January 2009	15.8 °C	1,417 mm	65	50
2008	38.3 °C10 June 2008	-7.7 °C3 January 2008	16.3 °C	1,015 mm	90	48
2007	38.7 °C10 August 2007	-7.3 °C29 January 2007	17.1 °C	823 mm	101	49
2006	36.9 °C22 June 2006	-9.8 °C9 December 2006	16.5 °C	998 mm	83	40
2005	35.6 °C27 July 2005	-9.3 °C24 January 2005	15.9 °C	1,267 mm	55	47
2004	35.2 °C14 July 2004	-8.7 °C20 December 2004	16.2 °C	1,071 mm	65	64
2003	33.4 °C27 August 2003	-9.6 °C24 January 2003	15.4 °C	1,461 mm	36	55
2002	37.6 °C24 August 2002	-8.8 °C4 January 2002	16.4 °C	1,218 mm	87	51
2001	33.5 °C17 June 2001	-7.9 °C3 January 2001	16.1 °C	884 mm	50	43
2000	36.5 °C11 July 2000	-10.8 °C1 February 2000	15.6 °C	898 mm	71	53
1999	37.7 °C18 August 1999	-9.4 °C5 January 1999	16.2 °C	908 mm	67	47
1998	37.1 °C27 June 1998	-7.2 °C13 March 1998	17.1 °C	1,117 mm	108	28
1997	35.7 °C3 July 1997	-8.2 °C18 January 1997	15.4 °C	1,182 mm	65	36
1996	36.0 °C23 June 1996	-13.4 °C5 February 1996	15.2 °C	1,280 mm	60	65
1995	37.5 °C23 July 1995	-11.5 °C9 February 1995	15.8 °C	1,356 mm	66	59
1994	33.7 °C22 June 1994	-14.3 °C19 January 1994	15.8 °C	1,341 mm	47	39
1993	38.2 °C29 July 1993	-9.1 °C15 March 1993	16.0 °C	1,103 mm	94	44
1992	37.8 °C12 July 1992	-5.9 °C9 February 1992	15.5 °C	1,509 mm	54	46
1991	35.1 °C24 July 1991	-12.2 °C16 February 1991	16.2 °C	1,283 mm	64	41
1990	36.3 °C30 June 1990	-5.6 °C25 December 1990	16.8 °C	1,348 mm	73	29
1989	34.2 °C1 June 1989	-11.1 °C23 December 1989	15.4 °C	1,554 mm	55	49
1988	37.0 °C15 July 1988	-14.9 °C12 January 1988	15.2 °C	913 mm	86	63
1987	36.1 °C24 July 1987	-6.2 °C23 January 1987	15.6 °C	1,264 mm	73	51
1986	39.6 °C19 July 1986	-14.1 °C28 January 1986	16.5 °C	1,023 mm	93	53
1985	36.9 °C1 June 1985	-19.5 °C21 January 1985	15.8 °C	1,221 mm	63	58
1984	35.7 °C19 June 1984	-8.3 °C22 January 1984	15.6 °C	1,277 mm	56	52
1983	38.9 °C21 August 1983	-14.8 °C25 December 1983	15.1 °C	1,365 mm	77	56
1982	33.0 °C20 July 1982	-16.2 °C11 January 1982	15.5 °C	1,387 mm	41	51
1981	37.4 °C22 June 1981	-12.3 °C12 January 1981	15.4 °C	930 mm	87	70
1980	38.5 °C17 July 1980	-12.5 °C3 March 1980	15.4 °C	1,196 mm	88	58
1979	35.8 °C9 August 1979	-11.9 °C19 February 1979	15.1 °C	1,280 mm	38	63
1978	37.7 °C28 June 1978	-12.1 °C11 January 1978	15.4 °C	1,171 mm	72	65
1977	38.7 °C8 July 1977	-14.6 °C17 January 1977	15.9 °C	1,212 mm	88	69
1976	34.4 °C24 July 1976	-12.3 °C19 January 1976	14.9 °C	1,237 mm	47	64
1975	35.0 °C4 September 1975	-9.3 °C19 December 1975	16.0 °C	1,365 mm	61	46
1974	33.6 °C22 June 1974	-8.3 °C26 February 1974	16.2 °C	1,160 mm	49	32
1973	33.9 °C22 July 1973	-12.0 °C13 January 1973	15.8 °C	1,334 mm	55	45
1972	34.8 °C22 July 1972	-11.2 °C16 January 1972	15.7 °C	1,095 mm	63	37
1971	35.4 °C6 June 1971	-9.5 °C10 February 1971	16.0 °C	1,169 mm	64	57
1970	36.3 °C1 July 1970	-15.0 °C9 January 1970	15.7 °C	1,077 mm	74	60
1969	35.2 °C19 July 1969	-11.2 °C6 January 1969	14.8 °C	1,124 mm	57	71
1968	36.5 °C24 August 1968	-7.3 °C15 January 1968	14.8 °C	1,069 mm	57	81
1967	33.6 °C28 May 1967	-11.7 °C25 February 1967	15.1 °C	1,038 mm	38	52
1966	36.3 °C14 July 1966	-18.2 °C31 January 1966	14.8 °C	1,176 mm	58	57
1965	34.5 °C16 August 1965	-20.0 °C19 January 1965	15.7 °C	887 mm	73	56
1964	36.6 °C21 June 1964	-9.6 °C15 January 1964	15.5 °C	1,585 mm	64	48
1963	34.9 °C7 August 1963	-11.3 °C24 January 1963	15.0 °C	1,157 mm	57	71
1962	35.4 °C16 July 1962	-16.2 °C13 December 1962	15.5 °C	1,159 mm	74	45
1961	34.0 °C31 July 1961	-11.0 °C22 January 1961	15.2 °C	1,314 mm	51	52
1960	35.6 °C20 July 1960	-13.7 °C5 March 1960	15.1 °C	1,161 mm	88	72
1959	36.9 °C29 June 1959	-8.7 °C6 January 1959	16.2 °C	1,401 mm	71	41
1958	37.0 °C14 June 1958	-14.9 °C18 February 1958	15.2 °C	1,030 mm	89	67
1957	36.3 °C14 July 1957	-10.7 °C12 December 1957	16.5 °C	1,190 mm	75	35
1956	37.2 °C6 August 1956	-5.9 °C23 November 1956	16.4 °C	1,114 mm	89	45
1955	35.0 °C18 July 1955	-10.6 °C13 February 1955	16.1 °C	955 mm	75	55
1954	38.6 °C27 June 1954	-5.8 °C7 December 1954	16.5 °C	732 mm	108	59
1953	37.3 °C31 July 1953	-10.0 °C19 December 1953	16.5 °C	1,078 mm	88	38
1952	38.0 °C29 July 1952	-7.1 °C30 January 1952	16.1 °C	1,149 mm	86	39
1951	36.6 °C14 July 1951	-8.1 °C16 December 1951	15.9 °C	1,155 mm	82	52
1950	35.8 °C27 June 1950	-9.7 °C25 November 1950	15.9 °C	924 mm	52	55
1949	36.1 °C28 July 1949	-5.1 °C16 March 1949	16.5 °C	1,518 mm	61	35
1948	36.1 °C29 August 1948	-14.1 °C25 January 1948	16.0 °C	1,614 mm	66	42
1947	36.7 °C31 July 1947	-9.1 °C10 February 1947	14.9 °C	1,213 mm	62	58
1946	33.9 °C12 July 1946	-6.9 °C2 January 1946	15.8 °C	1,228 mm	36	43
1945	37.2 °C30 June 1945	-11.1 °C17 December 1945	15.5 °C	1,392 mm	55	48
1944	37.2 °C23 June 1944	-4.7 °C13 February 1944	15.7 °C	1,282 mm	56	36
1943	35.5 °C27 August 1943	-5.9 °C15 February 1943	15.5 °C	993 mm	66	43
1942	35.6 °C20 July 1942	-5.7 °C11 January 1942	15.6 °C	1,194 mm	48	52
1941	34.0 °C29 May 1941	-4.8 °C18 March 1941	15.8 °C	1,008 mm	59	55
1940	35.1 °C27 July 1940	-21.2 °C27 January 1940	14.6 °C	1,256 mm	38	51

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

22.1 °C

+0.5 °C

Hot days (≥ 30 °C)

64 d/yr

-6

Frost days (< 0 °C)

46 d/yr

-3

Annual rainfall

1154 mm

-28 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	9.0 °C	-1.7 °C	46 mm	-58 mm
Feb	15.6 °C	+2.7 °C	76 mm	-25 mm
Mar	20.1 °C	+3.0 °C	59 mm	-62 mm
Apr	23.9 °C	+1.8 °C	105 mm	+7 mm
May	24.5 °C	-1.8 °C	223 mm	+130 mm
Jun	30.8 °C	+0.9 °C	158 mm	+67 mm
Jul	32.9 °C	+1.6 °C	94 mm	-12 mm
Aug	27.8 °C	-2.7 °C	226 mm	+118 mm
Sep	27.3 °C	-0.1 °C	35 mm	-60 mm
Oct	21.7 °C	-0.6 °C	70 mm	-10 mm
Nov	18.6 °C	+2.0 °C	20 mm	-66 mm
Dec	12.9 °C	+1.0 °C	41 mm	-56 mm

The year's extremes

Hottest day

36.2 °C

27 Jul 2025

Coldest day

-8.8 °C

23 Jan 2025

Wettest day

62.1 mm

5 Aug 2025

Windiest day

32.3 km/h

16 Feb 2025

Strongest gust

90.7 km/h

16 Feb 2025

Hottest feels-like

41.5 °C

25 Jun 2025

Coldest feels-like

-13.0 °C

23 Jan 2025

Snowiest day

5.5 cm

10 Jan 2025

Sunniest day

13.8 h

20 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Simpsonville?

Simpsonville has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.9 °C and it receives 1,182 mm of precipitation per year.

What is the hottest day ever recorded in Simpsonville?

The hottest day measured in Simpsonville between 1940 and 2025 was 1 July 2012, reaching 40.4 °C.

What is the coldest day in Simpsonville?

The coldest day measured in Simpsonville between 1940 and 2025 was 27 January 1940, at -21.2 °C.

Does it snow in Simpsonville?

Yes. Simpsonville gets on average 10.8 cm of snow per year and has around 49 frost days.

Has the climate of Simpsonville warmed?

Yes: Simpsonville warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Simpsonville?

The wettest day measured in Simpsonville between 1940 and 2025 was 17 September 2020, with 132 mm of rain in 24 hours.

What was the windiest day in Simpsonville?

The windiest day measured in Simpsonville between 1940 and 2025 was 27 September 2024, with winds reaching 50.0 km/h.

What is the warmest month in Simpsonville?

The warmest month in Simpsonville is July (25.9 °C on average); the coldest is January (5.3 °C).

How much does it rain in Simpsonville?

Simpsonville receives on average 1,182 mm of precipitation per year, spread over about 123 rainy days.

Is it sunny in Simpsonville?

Simpsonville gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.

What is the biggest single-day snowfall in Simpsonville?

The heaviest 24-hour snowfall measured in Simpsonville between 1940 and 2025 was 9 February 1948, with 28.8 cm.

Are there tropical nights in Simpsonville?

Yes: Simpsonville has on average 74 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Simpsonville?

In Simpsonville, between 1940 and 2025, the highest apparent temperature reached 44.4 °C on 30 June 2012, and the lowest was -26.3 °C on 27 January 1940.

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