Keene climate — normals and trends
Keene (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.7 °C and it receives 1,045 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 (21.1 °C on average) and the coldest is January (-6.1 °C). Rainfall peaks in December.
Keene averages 142 frost days, 13 hot days (≥ 30 °C) and 123 rainy days per year.
Keene 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 153 to 131 per year over the period.
The hottest day of the period reached 37.8 °C (on 10 June 2008) and the coldest -32.2 °C (on 7 February 1993).
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
KeeneNew Hampshire
- coords
- 42.93°, -72.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.7°C
Average daily high
12.7°C
Average daily low
2.8°C
Annual rainfall
1,045mm
Sunshine / day
8.5h
Mean relative humidity
71%
Average peak wind
16.1km/h
Seasonal range
27.2°C
Frost days (< 0 °C)
142 d/yr
Hot days (≥ 30 °C)
13 d/yr
Rainy days (≥ 1 mm)
123 d/yr
Annual snowfall
154.6 cm
Average feels-like high
10.4 °C
Average feels-like low
-0.2 °C
Average peak gust
40.1 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
14.0 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
37.8 °C
10 June 2008
Coldest day
-32.2 °C
7 February 1993
Wettest day
104 mm
8 October 2005
Windiest day
46.1 km/h
25 November 1950
Strongest gust
135.4 km/h
26 November 1950
Hottest feels-like
42.7 °C
1 July 2018
Coldest feels-like
-37.4 °C
7 February 1993
Snowiest day
42.1 cm
25 February 1981
Sunniest day
14.8 h
24 June 2021
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 | -1.8 °C | -0.1 °C | 42 mm | -40 mm |
| Feb | -0.6 °C | -0.4 °C | 92 mm | +14 mm |
| Mar | 8.5 °C | +3.8 °C | 82 mm | -11 mm |
| Apr | 13.7 °C | +1.9 °C | 101 mm | +9 mm |
| May | 17.8 °C | -0.7 °C | 231 mm | +140 mm |
| Jun | 24.6 °C | +1.0 °C | 64 mm | -21 mm |
| Jul | 29.2 °C | +2.8 °C | 78 mm | -8 mm |
| Aug | 26.2 °C | +0.9 °C | 20 mm | -61 mm |
| Sep | 23.5 °C | +2.6 °C | 65 mm | -15 mm |
| Oct | 15.5 °C | +1.1 °C | 102 mm | +15 mm |
| Nov | 6.7 °C | -0.7 °C | 64 mm | -30 mm |
| Dec | -0.5 °C | -1.4 °C | 82 mm | -13 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 Keene?
Keene has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.7 °C and it receives 1,045 mm of precipitation per year.
What is the hottest day ever recorded in Keene?
The hottest day measured in Keene between 1940 and 2025 was 10 June 2008, reaching 37.8 °C.
What is the coldest day in Keene?
The coldest day measured in Keene between 1940 and 2025 was 7 February 1993, at -32.2 °C.
Does it snow in Keene?
Yes. Keene gets on average 154.6 cm of snow per year and has around 142 frost days.
Has the climate of Keene warmed?
Yes: Keene warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Keene?
The wettest day measured in Keene between 1940 and 2025 was 8 October 2005, with 104 mm of rain in 24 hours.
What was the windiest day in Keene?
The windiest day measured in Keene between 1940 and 2025 was 25 November 1950, with winds reaching 46.1 km/h.
What is the warmest month in Keene?
The warmest month in Keene is July (21.1 °C on average); the coldest is January (-6.1 °C).
How much does it rain in Keene?
Keene receives on average 1,045 mm of precipitation per year, spread over about 123 rainy days.
Is it sunny in Keene?
Keene gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.
What is the biggest single-day snowfall in Keene?
The heaviest 24-hour snowfall measured in Keene between 1940 and 2025 was 25 February 1981, with 42.1 cm.
Are there tropical nights in Keene?
Yes: Keene has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Keene?
In Keene, between 1940 and 2025, the highest apparent temperature reached 42.7 °C on 1 July 2018, and the lowest was -37.4 °C on 7 February 1993.
Compare Keene with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Keene