Chambersburg climate — normals and trends

Q: What is the climate of Chambersburg?

Chambersburg has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.1 °C and it receives 1,017 mm of precipitation per year.

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

The hottest day measured in Chambersburg between 1940 and 2025 was 16 July 2024, reaching 38.4 °C.

Q: What is the coldest day in Chambersburg?

The coldest day measured in Chambersburg between 1940 and 2025 was 19 January 1994, at -27.1 °C.

Q: Does it snow in Chambersburg?

Yes. Chambersburg gets on average 74.4 cm of snow per year and has around 101 frost days.

Q: Has the climate of Chambersburg warmed?

Yes: Chambersburg warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Chambersburg?

The wettest day measured in Chambersburg between 1940 and 2025 was 22 June 1972, with 144 mm of rain in 24 hours.

Q: What was the windiest day in Chambersburg?

The windiest day measured in Chambersburg between 1940 and 2025 was 3 April 1975, with winds reaching 48.4 km/h.

Q: What is the warmest month in Chambersburg?

The warmest month in Chambersburg is July (23.4 °C on average); the coldest is January (-1.6 °C).

Q: How much does it rain in Chambersburg?

Chambersburg receives on average 1,017 mm of precipitation per year, spread over about 118 rainy days.

Q: Is it sunny in Chambersburg?

Chambersburg gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

Chambersburg (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.1 °C and it receives 1,017 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 (23.4 °C on average) and the coldest is January (-1.6 °C). Rainfall peaks in May.

Chambersburg averages 101 frost days, 29 hot days (≥ 30 °C) and 118 rainy days per year.

Chambersburg has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.

The number of frost days there went from about 113 to 89 per year over the period.

The hottest day of the period reached 38.4 °C (on 16 July 2024) and the coldest -27.1 °C (on 19 January 1994).

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

ChambersburgPennsylvania

coords: 39.94°, -77.66°
period: 1940–2025 · 86 yrs

DfaHot-summer humid continentalWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthFebruary

Mean daily temperature

11.1°C

Average daily high

16.1°C

Average daily low

6.5°C

Annual rainfall

1,017mm

Sunshine / day

8.8h

Mean relative humidity

69%

Average peak wind

15.1km/h

Seasonal range

25.0°C

Frost days (< 0 °C)

101 d/yr

Hot days (≥ 30 °C)

29 d/yr

Rainy days (≥ 1 mm)

118 d/yr

Annual snowfall

74.4 cm

Average feels-like high

14.5 °C

Average feels-like low

4.2 °C

Average peak gust

38.0 km/h

Tropical nights (≥ 20 °C)

25 d/yr

Solar radiation

14.6 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+2.0 °C

since 1940

+0.2 °C per decade · r² = 0.45 · 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

38.4 °C

16 July 2024

Coldest day

-27.1 °C

19 January 1994

Wettest day

144 mm

22 June 1972

Windiest day

48.4 km/h

3 April 1975

Strongest gust

109.4 km/h

25 March 1947

Hottest feels-like

43.4 °C

15 July 1995

Coldest feels-like

-32.5 °C

19 January 1994

Snowiest day

47.5 cm

13 March 1993

Sunniest day

14.5 h

2 July 2024

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	35.0 °C23 June 2025	-21.3 °C22 January 2025	12.0 °C	857 mm	41	99
2024	38.4 °C16 July 2024	-12.4 °C23 December 2024	13.1 °C	967 mm	44	69
2023	35.2 °C28 July 2023	-12.6 °C4 February 2023	13.3 °C	881 mm	42	60
2022	35.5 °C24 July 2022	-17.4 °C24 December 2022	12.1 °C	1,062 mm	41	98
2021	35.6 °C12 August 2021	-15.7 °C8 February 2021	12.9 °C	1,001 mm	46	92
2020	35.8 °C6 July 2020	-10.0 °C22 January 2020	13.0 °C	1,008 mm	44	66
2019	35.3 °C19 July 2019	-18.1 °C31 January 2019	12.4 °C	1,105 mm	46	100
2018	35.2 °C3 July 2018	-17.9 °C7 January 2018	11.9 °C	1,659 mm	28	105
2017	32.9 °C20 July 2017	-13.2 °C28 December 2017	12.6 °C	1,014 mm	32	77
2016	35.2 °C25 July 2016	-14.5 °C14 February 2016	12.6 °C	909 mm	59	88
2015	33.9 °C17 August 2015	-21.0 °C24 February 2015	12.0 °C	916 mm	34	91
2014	34.7 °C23 July 2014	-20.6 °C12 February 2014	10.7 °C	915 mm	18	109
2013	34.0 °C17 July 2013	-14.4 °C12 December 2013	11.5 °C	1,012 mm	28	106
2012	36.0 °C7 July 2012	-13.0 °C4 January 2012	12.8 °C	858 mm	43	81
2011	38.1 °C22 July 2011	-15.4 °C11 February 2011	12.2 °C	1,340 mm	40	95
2010	37.3 °C8 July 2010	-12.2 °C9 February 2010	12.1 °C	1,016 mm	50	97
2009	34.0 °C10 August 2009	-16.9 °C17 January 2009	11.1 °C	1,013 mm	14	96
2008	33.4 °C9 June 2008	-14.6 °C11 February 2008	11.3 °C	1,064 mm	22	103
2007	34.4 °C9 July 2007	-17.3 °C6 February 2007	11.9 °C	878 mm	41	104
2006	35.7 °C3 August 2006	-13.9 °C19 February 2006	12.4 °C	930 mm	39	81
2005	35.0 °C4 August 2005	-17.1 °C24 January 2005	11.7 °C	906 mm	53	95
2004	31.2 °C28 August 2004	-20.5 °C25 January 2004	11.3 °C	1,098 mm	9	98
2003	32.7 °C22 August 2003	-23.0 °C18 January 2003	10.3 °C	1,299 mm	18	111
2002	35.8 °C2 August 2002	-13.2 °C6 December 2002	12.0 °C	1,033 mm	43	93
2001	35.1 °C24 July 2001	-16.2 °C22 January 2001	11.8 °C	753 mm	24	90
2000	31.7 °C11 June 2000	-16.5 °C26 December 2000	11.0 °C	829 mm	11	102
1999	34.9 °C6 July 1999	-18.4 °C6 January 1999	11.7 °C	991 mm	32	91
1998	32.6 °C15 September 1998	-17.5 °C1 January 1998	12.5 °C	985 mm	19	73
1997	34.5 °C15 July 1997	-21.0 °C19 January 1997	10.7 °C	883 mm	20	107
1996	32.6 °C20 May 1996	-25.4 °C5 February 1996	10.3 °C	1,516 mm	4	105
1995	36.7 °C15 July 1995	-17.3 °C6 February 1995	11.1 °C	1,075 mm	33	108
1994	35.2 °C8 July 1994	-27.1 °C19 January 1994	11.1 °C	1,104 mm	34	100
1993	35.0 °C28 August 1993	-20.6 °C19 February 1993	11.1 °C	1,065 mm	40	97
1992	33.2 °C14 July 1992	-15.3 °C13 March 1992	10.5 °C	1,072 mm	8	95
1991	36.0 °C2 August 1991	-12.5 °C26 January 1991	12.5 °C	805 mm	56	88
1990	35.3 °C4 July 1990	-14.3 °C26 February 1990	12.3 °C	1,145 mm	28	82
1989	33.7 °C11 July 1989	-17.8 °C22 December 1989	10.7 °C	1,232 mm	20	103
1988	37.9 °C16 July 1988	-18.4 °C27 January 1988	10.9 °C	822 mm	50	107
1987	35.7 °C21 July 1987	-20.5 °C25 January 1987	11.5 °C	1,034 mm	37	104
1986	34.1 °C7 July 1986	-20.0 °C29 January 1986	11.2 °C	955 mm	27	96
1985	34.2 °C14 August 1985	-25.7 °C21 January 1985	11.3 °C	874 mm	26	94
1984	32.9 °C9 June 1984	-25.2 °C22 January 1984	10.9 °C	1,071 mm	20	98
1983	36.5 °C20 August 1983	-23.0 °C26 December 1983	11.1 °C	1,101 mm	57	92
1982	32.3 °C18 July 1982	-25.2 °C17 January 1982	10.7 °C	962 mm	14	105
1981	33.9 °C16 June 1981	-17.2 °C4 January 1981	10.7 °C	912 mm	18	103
1980	37.6 °C20 July 1980	-19.3 °C26 December 1980	11.0 °C	790 mm	52	111
1979	33.0 °C10 August 1979	-25.2 °C11 February 1979	10.4 °C	1,238 mm	10	98
1978	33.7 °C23 July 1978	-22.3 °C20 February 1978	10.1 °C	1,227 mm	14	110
1977	34.5 °C16 July 1977	-21.5 °C17 January 1977	11.1 °C	936 mm	35	100
1976	32.0 °C26 August 1976	-19.1 °C10 January 1976	10.3 °C	1,044 mm	17	114
1975	34.5 °C2 August 1975	-23.1 °C21 January 1975	11.2 °C	1,323 mm	19	106
1974	33.0 °C9 July 1974	-15.6 °C13 January 1974	11.1 °C	1,005 mm	17	104
1973	34.4 °C28 August 1973	-17.9 °C17 February 1973	11.4 °C	1,235 mm	22	89
1972	33.3 °C21 July 1972	-21.4 °C8 February 1972	10.4 °C	1,378 mm	18	106
1971	32.7 °C8 July 1971	-20.6 °C1 February 1971	10.8 °C	1,162 mm	12	105
1970	32.7 °C22 September 1970	-18.9 °C9 January 1970	10.7 °C	918 mm	31	115
1969	36.0 °C30 June 1969	-17.2 °C25 December 1969	10.7 °C	921 mm	28	118
1968	34.4 °C23 August 1968	-22.1 °C2 January 1968	10.7 °C	854 mm	29	108
1967	32.7 °C13 June 1967	-22.2 °C8 February 1967	10.2 °C	982 mm	19	103
1966	37.4 °C3 July 1966	-18.5 °C29 January 1966	10.4 °C	881 mm	44	108
1965	34.2 °C16 August 1965	-22.2 °C4 February 1965	10.5 °C	774 mm	33	112
1964	33.8 °C30 June 1964	-22.1 °C15 January 1964	10.8 °C	907 mm	34	106
1963	33.9 °C26 July 1963	-25.5 °C29 January 1963	10.0 °C	711 mm	24	114
1962	34.0 °C20 August 1962	-20.1 °C11 February 1962	10.1 °C	978 mm	24	125
1961	33.3 °C2 July 1961	-20.5 °C2 February 1961	10.6 °C	1,013 mm	32	108
1960	32.4 °C28 August 1960	-20.8 °C23 December 1960	10.2 °C	1,007 mm	17	118
1959	35.4 °C29 June 1959	-17.7 °C19 January 1959	11.7 °C	981 mm	45	102
1958	32.9 °C15 July 1958	-19.9 °C12 February 1958	9.9 °C	954 mm	13	111
1957	36.0 °C21 July 1957	-19.8 °C17 January 1957	11.2 °C	853 mm	28	101
1956	34.4 °C2 July 1956	-11.8 °C25 January 1956	10.7 °C	995 mm	16	109
1955	36.0 °C2 August 1955	-18.7 °C5 February 1955	11.2 °C	996 mm	33	113
1954	37.5 °C14 July 1954	-18.1 °C18 January 1954	11.3 °C	959 mm	26	106
1953	37.0 °C3 September 1953	-16.9 °C18 February 1953	11.9 °C	889 mm	44	88
1952	36.5 °C26 June 1952	-13.1 °C30 January 1952	11.4 °C	1,216 mm	38	100
1951	33.8 °C27 July 1951	-24.4 °C17 December 1951	10.9 °C	1,082 mm	29	99
1950	32.8 °C26 June 1950	-20.9 °C28 December 1950	10.4 °C	1,204 mm	12	118
1949	34.5 °C10 August 1949	-18.2 °C3 February 1949	12.0 °C	1,018 mm	29	85
1948	36.9 °C26 August 1948	-22.1 °C26 January 1948	10.6 °C	1,052 mm	24	101
1947	32.5 °C11 June 1947	-16.3 °C5 February 1947	10.6 °C	796 mm	15	120
1946	32.0 °C19 July 1946	-15.6 °C2 January 1946	11.2 °C	962 mm	9	92
1945	32.7 °C30 June 1945	-20.2 °C10 January 1945	10.4 °C	1,339 mm	10	106
1944	34.5 °C12 August 1944	-19.5 °C22 December 1944	10.5 °C	1,004 mm	32	116
1943	32.7 °C12 August 1943	-23.7 °C16 February 1943	9.9 °C	835 mm	25	121
1942	33.4 °C19 July 1942	-25.3 °C8 January 1942	10.3 °C	1,269 mm	11	117
1941	34.7 °C28 July 1941	-18.5 °C10 February 1941	10.5 °C	760 mm	22	118
1940	34.1 °C30 July 1940	-22.0 °C20 January 1940	9.3 °C	1,035 mm	14	121

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

16.9 °C

+0.8 °C

Hot days (≥ 30 °C)

41 d/yr

+12

Frost days (< 0 °C)

99 d/yr

-2

Annual rainfall

857 mm

-160 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	0.4 °C	-2.0 °C	33 mm	-42 mm
Feb	4.5 °C	+0.3 °C	61 mm	-13 mm
Mar	14.6 °C	+5.1 °C	47 mm	-47 mm
Apr	18.2 °C	+2.0 °C	72 mm	-20 mm
May	21.1 °C	-0.4 °C	208 mm	+104 mm
Jun	27.7 °C	+1.5 °C	96 mm	+10 mm
Jul	30.6 °C	+1.9 °C	88 mm	+4 mm
Aug	26.9 °C	-0.8 °C	45 mm	-33 mm
Sep	25.8 °C	+2.0 °C	40 mm	-46 mm
Oct	18.3 °C	+0.8 °C	65 mm	-14 mm
Nov	11.1 °C	+0.5 °C	40 mm	-43 mm
Dec	3.6 °C	-0.9 °C	60 mm	-20 mm

The year's extremes

Hottest day

35.0 °C

23 Jun 2025

Coldest day

-21.3 °C

22 Jan 2025

Wettest day

39.3 mm

13 May 2025

Windiest day

32.4 km/h

11 Nov 2025

Strongest gust

84.6 km/h

16 Mar 2025

Hottest feels-like

40.1 °C

25 Jun 2025

Coldest feels-like

-26.6 °C

22 Jan 2025

Snowiest day

8.1 cm

2 Dec 2025

Sunniest day

14.4 h

4 Jul 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 Chambersburg?

Chambersburg has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.1 °C and it receives 1,017 mm of precipitation per year.

What is the hottest day ever recorded in Chambersburg?

The hottest day measured in Chambersburg between 1940 and 2025 was 16 July 2024, reaching 38.4 °C.

What is the coldest day in Chambersburg?

The coldest day measured in Chambersburg between 1940 and 2025 was 19 January 1994, at -27.1 °C.

Does it snow in Chambersburg?

Yes. Chambersburg gets on average 74.4 cm of snow per year and has around 101 frost days.

Has the climate of Chambersburg warmed?

Yes: Chambersburg warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Chambersburg?

The wettest day measured in Chambersburg between 1940 and 2025 was 22 June 1972, with 144 mm of rain in 24 hours.

What was the windiest day in Chambersburg?

The windiest day measured in Chambersburg between 1940 and 2025 was 3 April 1975, with winds reaching 48.4 km/h.

What is the warmest month in Chambersburg?

The warmest month in Chambersburg is July (23.4 °C on average); the coldest is January (-1.6 °C).

How much does it rain in Chambersburg?

Chambersburg receives on average 1,017 mm of precipitation per year, spread over about 118 rainy days.

Is it sunny in Chambersburg?

Chambersburg gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.

What is the biggest single-day snowfall in Chambersburg?

The heaviest 24-hour snowfall measured in Chambersburg between 1940 and 2025 was 13 March 1993, with 47.5 cm.

Are there tropical nights in Chambersburg?

Yes: Chambersburg has on average 25 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Chambersburg?

In Chambersburg, between 1940 and 2025, the highest apparent temperature reached 43.4 °C on 15 July 1995, and the lowest was -32.5 °C on 19 January 1994.

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