Granby climate — normals and trends
Granby (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.2 °C and it receives 1,140 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 (20.3 °C on average) and the coldest is January (-9.4 °C). Rainfall peaks in July.
Granby averages 153 frost days, 5 hot days (≥ 30 °C) and 152 rainy days per year.
Granby 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 163 to 143 per year over the period.
The hottest day of the period reached 35.6 °C (on 27 May 2020) and the coldest -37.3 °C (on 27 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
GranbyQuebec
- coords
- 45.40°, -72.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.2°C
Average daily high
10.8°C
Average daily low
1.3°C
Annual rainfall
1,140mm
Sunshine / day
8.3h
Mean relative humidity
74%
Average peak wind
16.8km/h
Seasonal range
29.7°C
Frost days (< 0 °C)
153 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
152 d/yr
Annual snowfall
166.7 cm
Average feels-like high
8.4 °C
Average feels-like low
-2.0 °C
Average peak gust
37.9 km/h
Tropical nights (≥ 20 °C)
5 d/yr
Solar radiation
13.2 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
35.6 °C
27 May 2020
Coldest day
-37.3 °C
27 January 1994
Wettest day
93 mm
28 August 2011
Windiest day
46.7 km/h
1 November 2019
Strongest gust
118.4 km/h
23 December 2022
Hottest feels-like
41.0 °C
1 August 1975
Coldest feels-like
-42.0 °C
27 January 1994
Snowiest day
27.4 cm
21 November 1986
Sunniest day
15.4 h
25 June 2018
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 | -5.5 °C | -0.3 °C | 61 mm | -14 mm |
| Feb | -4.8 °C | -1.2 °C | 87 mm | +18 mm |
| Mar | 5.2 °C | +2.9 °C | 97 mm | +17 mm |
| Apr | 11.5 °C | +1.1 °C | 104 mm | +8 mm |
| May | 18.1 °C | 0.0 °C | 122 mm | +22 mm |
| Jun | 24.1 °C | +1.3 °C | 100 mm | -10 mm |
| Jul | 26.4 °C | +1.3 °C | 97 mm | -15 mm |
| Aug | 25.5 °C | +1.7 °C | 47 mm | -63 mm |
| Sep | 22.0 °C | +2.5 °C | 50 mm | -51 mm |
| Oct | 15.2 °C | +2.5 °C | 140 mm | +39 mm |
| Nov | 3.1 °C | -2.1 °C | 119 mm | +22 mm |
| Dec | -3.3 °C | -1.2 °C | 83 mm | -7 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 Granby?
Granby has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.2 °C and it receives 1,140 mm of precipitation per year.
What is the hottest day ever recorded in Granby?
The hottest day measured in Granby between 1940 and 2025 was 27 May 2020, reaching 35.6 °C.
What is the coldest day in Granby?
The coldest day measured in Granby between 1940 and 2025 was 27 January 1994, at -37.3 °C.
Does it snow in Granby?
Yes. Granby gets on average 166.7 cm of snow per year and has around 153 frost days.
Has the climate of Granby warmed?
Yes: Granby warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Granby?
The wettest day measured in Granby between 1940 and 2025 was 28 August 2011, with 93 mm of rain in 24 hours.
What was the windiest day in Granby?
The windiest day measured in Granby between 1940 and 2025 was 1 November 2019, with winds reaching 46.7 km/h.
What is the warmest month in Granby?
The warmest month in Granby is July (20.3 °C on average); the coldest is January (-9.4 °C).
How much does it rain in Granby?
Granby receives on average 1,140 mm of precipitation per year, spread over about 152 rainy days.
Is it sunny in Granby?
Granby gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.
What is the biggest single-day snowfall in Granby?
The heaviest 24-hour snowfall measured in Granby between 1940 and 2025 was 21 November 1986, with 27.4 cm.
Are there tropical nights in Granby?
Yes: Granby has on average 5 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Granby?
In Granby, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 1 August 1975, and the lowest was -42.0 °C on 27 January 1994.
Compare Granby with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Granby