Photo: art_inthecity from Montréal, CA · CC BY 2.0More rain and snow fall on Granby than on 91% of Canadian towns: 1,226 mm a year
January mornings start at about −13.4°C. A year here swings 39°C from midwinter lows to midsummer highs. For walks and days out, the stretch from May to September brings highs of 19–26°C.
1991–2020 normals from ECCC’s Granby station, 2.7 km south.
A year in Granby at a glance
Each month’s typical high and low, in °C.
What stands out about Granby’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Granby feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 154 days, 20°C on 111
The frost season runs October to May, and January freezes nearly every night. On about 14 nights a year the air falls below −20°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 1,226 mm a year
The most falls in July, the least in February. On about 145 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
262 cm of snow in a typical year
Expect snow from October to April, with about 59 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Granby
92% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Think of it as a year’s worth of daily shortfalls below 18°C, added up.
Living with Granby’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
The frost-free stretch runs from about 6 May to about 8 October, some 154 days in a normal year.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: May, Jun, Jul, Aug and Sep.
Parks & trails →A normal year has no blizzard, flood or heat wave in it; Granby’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Granby
The page’s figures are ECCC’s 1991–2020 normals for Granby, one of its 450 normals locations.
| Distance from the town | 2.7 km south |
| Station altitude | 175 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −34.0°C |
| Hottest reading, 1991–2020 | 35.0°C |
| Next-nearest location | Sutton, 37 km |
How Granby compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Quebec.
Nearby towns’ climate
Places around Granby whose figures come from another normals location. Distances here run 22–28 km: that is how far the nearest places with figures are from Granby.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Granby | 25.6°C | −13.4°C | 1,226 mm |
| Cowansville 22 km · Sutton | 25.3°C about the same | −13.5°C about the same | 1,340 mm |
| Sainte-Brigide-d'Iberville 28 km · L'Acadie | 26.6°C 1.0°C warmer | −13.6°C about the same | 1,226 mm |
| Saint-Liboire 28 km · Fleury | 26.0°C about the same | −14.8°C 1.4°C colder | 1,109 mm |
Granby weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −4.6°C | −13.4°C | −9.1°C | 95 mm | 59 cm |
| February | −3.2°C | −11.9°C | −7.4°C | 74 mm | 58 cm |
| March | 2.2°C | −6.4°C | −2.2°C | 88 mm | 48 cm |
| April | 10.5°C | 0.9°C | 5.9°C | 101 mm | 17 cm |
| May | 18.7°C | 8.0°C | 13.1°C | 100 mm | 1 cm |
| June | 23.3°C | 13.0°C | 18.3°C | 121 mm | 0 cm |
| July | 25.6°C | 15.7°C | 20.4°C | 122 mm | 0 cm |
| August | 24.6°C | 14.8°C | 19.5°C | 113 mm | 0 cm |
| September | 20.3°C | 10.6°C | 15.4°C | 113 mm | 0 cm |
| October | 12.8°C | 4.6°C | 8.6°C | 109 mm | 4 cm |
| November | 5.8°C | −1.5°C | 2.2°C | 92 mm | 22 cm |
| December | −1.0°C | −8.4°C | −4.9°C | 98 mm | 54 cm |
| Year | 11.3°C | 2.2°C | 6.6°C | 1,226 mm | 262 cm |
In March, anything from −27.5°C to 25.0°C
January is the least predictable month: about two years in three its average lands within 3.4°C of the normal, −9.1°C. August is the steadiest, within 1.0°C.
Where Granby’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Granby, 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- Not on this page: sunshine, not in ECCC’s 1991–2020 normals, and the effect of the town’s height, for which there is no figure.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Granby’s climate
How warm does Granby get in summer?
Expect highs near 25.6°C in July, the hottest month on average.
How cold does Granby get in winter?
Midwinter means January, when a typical night reaches −13.4°C.
How much rain and snow does Granby get?
Count on roughly 1,226 mm a year, heaviest in July (122 mm) and lightest in February (74 mm).
How long does snow stay on the ground?
In a normal winter there are about 113 days with at least 1 cm of snow lying.
Are these figures for Granby itself?
They are: the normals station that gives them stands in Granby.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Granby →
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).