More snow falls on Saint-Boniface than on 90% of Canadian towns: about 274 cm a year
Sunny July days climb to about 25.1°C. It is a wet place: more rain and snow fall here than on 80% of Canadian towns. The seasons are far apart: from a winter night to a summer afternoon the average spans 39°C. Expect about 145 frosty starts a year, days when the air falls to freezing.
These are not Saint-Boniface’s own readings: ECCC keeps no normals there, so the page uses Trois-Rivières, 29 km south-east.
A year in Saint-Boniface at a glance
Each month’s typical high and low, in °C.
What stands out about Saint-Boniface’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Saint-Boniface feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 145 frosts and 104 warm days a year
Frost comes from October to April; in January almost every night freezes. On about 15 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 1,101 mm a year
The most falls in July, the least in February. About 132 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
274 cm of snow in a typical year
From October to April snow is likely; December is the peak, at about 69 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Saint-Boniface
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Behind the figure: the degrees each day’s mean falls under 18°C, summed for the year.
Living with Saint-Boniface’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Plan time outside for Jun, Jul, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →Winter brings about 42 days with a wind chill below −20.
Count on some 37 humid days a year with the humidex past 30.
The normals describe a typical year, not its worst days; the hazards page covers Saint-Boniface’s.
Flood & hazards →ECCC’s normals location: Trois-Rivières
Behind the 1991–2020 normals for Trois-Rivières are 2 stations, which ECCC combines into one record.
| Distance from the town | 29 km south-east |
| Station altitude | 6 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −32.3°C |
| Hottest reading, 1991–2020 | 34.0°C |
| Average wind | 13.4 km/h on average, most often from the south-west |
| Next-nearest location | Nicolet, 37 km |
How Saint-Boniface 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
Nearby places read from a different ECCC location (places on Saint-Boniface’s own would show the same figures). No closer place has figures: this one lies 23 km from Saint-Boniface.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Saint-Boniface Trois-Rivières | 25.1°C | −14.1°C | 1,101 mm |
| Yamachiche 23 km · Nicolet | 25.7°C 0.6°C warmer | −16.4°C 2.3°C colder | 948 mm |
Saint-Boniface 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 | −5.6°C | −14.1°C | −9.9°C | 83 mm | 61 cm |
| February | −3.9°C | −13.1°C | −8.5°C | 66 mm | 53 cm |
| March | 1.2°C | −7.3°C | −3.1°C | 76 mm | 50 cm |
| April | 8.8°C | 0.3°C | 4.6°C | 87 mm | 14 cm |
| May | 17.3°C | 7.9°C | 12.6°C | 83 mm | under 1 cm |
| June | 22.5°C | 13.6°C | 18.1°C | 105 mm | 0 cm |
| July | 25.1°C | 16.7°C | 20.9°C | 125 mm | 0 cm |
| August | 24.1°C | 15.6°C | 19.9°C | 96 mm | 0 cm |
| September | 19.8°C | 11.0°C | 15.5°C | 97 mm | 0 cm |
| October | 12.2°C | 5.1°C | 8.5°C | 101 mm | 4 cm |
| November | 4.9°C | −1.3°C | 1.8°C | 88 mm | 24 cm |
| December | −2.0°C | −8.6°C | −5.3°C | 95 mm | 69 cm |
| Year | 10.4°C | 2.1°C | 6.2°C | 1,101 mm | 274 cm |
January strays furthest from its normal year to year, by 2.8°C; June the least
Each bar spans a month’s coldest and warmest readings over thirty years; January’s run from −32.3°C in 2009 to 12.0°C in 1996.
Where Saint-Boniface’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Trois-Rivières, 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
- Not on this page: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Saint-Boniface’s climate
How warm does Saint-Boniface get in summer?
Midsummer means July, with afternoons near 25.1°C on a typical day.
How cold does Saint-Boniface get in winter?
Midwinter means January, when a typical night reaches −14.1°C.
How much rain and snow does Saint-Boniface get?
The yearly total is about 1,101 mm. July gets 125 mm, the most of any month; February gets 66 mm, the least.
Are these figures for Saint-Boniface itself?
They come from Trois-Rivières, which ECCC uses as the nearest normals location for Saint-Boniface.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Saint-Boniface →
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).