Huntsville climate — normals and trends
Huntsville (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.1 °C and it receives 1,036 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 (18.7 °C on average) and the coldest is January (-9.8 °C). Rainfall peaks in August.
Huntsville averages 155 frost days, 0 hot days (≥ 30 °C) and 149 rainy days per year.
Huntsville 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 161 to 149 per year over the period.
The hottest day of the period reached 31.7 °C (on 12 July 2005) and the coldest -35.0 °C (on 16 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
HuntsvilleOntario
- coords
- 45.33°, -79.22°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.1°C
Average daily high
9.2°C
Average daily low
1.1°C
Annual rainfall
1,036mm
Sunshine / day
8.2h
Mean relative humidity
78%
Average peak wind
16.6km/h
Seasonal range
28.5°C
Frost days (< 0 °C)
155 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
149 d/yr
Annual snowfall
172.4 cm
Average feels-like high
6.6 °C
Average feels-like low
-2.2 °C
Average peak gust
37.2 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
13.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.24 · 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
31.7 °C
12 July 2005
Coldest day
-35.0 °C
16 January 1994
Wettest day
92 mm
11 September 1986
Windiest day
43.2 km/h
6 May 1950
Strongest gust
100.1 km/h
10 November 1975
Hottest feels-like
37.1 °C
1 August 1975
Coldest feels-like
-40.3 °C
16 January 1994
Snowiest day
31.7 cm
25 February 1965
Sunniest day
15.1 h
15 June 2024
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 | -6.4 °C | -0.5 °C | 60 mm | -12 mm |
| Feb | -6.1 °C | -1.5 °C | 79 mm | +22 mm |
| Mar | 2.6 °C | +1.9 °C | 126 mm | +54 mm |
| Apr | 8.4 °C | +0.3 °C | 100 mm | +20 mm |
| May | 15.5 °C | +0.5 °C | 98 mm | +12 mm |
| Jun | 21.4 °C | +1.4 °C | 95 mm | -2 mm |
| Jul | 24.6 °C | +1.7 °C | 76 mm | -22 mm |
| Aug | 22.8 °C | +0.6 °C | 87 mm | -13 mm |
| Sep | 20.2 °C | +2.1 °C | 63 mm | -37 mm |
| Oct | 14.0 °C | +2.4 °C | 78 mm | -17 mm |
| Nov | 3.1 °C | -1.3 °C | 88 mm | -8 mm |
| Dec | -3.6 °C | -1.2 °C | 96 mm | +12 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 Huntsville?
Huntsville has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.1 °C and it receives 1,036 mm of precipitation per year.
What is the hottest day ever recorded in Huntsville?
The hottest day measured in Huntsville between 1940 and 2025 was 12 July 2005, reaching 31.7 °C.
What is the coldest day in Huntsville?
The coldest day measured in Huntsville between 1940 and 2025 was 16 January 1994, at -35.0 °C.
Does it snow in Huntsville?
Yes. Huntsville gets on average 172.4 cm of snow per year and has around 155 frost days.
Has the climate of Huntsville warmed?
Yes: Huntsville warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Huntsville?
The wettest day measured in Huntsville between 1940 and 2025 was 11 September 1986, with 92 mm of rain in 24 hours.
What was the windiest day in Huntsville?
The windiest day measured in Huntsville between 1940 and 2025 was 6 May 1950, with winds reaching 43.2 km/h.
What is the warmest month in Huntsville?
The warmest month in Huntsville is July (18.7 °C on average); the coldest is January (-9.8 °C).
How much does it rain in Huntsville?
Huntsville receives on average 1,036 mm of precipitation per year, spread over about 149 rainy days.
Is it sunny in Huntsville?
Huntsville gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
What is the biggest single-day snowfall in Huntsville?
The heaviest 24-hour snowfall measured in Huntsville between 1940 and 2025 was 25 February 1965, with 31.7 cm.
Are there tropical nights in Huntsville?
Yes: Huntsville has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Huntsville?
In Huntsville, between 1940 and 2025, the highest apparent temperature reached 37.1 °C on 1 August 1975, and the lowest was -40.3 °C on 16 January 1994.
Compare Huntsville with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Huntsville