Siloam Springs climate — normals and trends

Q: What is the climate of Siloam Springs?

Siloam Springs has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.6 °C and it receives 1,085 mm of precipitation per year.

Q: What is the hottest day ever recorded in Siloam Springs?

The hottest day measured in Siloam Springs between 1940 and 2025 was 3 August 2011, reaching 43.3 °C.

Q: What is the coldest day in Siloam Springs?

The coldest day measured in Siloam Springs between 1940 and 2025 was 16 February 2021, at -24.4 °C.

Q: Does it snow in Siloam Springs?

Yes. Siloam Springs gets on average 23.3 cm of snow per year and has around 68 frost days.

Q: Has the climate of Siloam Springs warmed?

Yes: Siloam Springs warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Siloam Springs?

The wettest day measured in Siloam Springs between 1940 and 2025 was 29 April 2017, with 209 mm of rain in 24 hours.

Q: What was the windiest day in Siloam Springs?

The windiest day measured in Siloam Springs between 1940 and 2025 was 12 February 1941, with winds reaching 40.3 km/h.

Q: What is the warmest month in Siloam Springs?

The warmest month in Siloam Springs is July (26.2 °C on average); the coldest is January (1.9 °C).

Q: How much does it rain in Siloam Springs?

Siloam Springs receives on average 1,085 mm of precipitation per year, spread over about 111 rainy days.

Q: Is it sunny in Siloam Springs?

Siloam Springs gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

Siloam Springs (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.6 °C and it receives 1,085 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 (26.2 °C on average) and the coldest is January (1.9 °C). Rainfall peaks in May.

Siloam Springs averages 68 frost days, 70 hot days (≥ 30 °C) and 111 rainy days per year.

Siloam Springs has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.

The number of frost days there went from about 76 to 60 per year over the period.

The hottest day of the period reached 43.3 °C (on 3 August 2011) and the coldest -24.4 °C (on 16 February 2021).

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

Siloam SpringsArkansas

coords: 36.19°, -94.54°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthJanuary

Mean daily temperature

14.6°C

Average daily high

20.1°C

Average daily low

9.7°C

Annual rainfall

1,085mm

Sunshine / day

9.3h

Mean relative humidity

69%

Average peak wind

16.0km/h

Seasonal range

24.3°C

Frost days (< 0 °C)

68 d/yr

Hot days (≥ 30 °C)

70 d/yr

Rainy days (≥ 1 mm)

111 d/yr

Annual snowfall

23.3 cm

Average feels-like high

19.5 °C

Average feels-like low

7.9 °C

Average peak gust

37.2 km/h

Tropical nights (≥ 20 °C)

66 d/yr

Solar radiation

16.3 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.4 °C

since 1940

+0.2 °C per decade · r² = 0.27 · 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

43.3 °C

3 August 2011

Coldest day

-24.4 °C

16 February 2021

Wettest day

209 mm

29 April 2017

Windiest day

40.3 km/h

12 February 1941

Strongest gust

100.1 km/h

9 February 2001

Hottest feels-like

45.0 °C

13 July 1954

Coldest feels-like

-29.5 °C

16 February 2021

Snowiest day

17.2 cm

13 December 2000

Sunniest day

14.2 h

26 June 2023

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	37.8 °C19 August 2025	-19.3 °C20 February 2025	15.7 °C	1,243 mm	66	58
2024	36.7 °C6 August 2024	-19.0 °C16 January 2024	16.4 °C	1,110 mm	91	52
2023	38.5 °C21 August 2023	-7.5 °C1 February 2023	16.1 °C	1,139 mm	88	51
2022	40.1 °C19 July 2022	-19.3 °C23 December 2022	15.3 °C	1,227 mm	89	79
2021	35.6 °C12 August 2021	-24.4 °C16 February 2021	15.5 °C	1,339 mm	76	55
2020	35.4 °C11 July 2020	-9.7 °C14 February 2020	15.3 °C	1,343 mm	74	51
2019	35.3 °C12 August 2019	-13.8 °C4 March 2019	14.9 °C	1,554 mm	70	66
2018	38.1 °C20 July 2018	-17.3 °C17 January 2018	15.0 °C	1,184 mm	94	72
2017	35.5 °C22 July 2017	-15.5 °C7 January 2017	15.9 °C	1,390 mm	55	44
2016	36.3 °C4 August 2016	-15.5 °C18 December 2016	16.3 °C	845 mm	91	61
2015	36.1 °C9 August 2015	-16.1 °C8 January 2015	15.3 °C	1,421 mm	71	61
2014	36.9 °C25 August 2014	-18.8 °C7 January 2014	13.9 °C	907 mm	59	78
2013	36.9 °C10 July 2013	-15.2 °C10 December 2013	14.1 °C	1,190 mm	73	77
2012	40.0 °C4 August 2012	-10.4 °C12 February 2012	17.0 °C	769 mm	99	44
2011	43.3 °C3 August 2011	-19.9 °C10 February 2011	15.6 °C	1,069 mm	95	60
2010	39.1 °C13 August 2010	-16.2 °C8 January 2010	15.1 °C	937 mm	89	76
2009	36.9 °C27 June 2009	-11.9 °C10 December 2009	14.5 °C	1,149 mm	60	70
2008	38.1 °C3 August 2008	-13.8 °C22 December 2008	14.4 °C	1,334 mm	53	83
2007	38.8 °C14 August 2007	-12.4 °C16 February 2007	15.4 °C	1,069 mm	56	74
2006	39.1 °C20 July 2006	-12.0 °C2 December 2006	16.1 °C	998 mm	92	46
2005	37.8 °C23 July 2005	-15.0 °C9 December 2005	15.6 °C	780 mm	102	56
2004	34.2 °C15 July 2004	-13.4 °C6 January 2004	15.0 °C	1,080 mm	41	60
2003	37.4 °C22 August 2003	-15.0 °C11 December 2003	14.6 °C	1,072 mm	55	69
2002	36.4 °C3 August 2002	-20.5 °C4 March 2002	14.5 °C	1,040 mm	68	69
2001	37.3 °C11 July 2001	-21.1 °C2 January 2001	15.3 °C	951 mm	77	61
2000	39.9 °C2 September 2000	-20.2 °C22 December 2000	14.8 °C	1,030 mm	76	72
1999	38.4 °C29 July 1999	-13.1 °C3 January 1999	15.6 °C	1,067 mm	72	43
1998	38.6 °C4 September 1998	-13.3 °C22 December 1998	16.0 °C	1,157 mm	103	48
1997	36.4 °C25 July 1997	-22.7 °C17 January 1997	14.0 °C	1,116 mm	60	61
1996	35.4 °C21 July 1996	-22.8 °C8 January 1996	13.7 °C	1,325 mm	46	73
1995	37.4 °C28 August 1995	-14.0 °C9 December 1995	14.4 °C	1,190 mm	63	68
1994	35.7 °C29 June 1994	-13.7 °C18 January 1994	14.7 °C	1,239 mm	63	61
1993	38.8 °C31 July 1993	-17.0 °C18 February 1993	13.9 °C	1,345 mm	67	72
1992	33.9 °C10 August 1992	-12.7 °C16 January 1992	14.4 °C	1,183 mm	37	51
1991	36.8 °C1 August 1991	-10.3 °C8 November 1991	15.2 °C	1,097 mm	83	67
1990	37.5 °C3 July 1990	-18.9 °C30 December 1990	15.4 °C	1,515 mm	77	47
1989	35.2 °C26 August 1989	-22.9 °C23 December 1989	13.8 °C	929 mm	56	83
1988	37.8 °C23 June 1988	-17.6 °C10 January 1988	14.4 °C	1,105 mm	83	76
1987	37.7 °C2 August 1987	-12.1 °C21 January 1987	15.0 °C	1,325 mm	78	57
1986	42.0 °C30 July 1986	-16.7 °C11 February 1986	15.0 °C	1,286 mm	65	64
1985	37.6 °C11 July 1985	-21.8 °C20 January 1985	14.0 °C	1,426 mm	60	79
1984	38.7 °C29 August 1984	-19.0 °C19 January 1984	14.4 °C	1,292 mm	80	59
1983	38.3 °C22 August 1983	-23.0 °C30 December 1983	13.8 °C	1,072 mm	73	67
1982	36.3 °C20 July 1982	-19.3 °C10 January 1982	14.5 °C	1,249 mm	71	65
1981	37.2 °C24 July 1981	-19.2 °C11 February 1981	14.6 °C	1,360 mm	55	63
1980	39.9 °C17 July 1980	-16.1 °C12 February 1980	14.9 °C	865 mm	102	73
1979	33.9 °C7 August 1979	-23.1 °C1 February 1979	13.4 °C	1,126 mm	57	83
1978	37.2 °C9 July 1978	-15.4 °C17 January 1978	13.7 °C	979 mm	79	91
1977	38.1 °C25 July 1977	-21.8 °C10 January 1977	14.7 °C	1,120 mm	72	69
1976	35.0 °C25 July 1976	-17.2 °C8 January 1976	13.5 °C	780 mm	48	84
1975	35.5 °C3 September 1975	-14.2 °C27 November 1975	13.9 °C	972 mm	55	82
1974	39.9 °C22 July 1974	-14.7 °C1 January 1974	14.2 °C	1,252 mm	54	66
1973	33.9 °C24 August 1973	-17.8 °C12 January 1973	14.2 °C	1,549 mm	43	63
1972	36.7 °C26 July 1972	-16.7 °C15 January 1972	14.1 °C	942 mm	69	75
1971	36.1 °C14 July 1971	-16.3 °C8 February 1971	14.5 °C	807 mm	70	67
1970	38.6 °C8 August 1970	-18.9 °C8 January 1970	14.0 °C	903 mm	78	80
1969	37.7 °C14 July 1969	-12.4 °C1 January 1969	13.9 °C	1,014 mm	63	81
1968	35.6 °C9 August 1968	-19.9 °C7 January 1968	13.5 °C	1,080 mm	56	87
1967	35.1 °C7 August 1967	-12.2 °C18 January 1967	14.2 °C	993 mm	40	72
1966	38.0 °C11 July 1966	-19.7 °C24 December 1966	13.8 °C	778 mm	57	77
1965	36.0 °C24 July 1965	-15.6 °C25 February 1965	14.8 °C	785 mm	74	71
1964	38.9 °C4 August 1964	-15.0 °C18 December 1964	14.6 °C	940 mm	74	76
1963	38.0 °C28 August 1963	-18.8 °C23 January 1963	15.0 °C	615 mm	101	81
1962	38.2 °C19 August 1962	-18.8 °C10 January 1962	14.3 °C	924 mm	64	65
1961	34.3 °C5 August 1961	-14.5 °C21 January 1961	13.6 °C	1,037 mm	51	70
1960	36.3 °C12 July 1960	-14.0 °C5 March 1960	13.7 °C	889 mm	75	90
1959	34.5 °C4 August 1959	-17.4 °C4 January 1959	14.2 °C	1,037 mm	58	78
1958	34.5 °C29 August 1958	-14.0 °C15 December 1958	13.7 °C	996 mm	61	80
1957	37.8 °C29 July 1957	-13.1 °C16 January 1957	14.5 °C	1,473 mm	67	57
1956	39.6 °C16 August 1956	-12.0 °C16 January 1956	15.1 °C	765 mm	90	74
1955	36.1 °C30 July 1955	-14.2 °C11 February 1955	14.6 °C	944 mm	72	80
1954	43.2 °C14 July 1954	-14.4 °C22 January 1954	16.1 °C	609 mm	108	61
1953	38.2 °C20 June 1953	-12.5 °C23 December 1953	15.4 °C	845 mm	111	59
1952	37.9 °C29 June 1952	-7.9 °C23 January 1952	14.8 °C	807 mm	100	67
1951	38.1 °C30 August 1951	-19.9 °C2 February 1951	14.0 °C	1,079 mm	66	77
1950	34.6 °C26 June 1950	-15.5 °C6 December 1950	13.7 °C	1,506 mm	24	86
1949	35.5 °C12 August 1949	-15.5 °C30 January 1949	14.4 °C	1,173 mm	59	73
1948	35.4 °C14 June 1948	-21.0 °C12 March 1948	14.0 °C	1,012 mm	62	75
1947	39.8 °C31 July 1947	-21.7 °C5 January 1947	14.3 °C	872 mm	73	79
1946	38.1 °C9 August 1946	-12.4 °C30 December 1946	15.4 °C	1,396 mm	63	43
1945	36.2 °C23 July 1945	-13.6 °C19 December 1945	14.1 °C	1,409 mm	46	69
1944	36.7 °C1 August 1944	-15.1 °C9 January 1944	14.6 °C	969 mm	72	65
1943	39.3 °C3 August 1943	-13.4 °C19 January 1943	14.7 °C	725 mm	77	70
1942	36.1 °C31 July 1942	-13.7 °C8 January 1942	13.7 °C	1,063 mm	55	75
1941	36.2 °C18 July 1941	-11.7 °C18 January 1941	13.9 °C	1,000 mm	66	80
1940	34.3 °C1 August 1940	-21.1 °C19 January 1940	12.7 °C	861 mm	36	89

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

21.2 °C

+1.1 °C

Hot days (≥ 30 °C)

66 d/yr

-4

Frost days (< 0 °C)

58 d/yr

-10

Annual rainfall

1243 mm

+158 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	5.8 °C	-1.4 °C	61 mm	+6 mm
Feb	9.6 °C	-0.4 °C	57 mm	-12 mm
Mar	19.6 °C	+4.8 °C	62 mm	-42 mm
Apr	21.3 °C	+1.1 °C	247 mm	+115 mm
May	23.5 °C	-0.7 °C	187 mm	+45 mm
Jun	29.2 °C	+0.2 °C	168 mm	+62 mm
Jul	32.1 °C	+0.3 °C	82 mm	+5 mm
Aug	31.2 °C	-0.3 °C	86 mm	+12 mm
Sep	28.3 °C	+0.8 °C	112 mm	+26 mm
Oct	23.3 °C	+1.7 °C	98 mm	+5 mm
Nov	17.5 °C	+3.2 °C	77 mm	-3 mm
Dec	12.1 °C	+3.1 °C	7 mm	-60 mm

The year's extremes

Hottest day

37.8 °C

19 Aug 2025

Coldest day

-19.3 °C

20 Feb 2025

Wettest day

56.7 mm

30 Apr 2025

Windiest day

36.9 km/h

14 Mar 2025

Strongest gust

92.2 km/h

14 Mar 2025

Hottest feels-like

42.6 °C

30 Jul 2025

Coldest feels-like

-24.6 °C

20 Feb 2025

Snowiest day

8.4 cm

18 Feb 2025

Sunniest day

14.2 h

19 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 Siloam Springs?

Siloam Springs has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.6 °C and it receives 1,085 mm of precipitation per year.

What is the hottest day ever recorded in Siloam Springs?

The hottest day measured in Siloam Springs between 1940 and 2025 was 3 August 2011, reaching 43.3 °C.

What is the coldest day in Siloam Springs?

The coldest day measured in Siloam Springs between 1940 and 2025 was 16 February 2021, at -24.4 °C.

Does it snow in Siloam Springs?

Yes. Siloam Springs gets on average 23.3 cm of snow per year and has around 68 frost days.

Has the climate of Siloam Springs warmed?

Yes: Siloam Springs warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Siloam Springs?

The wettest day measured in Siloam Springs between 1940 and 2025 was 29 April 2017, with 209 mm of rain in 24 hours.

What was the windiest day in Siloam Springs?

The windiest day measured in Siloam Springs between 1940 and 2025 was 12 February 1941, with winds reaching 40.3 km/h.

What is the warmest month in Siloam Springs?

The warmest month in Siloam Springs is July (26.2 °C on average); the coldest is January (1.9 °C).

How much does it rain in Siloam Springs?

Siloam Springs receives on average 1,085 mm of precipitation per year, spread over about 111 rainy days.

Is it sunny in Siloam Springs?

Siloam Springs gets on average 9.3 hours of sunshine per day, roughly 3,395 hours per year over 1940-2025.

What is the biggest single-day snowfall in Siloam Springs?

The heaviest 24-hour snowfall measured in Siloam Springs between 1940 and 2025 was 13 December 2000, with 17.2 cm.

Are there tropical nights in Siloam Springs?

Yes: Siloam Springs has on average 66 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Siloam Springs?

In Siloam Springs, between 1940 and 2025, the highest apparent temperature reached 45.0 °C on 13 July 1954, and the lowest was -29.5 °C on 16 February 2021.

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