Willoughby climate — normals and trends
Willoughby (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.0 °C and it receives 1,221 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 (23.4 °C on average) and the coldest is February (-3.3 °C). Rainfall peaks in November.
Willoughby averages 91 frost days, 2 hot days (≥ 30 °C) and 159 rainy days per year.
Willoughby has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The number of frost days there went from about 106 to 76 per year over the period.
The hottest day of the period reached 34.0 °C (on 16 July 1988) and the coldest -27.4 °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
WilloughbyOhio
- coords
- 41.64°, -81.41°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.0°C
Average daily high
12.3°C
Average daily low
8.1°C
Annual rainfall
1,221mm
Sunshine / day
8.8h
Mean relative humidity
76%
Average peak wind
29.6km/h
Seasonal range
26.7°C
Frost days (< 0 °C)
91 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
159 d/yr
Annual snowfall
113.2 cm
Average feels-like high
9.7 °C
Average feels-like low
4.1 °C
Average peak gust
41.6 km/h
Tropical nights (≥ 20 °C)
64 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.16 · 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
34.0 °C
16 July 1988
Coldest day
-27.4 °C
19 January 1994
Wettest day
80 mm
17 July 2021
Windiest day
81.2 km/h
26 January 1978
Strongest gust
123.1 km/h
26 January 1978
Hottest feels-like
39.1 °C
16 July 1988
Coldest feels-like
-36.2 °C
24 January 1963
Snowiest day
24.8 cm
25 November 1950
Sunniest day
15.0 h
16 June 1940
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 | -1.0 °C | -0.6 °C | 74 mm | -20 mm |
| Feb | 0.6 °C | +1.1 °C | 102 mm | +24 mm |
| Mar | 6.8 °C | +4.1 °C | 68 mm | -27 mm |
| Apr | 9.5 °C | +1.2 °C | 123 mm | +20 mm |
| May | 14.6 °C | -1.8 °C | 138 mm | +38 mm |
| Jun | 21.8 °C | -1.3 °C | 93 mm | -21 mm |
| Jul | 25.9 °C | +0.4 °C | 72 mm | -34 mm |
| Aug | 23.5 °C | -1.2 °C | 89 mm | -12 mm |
| Sep | 21.4 °C | +0.1 °C | 49 mm | -46 mm |
| Oct | 16.2 °C | +1.3 °C | 150 mm | +50 mm |
| Nov | 8.6 °C | +0.1 °C | 111 mm | -10 mm |
| Dec | 2.7 °C | -0.3 °C | 117 mm | +3 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 Willoughby?
Willoughby has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.0 °C and it receives 1,221 mm of precipitation per year.
What is the hottest day ever recorded in Willoughby?
The hottest day measured in Willoughby between 1940 and 2025 was 16 July 1988, reaching 34.0 °C.
What is the coldest day in Willoughby?
The coldest day measured in Willoughby between 1940 and 2025 was 19 January 1994, at -27.4 °C.
Does it snow in Willoughby?
Yes. Willoughby gets on average 113.2 cm of snow per year and has around 91 frost days.
Has the climate of Willoughby warmed?
Yes: Willoughby warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Willoughby?
The wettest day measured in Willoughby between 1940 and 2025 was 17 July 2021, with 80 mm of rain in 24 hours.
What was the windiest day in Willoughby?
The windiest day measured in Willoughby between 1940 and 2025 was 26 January 1978, with winds reaching 81.2 km/h.
What is the warmest month in Willoughby?
The warmest month in Willoughby is July (23.4 °C on average); the coldest is February (-3.3 °C).
How much does it rain in Willoughby?
Willoughby receives on average 1,221 mm of precipitation per year, spread over about 159 rainy days.
Is it sunny in Willoughby?
Willoughby gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Willoughby?
The heaviest 24-hour snowfall measured in Willoughby between 1940 and 2025 was 25 November 1950, with 24.8 cm.
Are there tropical nights in Willoughby?
Yes: Willoughby has on average 64 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Willoughby?
In Willoughby, between 1940 and 2025, the highest apparent temperature reached 39.1 °C on 16 July 1988, and the lowest was -36.2 °C on 24 January 1963.
Compare Willoughby with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Willoughby