Summer afternoons in Guybourg are warmer than in 78% of Canadian towns
The coldest hours of a January night bottom out at −13.5°C on average. Precipitation peaks in October and eases off in February. Rain and snow together come to more here than on 74% of Canadian towns. Have the furnace checked before October to April, the months that average under 10°C.
Figures: ECCC’s 1991–2020 normals for Montréal Trudeau (Airport) (21 km south-west).
A year in Guybourg at a glance
Each month’s typical high and low, in °C.
What stands out about Guybourg’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Guybourg feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
About 146 frosts and 121 warm days a year
The frost season runs October to April, and January freezes nearly every night. Some 12 nights a year drop under −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 1,041 mm a year
On about 122 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 217 cm of snow a year
The snow season runs October to April; January brings the most, about 52 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Guybourg
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Every day colder than 18°C on average adds its gap in degrees to the year’s heating total. By this count, homes here need less heating than 62% of Canadian towns.
Living with Guybourg’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Wait until about 29 April to plant out; frost tends to come back around 14 October, about 167 days later.
Highs of 17–27°C with nights of 8°C or more come in May, Jun, Jul, Aug and Sep.
Parks & trails →Roughly 40 days a year feel colder than −20 in the wind.
A humidex above 30 marks about 50 days in a normal year.
Storms, floods and heat waves sit outside these normals; Guybourg’s hazards page covers them.
Flood & hazards →ECCC’s normals location: Montréal Trudeau (Airport)
Montréal Trudeau (Airport) is a composite: ECCC joins 3 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 21 km south-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'Assomption, 28 km |
How Guybourg 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 Guybourg whose figures come from another normals location. The nearest places to Guybourg with figures are 7–15 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Guybourg Montréal Trudeau (Airport) | 26.7°C | −13.5°C | 1,041 mm |
| Montréal-Est 6.7 km · L'Assomption | 26.6°C about the same | −16.0°C 2.5°C colder | 1,041 mm |
| Brossard 14 km · L'Acadie | 26.6°C about the same | −13.6°C about the same | 1,041 mm |
Guybourg weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and 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 |
The most changeable month: January, give or take 3.0°C; the steadiest, June
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 Guybourg’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Montréal Trudeau (Airport), the closest ECCC location with twelve months of temperature normals.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- Not on this page: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Guybourg’s climate
How warm does Guybourg get in summer?
Highs reach 26.7°C on an average July day; no month is warmer.
How cold does Guybourg get in winter?
Expect nights around −13.5°C in January; no month is colder.
How much rain and snow does Guybourg 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?
Count on about 101 days of snow cover a year, 1 cm or deeper.
Are these figures for Guybourg itself?
They are the normals for Montréal Trudeau (Airport), measured just outside Guybourg itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Guybourg →
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).