Andover climate — normals and trends
Andover (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 6.9 °C and it receives 832 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 (22.4 °C on average) and the coldest is January (-10.6 °C). Rainfall peaks in June.
Andover averages 150 frost days, 19 hot days (≥ 30 °C) and 106 rainy days per year.
Andover has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 158 to 142 per year over the period.
The hottest day of the period reached 38.5 °C (on 15 July 1988) and the coldest -36.6 °C (on 30 January 1951).
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
AndoverMinnesota
- coords
- 45.23°, -93.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.9°C
Average daily high
11.7°C
Average daily low
2.2°C
Annual rainfall
832mm
Sunshine / day
8.7h
Mean relative humidity
70%
Average peak wind
18.2km/h
Seasonal range
33.0°C
Frost days (< 0 °C)
150 d/yr
Hot days (≥ 30 °C)
19 d/yr
Rainy days (≥ 1 mm)
106 d/yr
Annual snowfall
93.6 cm
Average feels-like high
9.2 °C
Average feels-like low
-1.0 °C
Average peak gust
37.8 km/h
Tropical nights (≥ 20 °C)
15 d/yr
Solar radiation
14.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.32 · 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
38.5 °C
15 July 1988
Coldest day
-36.6 °C
30 January 1951
Wettest day
105 mm
1 August 2024
Windiest day
56.6 km/h
10 October 1949
Strongest gust
107.6 km/h
10 October 1949
Hottest feels-like
43.5 °C
1 July 2011
Coldest feels-like
-42.3 °C
30 January 1951
Snowiest day
28.3 cm
1 November 1991
Sunniest day
15.1 h
13 June 2024
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -5.2 °C | +1.1 °C | 9 mm | -17 mm |
| Feb | -4.7 °C | -1.4 °C | 21 mm | -3 mm |
| Mar | 8.9 °C | +5.3 °C | 64 mm | +10 mm |
| Apr | 13.2 °C | +0.8 °C | 118 mm | +35 mm |
| May | 20.9 °C | +1.2 °C | 78 mm | -23 mm |
| Jun | 24.9 °C | 0.0 °C | 186 mm | +70 mm |
| Jul | 28.1 °C | +0.6 °C | 82 mm | -11 mm |
| Aug | 25.9 °C | -0.3 °C | 83 mm | -21 mm |
| Sep | 23.6 °C | +2.5 °C | 75 mm | -12 mm |
| Oct | 16.3 °C | +2.2 °C | 38 mm | -25 mm |
| Nov | 6.9 °C | +2.8 °C | 37 mm | -13 mm |
| Dec | -4.0 °C | -0.5 °C | 43 mm | +11 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 Andover?
Andover has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 6.9 °C and it receives 832 mm of precipitation per year.
What is the hottest day ever recorded in Andover?
The hottest day measured in Andover between 1940 and 2025 was 15 July 1988, reaching 38.5 °C.
What is the coldest day in Andover?
The coldest day measured in Andover between 1940 and 2025 was 30 January 1951, at -36.6 °C.
Does it snow in Andover?
Yes. Andover gets on average 93.6 cm of snow per year and has around 150 frost days.
Has the climate of Andover warmed?
Yes: Andover warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Andover?
The wettest day measured in Andover between 1940 and 2025 was 1 August 2024, with 105 mm of rain in 24 hours.
What was the windiest day in Andover?
The windiest day measured in Andover between 1940 and 2025 was 10 October 1949, with winds reaching 56.6 km/h.
What is the warmest month in Andover?
The warmest month in Andover is July (22.4 °C on average); the coldest is January (-10.6 °C).
How much does it rain in Andover?
Andover receives on average 832 mm of precipitation per year, spread over about 106 rainy days.
Is it sunny in Andover?
Andover 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 Andover?
The heaviest 24-hour snowfall measured in Andover between 1940 and 2025 was 1 November 1991, with 28.3 cm.
Are there tropical nights in Andover?
Yes: Andover has on average 15 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Andover?
In Andover, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 1 July 2011, and the lowest was -42.3 °C on 30 January 1951.
Compare Andover with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Andover