New Castle climate — normals and trends

Q: What is the climate of New Castle?

New Castle has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 1,174 mm of precipitation per year.

Q: What is the hottest day ever recorded in New Castle?

The hottest day measured in New Castle between 1940 and 2025 was 16 July 1988, reaching 38.0 °C.

Q: What is the coldest day in New Castle?

The coldest day measured in New Castle between 1940 and 2025 was 19 January 1994, at -29.8 °C.

Q: Does it snow in New Castle?

Yes. New Castle gets on average 89.3 cm of snow per year and has around 114 frost days.

Q: Has the climate of New Castle warmed?

Yes: New Castle warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in New Castle?

The wettest day measured in New Castle between 1940 and 2025 was 8 September 2004, with 107 mm of rain in 24 hours.

Q: What was the windiest day in New Castle?

The windiest day measured in New Castle between 1940 and 2025 was 3 April 1975, with winds reaching 46.2 km/h.

Q: What is the warmest month in New Castle?

The warmest month in New Castle is July (21.8 °C on average); the coldest is January (-2.9 °C).

Q: How much does it rain in New Castle?

New Castle receives on average 1,174 mm of precipitation per year, spread over about 149 rainy days.

Q: Is it sunny in New Castle?

New Castle gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

New Castle (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 1,174 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 (21.8 °C on average) and the coldest is January (-2.9 °C). Rainfall peaks in May.

New Castle averages 114 frost days, 15 hot days (≥ 30 °C) and 149 rainy days per year.

New Castle has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The number of frost days there went from about 127 to 101 per year over the period.

The hottest day of the period reached 38.0 °C (on 16 July 1988) and the coldest -29.8 °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

New CastlePennsylvania

coords: 41.00°, -80.35°
period: 1940–2025 · 86 yrs

DfbWarm-summer humid continentalWarmest monthJulyColdest monthJanuaryWettest monthMayDriest monthFebruary

Mean daily temperature

9.8°C

Average daily high

14.8°C

Average daily low

5.3°C

Annual rainfall

1,174mm

Sunshine / day

8.3h

Mean relative humidity

73%

Average peak wind

15.8km/h

Seasonal range

24.7°C

Frost days (< 0 °C)

114 d/yr

Hot days (≥ 30 °C)

15 d/yr

Rainy days (≥ 1 mm)

149 d/yr

Annual snowfall

89.3 cm

Average feels-like high

13.1 °C

Average feels-like low

2.6 °C

Average peak gust

37.8 km/h

Tropical nights (≥ 20 °C)

12 d/yr

Solar radiation

14.0 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.8 °C

since 1940

+0.2 °C per decade · r² = 0.39 · 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

38.0 °C

16 July 1988

Coldest day

-29.8 °C

19 January 1994

Wettest day

107 mm

8 September 2004

Windiest day

46.2 km/h

3 April 1975

Strongest gust

113.4 km/h

16 February 1967

Hottest feels-like

42.5 °C

15 July 1995

Coldest feels-like

-35.6 °C

19 January 1994

Snowiest day

33.3 cm

25 November 1950

Sunniest day

14.9 h

18 June 1941

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	33.7 °C24 June 2025	-27.3 °C22 January 2025	10.5 °C	1,171 mm	25	117
2024	33.1 °C22 June 2024	-15.5 °C17 January 2024	12.0 °C	1,311 mm	22	81
2023	32.2 °C2 June 2023	-13.3 °C4 February 2023	11.6 °C	1,091 mm	13	86
2022	33.1 °C21 June 2022	-21.7 °C22 January 2022	10.6 °C	1,281 mm	20	104
2021	33.1 °C29 June 2021	-16.2 °C21 February 2021	11.4 °C	1,186 mm	16	104
2020	34.1 °C6 July 2020	-17.6 °C15 February 2020	11.4 °C	1,229 mm	32	84
2019	32.5 °C20 July 2019	-22.9 °C22 January 2019	10.7 °C	1,496 mm	10	108
2018	33.3 °C5 September 2018	-24.0 °C7 January 2018	10.8 °C	1,627 mm	26	114
2017	31.9 °C24 September 2017	-18.3 °C9 January 2017	11.3 °C	1,297 mm	14	89
2016	33.5 °C23 July 2016	-22.6 °C14 February 2016	11.5 °C	1,148 mm	31	98
2015	32.4 °C7 September 2015	-25.0 °C20 February 2015	10.6 °C	1,115 mm	16	93
2014	31.2 °C1 July 2014	-24.6 °C28 January 2014	9.2 °C	1,119 mm	6	119
2013	32.4 °C10 September 2013	-15.5 °C23 January 2013	10.1 °C	1,113 mm	10	122
2012	36.1 °C7 July 2012	-18.4 °C15 January 2012	11.7 °C	1,079 mm	30	98
2011	36.2 °C21 July 2011	-22.9 °C22 January 2011	10.8 °C	1,538 mm	21	102
2010	33.5 °C23 July 2010	-18.0 °C29 January 2010	10.4 °C	1,045 mm	23	111
2009	31.8 °C10 August 2009	-24.9 °C17 January 2009	9.8 °C	1,066 mm	5	108
2008	33.9 °C9 June 2008	-17.4 °C22 December 2008	9.9 °C	1,194 mm	21	123
2007	33.2 °C9 July 2007	-22.0 °C6 February 2007	10.4 °C	1,098 mm	22	115
2006	32.6 °C2 August 2006	-14.5 °C19 February 2006	10.8 °C	1,293 mm	12	94
2005	33.7 °C4 August 2005	-19.7 °C28 January 2005	10.3 °C	1,106 mm	34	100
2004	30.2 °C9 June 2004	-22.3 °C25 January 2004	10.0 °C	1,353 mm	1	103
2003	31.2 °C21 August 2003	-21.3 °C27 January 2003	9.6 °C	1,314 mm	5	111
2002	34.1 °C17 July 2002	-12.7 °C3 December 2002	10.8 °C	1,078 mm	33	105
2001	34.4 °C8 August 2001	-14.8 °C3 January 2001	10.7 °C	964 mm	13	100
2000	30.3 °C10 June 2000	-21.6 °C26 December 2000	9.7 °C	1,111 mm	2	117
1999	34.1 °C5 July 1999	-20.7 °C8 March 1999	10.5 °C	1,037 mm	23	105
1998	32.0 °C25 June 1998	-13.6 °C23 December 1998	11.5 °C	1,057 mm	8	88
1997	31.5 °C14 July 1997	-24.7 °C19 January 1997	9.2 °C	1,170 mm	7	117
1996	30.6 °C20 May 1996	-20.7 °C10 March 1996	9.1 °C	1,466 mm	5	121
1995	35.4 °C15 July 1995	-19.6 °C12 February 1995	9.8 °C	1,076 mm	27	125
1994	33.3 °C17 June 1994	-29.8 °C19 January 1994	9.7 °C	1,139 mm	15	110
1993	35.3 °C28 July 1993	-21.8 °C19 February 1993	9.9 °C	1,079 mm	32	109
1992	31.2 °C14 July 1992	-19.3 °C19 January 1992	9.5 °C	1,138 mm	7	109
1991	36.0 °C20 July 1991	-17.0 °C22 January 1991	11.4 °C	937 mm	35	103
1990	34.8 °C4 July 1990	-18.1 °C26 February 1990	11.1 °C	1,438 mm	10	100
1989	32.9 °C10 July 1989	-22.8 °C22 December 1989	9.2 °C	1,232 mm	11	120
1988	38.0 °C16 July 1988	-22.0 °C7 February 1988	9.9 °C	880 mm	41	120
1987	33.6 °C17 August 1987	-21.7 °C25 January 1987	10.5 °C	1,176 mm	21	107
1986	32.7 °C18 July 1986	-21.3 °C8 March 1986	10.2 °C	1,161 mm	9	108
1985	33.3 °C13 August 1985	-28.4 °C21 January 1985	9.7 °C	1,132 mm	10	107
1984	32.3 °C9 June 1984	-27.3 °C21 January 1984	9.7 °C	1,219 mm	8	110
1983	33.4 °C15 July 1983	-24.9 °C25 December 1983	10.0 °C	1,092 mm	27	107
1982	31.7 °C7 July 1982	-27.3 °C17 January 1982	9.7 °C	1,176 mm	5	112
1981	32.5 °C8 July 1981	-24.8 °C12 January 1981	9.2 °C	1,107 mm	6	120
1980	33.5 °C20 July 1980	-19.9 °C25 December 1980	8.9 °C	1,245 mm	8	125
1979	29.3 °C15 July 1979	-24.9 °C11 February 1979	8.9 °C	1,235 mm	0	121
1978	33.8 °C22 July 1978	-19.8 °C4 February 1978	8.8 °C	1,158 mm	14	126
1977	33.3 °C6 July 1977	-25.9 °C17 January 1977	9.4 °C	1,382 mm	8	109
1976	30.7 °C18 April 1976	-20.8 °C2 February 1976	8.7 °C	1,038 mm	3	136
1975	34.5 °C1 August 1975	-22.6 °C10 February 1975	10.0 °C	1,331 mm	10	119
1974	33.7 °C14 July 1974	-19.6 °C5 January 1974	9.6 °C	1,176 mm	7	120
1973	33.2 °C28 August 1973	-22.1 °C17 February 1973	10.5 °C	1,362 mm	16	102
1972	32.1 °C23 July 1972	-22.1 °C16 January 1972	8.9 °C	1,302 mm	5	128
1971	35.1 °C28 June 1971	-22.7 °C1 February 1971	9.6 °C	1,032 mm	9	117
1970	31.3 °C1 July 1970	-22.3 °C4 February 1970	9.5 °C	1,232 mm	6	112
1969	32.4 °C27 June 1969	-18.2 °C5 January 1969	9.2 °C	1,006 mm	10	130
1968	32.4 °C18 July 1968	-21.0 °C8 January 1968	9.2 °C	988 mm	17	121
1967	31.8 °C13 June 1967	-24.5 °C8 February 1967	9.1 °C	1,102 mm	9	115
1966	36.2 °C3 July 1966	-23.2 °C29 January 1966	9.1 °C	994 mm	22	126
1965	33.5 °C15 August 1965	-27.3 °C17 January 1965	9.4 °C	1,121 mm	10	123
1964	32.8 °C27 July 1964	-19.4 °C17 February 1964	9.8 °C	1,134 mm	25	117
1963	32.9 °C26 June 1963	-28.0 °C24 January 1963	8.6 °C	872 mm	15	125
1962	32.1 °C18 May 1962	-22.0 °C11 February 1962	9.1 °C	1,088 mm	17	129
1961	32.2 °C1 July 1961	-22.1 °C2 February 1961	9.5 °C	1,211 mm	15	116
1960	31.1 °C28 August 1960	-19.9 °C23 December 1960	9.1 °C	995 mm	9	126
1959	33.9 °C9 September 1959	-20.4 °C18 January 1959	10.2 °C	1,285 mm	34	120
1958	31.0 °C2 July 1958	-23.5 °C11 December 1958	8.5 °C	1,157 mm	2	120
1957	32.4 °C17 June 1957	-22.2 °C17 January 1957	9.9 °C	1,169 mm	14	117
1956	32.2 °C1 July 1956	-16.6 °C21 March 1956	9.5 °C	1,300 mm	6	121
1955	34.1 °C2 August 1955	-24.5 °C28 January 1955	10.2 °C	1,077 mm	33	123
1954	35.0 °C14 July 1954	-17.9 °C18 January 1954	10.0 °C	1,188 mm	17	125
1953	35.3 °C3 September 1953	-17.8 °C18 February 1953	10.5 °C	1,001 mm	23	103
1952	35.3 °C26 June 1952	-16.4 °C2 March 1952	10.2 °C	1,173 mm	32	116
1951	33.1 °C30 August 1951	-25.4 °C3 February 1951	9.6 °C	1,258 mm	18	116
1950	30.7 °C26 June 1950	-21.1 °C28 December 1950	9.1 °C	1,451 mm	4	123
1949	34.3 °C3 July 1949	-15.0 °C3 February 1949	10.9 °C	1,139 mm	24	110
1948	34.6 °C28 August 1948	-23.6 °C9 February 1948	9.7 °C	1,336 mm	13	106
1947	31.3 °C13 August 1947	-18.1 °C5 February 1947	9.1 °C	1,133 mm	5	139
1946	31.2 °C11 July 1946	-23.7 °C27 January 1946	10.2 °C	1,105 mm	2	101
1945	30.7 °C30 August 1945	-21.1 °C10 January 1945	9.2 °C	1,315 mm	7	116
1944	31.9 °C4 August 1944	-22.5 °C22 December 1944	9.3 °C	1,083 mm	15	133
1943	30.9 °C25 June 1943	-22.8 °C18 February 1943	8.3 °C	1,089 mm	2	146
1942	31.2 °C17 July 1942	-25.3 °C3 February 1942	8.8 °C	1,374 mm	4	131
1941	33.0 °C28 July 1941	-23.4 °C10 February 1941	8.9 °C	882 mm	9	132
1940	32.5 °C25 July 1940	-25.5 °C19 January 1940	7.9 °C	1,279 mm	11	137

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

15.5 °C

+0.7 °C

Hot days (≥ 30 °C)

25 d/yr

+10

Frost days (< 0 °C)

117 d/yr

Annual rainfall

1171 mm

-3 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	-1.8 °C	-2.8 °C	51 mm	-36 mm
Feb	2.3 °C	-0.5 °C	111 mm	+33 mm
Mar	13.0 °C	+4.7 °C	75 mm	-32 mm
Apr	16.5 °C	+1.5 °C	116 mm	+3 mm
May	19.3 °C	-1.1 °C	226 mm	+106 mm
Jun	26.6 °C	+1.6 °C	172 mm	+56 mm
Jul	28.9 °C	+1.8 °C	82 mm	-22 mm
Aug	26.7 °C	+0.5 °C	30 mm	-64 mm
Sep	25.4 °C	+2.8 °C	64 mm	-26 mm
Oct	17.4 °C	+1.1 °C	90 mm	+8 mm
Nov	8.8 °C	-0.4 °C	65 mm	-28 mm
Dec	2.7 °C	-0.5 °C	89 mm	-0 mm

The year's extremes

Hottest day

33.7 °C

24 Jun 2025

Coldest day

-27.3 °C

22 Jan 2025

Wettest day

32.0 mm

16 Feb 2025

Windiest day

36.9 km/h

29 Dec 2025

Strongest gust

83.5 km/h

15 Apr 2025

Hottest feels-like

38.3 °C

23 Jun 2025

Coldest feels-like

-32.9 °C

22 Jan 2025

Snowiest day

6.9 cm

2 Dec 2025

Sunniest day

14.9 h

22 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 New Castle?

New Castle has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 1,174 mm of precipitation per year.

What is the hottest day ever recorded in New Castle?

The hottest day measured in New Castle between 1940 and 2025 was 16 July 1988, reaching 38.0 °C.

What is the coldest day in New Castle?

The coldest day measured in New Castle between 1940 and 2025 was 19 January 1994, at -29.8 °C.

Does it snow in New Castle?

Yes. New Castle gets on average 89.3 cm of snow per year and has around 114 frost days.

Has the climate of New Castle warmed?

Yes: New Castle warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in New Castle?

The wettest day measured in New Castle between 1940 and 2025 was 8 September 2004, with 107 mm of rain in 24 hours.

What was the windiest day in New Castle?

The windiest day measured in New Castle between 1940 and 2025 was 3 April 1975, with winds reaching 46.2 km/h.

What is the warmest month in New Castle?

The warmest month in New Castle is July (21.8 °C on average); the coldest is January (-2.9 °C).

How much does it rain in New Castle?

New Castle receives on average 1,174 mm of precipitation per year, spread over about 149 rainy days.

Is it sunny in New Castle?

New Castle gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.

What is the biggest single-day snowfall in New Castle?

The heaviest 24-hour snowfall measured in New Castle between 1940 and 2025 was 25 November 1950, with 33.3 cm.

Are there tropical nights in New Castle?

Yes: New Castle has on average 12 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in New Castle?

In New Castle, between 1940 and 2025, the highest apparent temperature reached 42.5 °C on 15 July 1995, and the lowest was -35.6 °C on 19 January 1994.

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