Summer arrives in force in Roberval, hotter than in 78% of Canadian towns
Nights in January average −13.5°C. Seasons differ by 40°C, from the coldest nights to the warmest afternoons. Precipitation is plentiful here, more than falls on 74% of Canadian towns. Plan for rain or snow on about 122 days a year, the days with 1 mm or more.
These are not Roberval’s own readings: ECCC keeps no normals there, so the page uses Montréal Trudeau (Airport), 25 km west.
A year in Roberval at a glance
Each month’s typical high and low, in °C.
What stands out about Roberval’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Roberval feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
146 frost days and 121 days above 20°C a year
From October to April frost is routine, and in January it comes on almost every night. Deep cold, under −20°C, comes on about 12 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 1,041 mm a year
The most falls in October, the least in February.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
217 cm of snow in a typical year
From October to April snow is likely; January is the peak, at about 52 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Roberval
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A day averaging 10 degrees under 18°C adds 10 to the total; warm days add nothing. In heating terms, homes need less heating than 62% of Canadian towns.
Living with Roberval’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Count on about 167 frost-free days: the last frost averages 29 April, the first 14 October.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to May, Jun, Jul, Aug and Sep.
Parks & trails →Frostbite weather, a wind chill under −20, turns up on about 40 days a year.
Plan shade and water for about 50 days a year above 30 on the humidex.
Severe weather is a separate story from the averages: see Roberval’s hazards page.
Flood & hazards →ECCC’s normals location: Montréal Trudeau (Airport)
Behind the 1991–2020 normals for Montréal Trudeau (Airport) are 3 stations, which ECCC combines into one record.
| Distance from the town | 25 km west |
| Station altitude | 36 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −31.8°C |
| Hottest reading, 1991–2020 | 36.6°C |
| Average wind | 15.4 km/h on average, most often from the west |
| Next-nearest location | L'Acadie, 26 km |
How Roberval compares
Placed among 2,611 Canadian towns and neighbourhoods of 2,500+, each on its nearest normals location; each dot is another location used in Quebec.
Nearby towns’ climate
Places around Roberval whose figures come from another normals location. The nearest places to Roberval with figures are 7–12 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Roberval Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Brossard 7.0 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
| Boucherville 8.9 km · L'Assomption | 26.6°C about the same | −16.0°C 2.5°C colder | 1,041 mm |
Roberval weather by month
Month by month, 1991–2020: the usual high, low and mean, the rain and snow, and the snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −5.0°C | −13.5°C | −9.2°C | 86 mm | 52 cm |
| February | −3.4°C | −12.4°C | −8.0°C | 66 mm | 47 cm |
| March | 2.4°C | −6.5°C | −2.0°C | 77 mm | 37 cm |
| April | 11.3°C | 1.1°C | 6.2°C | 90 mm | 15 cm |
| May | 19.4°C | 8.3°C | 13.9°C | 86 mm | 0 cm |
| June | 24.2°C | 13.8°C | 19.0°C | 84 mm | 0 cm |
| July | 26.7°C | 16.7°C | 21.7°C | 91 mm | 0 cm |
| August | 25.7°C | 15.6°C | 20.6°C | 94 mm | 0 cm |
| September | 21.1°C | 10.9°C | 16.0°C | 89 mm | 0 cm |
| October | 13.2°C | 4.5°C | 8.9°C | 103 mm | 1 cm |
| November | 6.1°C | −1.7°C | 2.3°C | 84 mm | 16 cm |
| December | −1.2°C | −8.7°C | −5.0°C | 92 mm | 48 cm |
| Year | 11.7°C | 2.3°C | 7.0°C | 1,041 mm | 217 cm |
January strays furthest from its normal year to year, by 3.0°C; June the least
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −26.9°C in 1992 to 25.8°C in 2012.
Where Roberval’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Montréal Trudeau (Airport), 1991–2020.
- Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
- Not on this page: sunshine (no 1991–2020 normals exist for it) and any altitude adjustment, since there is no elevation for the town itself.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Roberval’s climate
How warm does Roberval get in summer?
Peak warmth comes in July, at about 26.7°C by mid-afternoon.
How cold does Roberval get in winter?
A typical January night falls to −13.5°C, the year’s low point.
How much rain and snow does Roberval get?
Rain and snow add up to about 1,041 mm of water a year; October brings the most (103 mm), February the least (66 mm).
How long does snow stay on the ground?
About 101 days a year count as snow-covered, with 1 cm or more.
Are these figures for Roberval itself?
They are borrowed from Montréal Trudeau (Airport), the nearest place to Roberval where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Roberval →
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).