Ashtabula climate — normals and trends
Ashtabula (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.5 °C and it receives 1,195 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 (-3.3 °C). Rainfall peaks in June.
Ashtabula averages 110 frost days, 10 hot days (≥ 30 °C) and 161 rainy days per year.
Ashtabula has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 124 to 96 per year over the period.
The hottest day of the period reached 37.5 °C (on 25 June 1988) and the coldest -28.0 °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
AshtabulaOhio
- coords
- 41.87°, -80.79°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.5°C
Average daily high
13.7°C
Average daily low
5.6°C
Annual rainfall
1,195mm
Sunshine / day
8.4h
Mean relative humidity
74%
Average peak wind
18.5km/h
Seasonal range
25.1°C
Frost days (< 0 °C)
110 d/yr
Hot days (≥ 30 °C)
10 d/yr
Rainy days (≥ 1 mm)
161 d/yr
Annual snowfall
122.1 cm
Average feels-like high
11.9 °C
Average feels-like low
2.6 °C
Average peak gust
41.1 km/h
Tropical nights (≥ 20 °C)
18 d/yr
Solar radiation
14.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.34 · 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
37.5 °C
25 June 1988
Coldest day
-28.0 °C
19 January 1994
Wettest day
87 mm
14 September 1979
Windiest day
50.3 km/h
6 April 1979
Strongest gust
120.2 km/h
14 January 1940
Hottest feels-like
41.3 °C
14 July 1995
Coldest feels-like
-34.9 °C
21 January 1985
Snowiest day
31.4 cm
25 November 1950
Sunniest day
14.9 h
6 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 | -2.0 °C | -2.2 °C | 61 mm | -24 mm |
| Feb | 0.9 °C | -0.4 °C | 92 mm | +17 mm |
| Mar | 11.4 °C | +5.1 °C | 80 mm | -16 mm |
| Apr | 14.1 °C | +1.2 °C | 133 mm | +26 mm |
| May | 17.5 °C | -1.4 °C | 180 mm | +70 mm |
| Jun | 25.0 °C | +1.0 °C | 151 mm | +28 mm |
| Jul | 27.5 °C | +1.4 °C | 94 mm | -20 mm |
| Aug | 25.0 °C | -0.2 °C | 75 mm | -33 mm |
| Sep | 23.6 °C | +1.9 °C | 48 mm | -47 mm |
| Oct | 16.8 °C | +1.1 °C | 124 mm | +35 mm |
| Nov | 8.0 °C | -0.8 °C | 79 mm | -21 mm |
| Dec | 2.1 °C | -0.7 °C | 102 mm | +8 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 Ashtabula?
Ashtabula has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.5 °C and it receives 1,195 mm of precipitation per year.
What is the hottest day ever recorded in Ashtabula?
The hottest day measured in Ashtabula between 1940 and 2025 was 25 June 1988, reaching 37.5 °C.
What is the coldest day in Ashtabula?
The coldest day measured in Ashtabula between 1940 and 2025 was 19 January 1994, at -28.0 °C.
Does it snow in Ashtabula?
Yes. Ashtabula gets on average 122.1 cm of snow per year and has around 110 frost days.
Has the climate of Ashtabula warmed?
Yes: Ashtabula warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ashtabula?
The wettest day measured in Ashtabula between 1940 and 2025 was 14 September 1979, with 87 mm of rain in 24 hours.
What was the windiest day in Ashtabula?
The windiest day measured in Ashtabula between 1940 and 2025 was 6 April 1979, with winds reaching 50.3 km/h.
What is the warmest month in Ashtabula?
The warmest month in Ashtabula is July (21.8 °C on average); the coldest is January (-3.3 °C).
How much does it rain in Ashtabula?
Ashtabula receives on average 1,195 mm of precipitation per year, spread over about 161 rainy days.
Is it sunny in Ashtabula?
Ashtabula gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ashtabula?
The heaviest 24-hour snowfall measured in Ashtabula between 1940 and 2025 was 25 November 1950, with 31.4 cm.
Are there tropical nights in Ashtabula?
Yes: Ashtabula has on average 18 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ashtabula?
In Ashtabula, between 1940 and 2025, the highest apparent temperature reached 41.3 °C on 14 July 1995, and the lowest was -34.9 °C on 21 January 1985.
Compare Ashtabula with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ashtabula