Alliance climate — normals and trends
Alliance (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 1,089 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 (22.2 °C on average) and the coldest is January (-2.9 °C). Rainfall peaks in May.
Alliance averages 112 frost days, 19 hot days (≥ 30 °C) and 144 rainy days per year.
Alliance has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 125 to 99 per year over the period.
The hottest day of the period reached 38.1 °C (on 16 July 1988) and the coldest -30.0 °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
AllianceOhio
- coords
- 40.92°, -81.11°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.0°C
Average daily high
15.0°C
Average daily low
5.5°C
Annual rainfall
1,089mm
Sunshine / day
8.4h
Mean relative humidity
72%
Average peak wind
16.3km/h
Seasonal range
25.1°C
Frost days (< 0 °C)
112 d/yr
Hot days (≥ 30 °C)
19 d/yr
Rainy days (≥ 1 mm)
144 d/yr
Annual snowfall
85.2 cm
Average feels-like high
13.2 °C
Average feels-like low
2.8 °C
Average peak gust
38.6 km/h
Tropical nights (≥ 20 °C)
16 d/yr
Solar radiation
14.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.39 · 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
38.1 °C
16 July 1988
Coldest day
-30.0 °C
19 January 1994
Wettest day
113 mm
14 September 1979
Windiest day
44.2 km/h
3 April 1975
Strongest gust
107.3 km/h
22 December 2013
Hottest feels-like
42.6 °C
15 July 1995
Coldest feels-like
-35.9 °C
19 January 1994
Snowiest day
29.1 cm
25 November 1950
Sunniest day
14.9 h
24 June 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 | -1.8 °C | -2.8 °C | 48 mm | -32 mm |
| Feb | 2.2 °C | -0.6 °C | 99 mm | +27 mm |
| Mar | 13.1 °C | +4.8 °C | 66 mm | -34 mm |
| Apr | 16.6 °C | +1.6 °C | 121 mm | +15 mm |
| May | 19.5 °C | -1.1 °C | 183 mm | +71 mm |
| Jun | 27.2 °C | +1.9 °C | 142 mm | +35 mm |
| Jul | 28.9 °C | +1.4 °C | 95 mm | -4 mm |
| Aug | 26.8 °C | +0.2 °C | 21 mm | -68 mm |
| Sep | 25.9 °C | +2.9 °C | 55 mm | -28 mm |
| Oct | 17.7 °C | +1.1 °C | 97 mm | +22 mm |
| Nov | 8.9 °C | -0.5 °C | 57 mm | -28 mm |
| Dec | 2.8 °C | -0.5 °C | 74 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 Alliance?
Alliance has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.0 °C and it receives 1,089 mm of precipitation per year.
What is the hottest day ever recorded in Alliance?
The hottest day measured in Alliance between 1940 and 2025 was 16 July 1988, reaching 38.1 °C.
What is the coldest day in Alliance?
The coldest day measured in Alliance between 1940 and 2025 was 19 January 1994, at -30.0 °C.
Does it snow in Alliance?
Yes. Alliance gets on average 85.2 cm of snow per year and has around 112 frost days.
Has the climate of Alliance warmed?
Yes: Alliance warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Alliance?
The wettest day measured in Alliance between 1940 and 2025 was 14 September 1979, with 113 mm of rain in 24 hours.
What was the windiest day in Alliance?
The windiest day measured in Alliance between 1940 and 2025 was 3 April 1975, with winds reaching 44.2 km/h.
What is the warmest month in Alliance?
The warmest month in Alliance is July (22.2 °C on average); the coldest is January (-2.9 °C).
How much does it rain in Alliance?
Alliance receives on average 1,089 mm of precipitation per year, spread over about 144 rainy days.
Is it sunny in Alliance?
Alliance 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 Alliance?
The heaviest 24-hour snowfall measured in Alliance between 1940 and 2025 was 25 November 1950, with 29.1 cm.
Are there tropical nights in Alliance?
Yes: Alliance has on average 16 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Alliance?
In Alliance, between 1940 and 2025, the highest apparent temperature reached 42.6 °C on 15 July 1995, and the lowest was -35.9 °C on 19 January 1994.
Compare Alliance with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Alliance