Chester climate — normals and trends
Chester (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.9 °C and it receives 1,090 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 (25.8 °C on average) and the coldest is January (3.7 °C). Rainfall peaks in July.
Chester averages 57 frost days, 60 hot days (≥ 30 °C) and 118 rainy days per year.
Chester has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 61 to 53 per year over the period.
The hottest day of the period reached 40.3 °C (on 20 August 1983) and the coldest -22.2 °C (on 21 January 1985).
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
ChesterVirginia
- coords
- 37.36°, -77.44°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.9°C
Average daily high
20.2°C
Average daily low
10.2°C
Annual rainfall
1,090mm
Sunshine / day
9.1h
Mean relative humidity
69%
Average peak wind
15.1km/h
Seasonal range
22.1°C
Frost days (< 0 °C)
57 d/yr
Hot days (≥ 30 °C)
60 d/yr
Rainy days (≥ 1 mm)
118 d/yr
Annual snowfall
26.0 cm
Average feels-like high
19.8 °C
Average feels-like low
8.7 °C
Average peak gust
35.1 km/h
Tropical nights (≥ 20 °C)
69 d/yr
Solar radiation
15.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °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
40.3 °C
20 August 1983
Coldest day
-22.2 °C
21 January 1985
Wettest day
112 mm
11 October 2018
Windiest day
50.8 km/h
18 September 2003
Strongest gust
139.3 km/h
18 September 2003
Hottest feels-like
46.5 °C
29 June 2012
Coldest feels-like
-28.8 °C
21 January 1985
Snowiest day
27.7 cm
24 January 1940
Sunniest day
14.1 h
4 July 2025
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 | 6.9 °C | -1.5 °C | 63 mm | -22 mm |
| Feb | 11.2 °C | +0.9 °C | 117 mm | +36 mm |
| Mar | 18.8 °C | +3.9 °C | 90 mm | -6 mm |
| Apr | 23.3 °C | +2.7 °C | 117 mm | +35 mm |
| May | 24.6 °C | -0.3 °C | 188 mm | +95 mm |
| Jun | 30.5 °C | +1.4 °C | 98 mm | +10 mm |
| Jul | 32.1 °C | +1.2 °C | 138 mm | +24 mm |
| Aug | 27.7 °C | -2.1 °C | 64 mm | -44 mm |
| Sep | 26.3 °C | -0.2 °C | 145 mm | +45 mm |
| Oct | 20.5 °C | -0.6 °C | 55 mm | -26 mm |
| Nov | 16.4 °C | +0.9 °C | 44 mm | -38 mm |
| Dec | 9.0 °C | -1.2 °C | 61 mm | -20 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 Chester?
Chester has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.9 °C and it receives 1,090 mm of precipitation per year.
What is the hottest day ever recorded in Chester?
The hottest day measured in Chester between 1940 and 2025 was 20 August 1983, reaching 40.3 °C.
What is the coldest day in Chester?
The coldest day measured in Chester between 1940 and 2025 was 21 January 1985, at -22.2 °C.
Does it snow in Chester?
Yes. Chester gets on average 26.0 cm of snow per year and has around 57 frost days.
Has the climate of Chester warmed?
Yes: Chester warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chester?
The wettest day measured in Chester between 1940 and 2025 was 11 October 2018, with 112 mm of rain in 24 hours.
What was the windiest day in Chester?
The windiest day measured in Chester between 1940 and 2025 was 18 September 2003, with winds reaching 50.8 km/h.
What is the warmest month in Chester?
The warmest month in Chester is July (25.8 °C on average); the coldest is January (3.7 °C).
How much does it rain in Chester?
Chester receives on average 1,090 mm of precipitation per year, spread over about 118 rainy days.
Is it sunny in Chester?
Chester gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chester?
The heaviest 24-hour snowfall measured in Chester between 1940 and 2025 was 24 January 1940, with 27.7 cm.
Are there tropical nights in Chester?
Yes: Chester has on average 69 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chester?
In Chester, between 1940 and 2025, the highest apparent temperature reached 46.5 °C on 29 June 2012, and the lowest was -28.8 °C on 21 January 1985.
Compare Chester with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chester