Carlisle climate — normals and trends
Carlisle (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.3 °C and it receives 1,073 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 (23.6 °C on average) and the coldest is January (-1.4 °C). Rainfall peaks in May.
Carlisle averages 97 frost days, 31 hot days (≥ 30 °C) and 122 rainy days per year.
Carlisle 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 109 to 85 per year over the period.
The hottest day of the period reached 38.8 °C (on 22 July 2011) and the coldest -26.1 °C (on 29 January 1963).
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
CarlislePennsylvania
- coords
- 40.20°, -77.19°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.3°C
Average daily high
16.2°C
Average daily low
6.8°C
Annual rainfall
1,073mm
Sunshine / day
8.7h
Mean relative humidity
68%
Average peak wind
14.7km/h
Seasonal range
25.0°C
Frost days (< 0 °C)
97 d/yr
Hot days (≥ 30 °C)
31 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
77.8 cm
Average feels-like high
14.7 °C
Average feels-like low
4.5 °C
Average peak gust
37.5 km/h
Tropical nights (≥ 20 °C)
29 d/yr
Solar radiation
14.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.47 · p = < 0.001
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
38.8 °C
22 July 2011
Coldest day
-26.1 °C
29 January 1963
Wettest day
144 mm
22 June 1972
Windiest day
43.9 km/h
3 April 1975
Strongest gust
127.4 km/h
25 November 1950
Hottest feels-like
43.6 °C
15 July 1995
Coldest feels-like
-32.2 °C
21 January 1985
Snowiest day
46.0 cm
13 March 1993
Sunniest day
14.5 h
2 July 2007
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?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 0.9 °C | -1.6 °C | 29 mm | -49 mm |
| Feb | 4.6 °C | +0.3 °C | 66 mm | -9 mm |
| Mar | 14.7 °C | +5.2 °C | 57 mm | -39 mm |
| Apr | 18.0 °C | +1.7 °C | 89 mm | -7 mm |
| May | 21.1 °C | -0.6 °C | 216 mm | +109 mm |
| Jun | 27.5 °C | +1.1 °C | 134 mm | +40 mm |
| Jul | 30.1 °C | +1.2 °C | 130 mm | +35 mm |
| Aug | 26.6 °C | -1.2 °C | 52 mm | -38 mm |
| Sep | 25.6 °C | +1.7 °C | 39 mm | -55 mm |
| Oct | 18.2 °C | +0.6 °C | 80 mm | -1 mm |
| Nov | 11.2 °C | +0.4 °C | 38 mm | -48 mm |
| Dec | 3.4 °C | -1.3 °C | 63 mm | -19 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Carlisle?
Carlisle has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.3 °C and it receives 1,073 mm of precipitation per year.
What is the hottest day ever recorded in Carlisle?
The hottest day measured in Carlisle between 1940 and 2025 was 22 July 2011, reaching 38.8 °C.
What is the coldest day in Carlisle?
The coldest day measured in Carlisle between 1940 and 2025 was 29 January 1963, at -26.1 °C.
Does it snow in Carlisle?
Yes. Carlisle gets on average 77.8 cm of snow per year and has around 97 frost days.
Has the climate of Carlisle warmed?
Yes: Carlisle warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Carlisle?
The wettest day measured in Carlisle between 1940 and 2025 was 22 June 1972, with 144 mm of rain in 24 hours.
What was the windiest day in Carlisle?
The windiest day measured in Carlisle between 1940 and 2025 was 3 April 1975, with winds reaching 43.9 km/h.
What is the warmest month in Carlisle?
The warmest month in Carlisle is July (23.6 °C on average); the coldest is January (-1.4 °C).
How much does it rain in Carlisle?
Carlisle receives on average 1,073 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Carlisle?
Carlisle gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Carlisle?
The heaviest 24-hour snowfall measured in Carlisle between 1940 and 2025 was 13 March 1993, with 46.0 cm.
Are there tropical nights in Carlisle?
Yes: Carlisle has on average 29 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Carlisle?
In Carlisle, between 1940 and 2025, the highest apparent temperature reached 43.6 °C on 15 July 1995, and the lowest was -32.2 °C on 21 January 1985.
Compare Carlisle with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Carlisle