Winter nights in Grassie are colder than in 95% of Canadian towns
High summer brings afternoon highs near 25.8°C. Precipitation peaks in July and eases off in February. Counting rain and snow together, it is drier than 72% of Canadian towns. Expect about 193 frosty starts a year, days when the air falls to freezing.
Read at Winnipeg Richardson (Airport), 14 km west: ECCC’s normals for 1991–2020.
A year in Grassie at a glance
Each month’s typical high and low, in °C.
What stands out about Grassie’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Manitoba beside it.
What a year in Grassie feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 193 frosts and 110 warm days a year
The frost season runs September to May, and January freezes nearly every night. On about 52 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
519 mm of precipitation in a typical year
On about 80 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 126 cm of snow a year
Expect snow from October to May, with about 27 cm in December, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Grassie
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The count adds up, day by day, how far the mean temperature falls short of 18°C. In heating terms, homes need more heating than 89% of Canadian towns.
Living with Grassie’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
About 122 days a year pass without frost, from an average last frost of 23 May to a first of 22 September.
Plan time outside for Jun, Jul and Aug: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →Bitter wind chill, under −20, comes on about 86 days a year.
On some 37 days a year the humidex climbs past 30.
The normals describe a typical year, not its worst days; the hazards page covers Grassie’s.
Flood & hazards →ECCC’s normals location: Winnipeg Richardson (Airport)
Behind the 1991–2020 normals for Winnipeg Richardson (Airport) are 4 stations, which ECCC combines into one record.
| Distance from the town | 14 km west |
| Station altitude | 239 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −41.8°C |
| Hottest reading, 1991–2020 | 37.8°C |
| Average wind | 17.5 km/h on average, most often from the south |
| Next-nearest location | Pinawa, 76 km |
How Grassie 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 Manitoba.
Nearby towns’ climate
Places around Grassie whose figures come from another normals location. Distances here run 33–54 km: that is how far the nearest places with figures are from Grassie.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Grassie Winnipeg Richardson (Airport) | 25.8°C | −21.2°C | 519 mm |
| Brokenhead 33 km · Pinawa | 25.2°C 0.6°C cooler | −21.7°C 0.5°C colder | 571 mm |
| Cartier 52 km · Portage Southport | 25.4°C about the same | −19.1°C 2.1°C milder | 493 mm |
| St-Pierre-Jolys 53 km · Emerson | 26.0°C about the same | −20.4°C 0.8°C milder | 543 mm |
| Teulon 54 km · Gimli | 25.3°C 0.5°C cooler | −22.7°C 1.5°C colder | 517 mm |
Grassie 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 | −11.4°C | −21.2°C | −16.3°C | 18 mm | 25 cm |
| February | −8.8°C | −19.3°C | −14.1°C | 13 mm | 12 cm |
| March | −0.9°C | −11.2°C | −6.1°C | 26 mm | 19 cm |
| April | 10.0°C | −2.5°C | 3.8°C | 33 mm | 14 cm |
| May | 18.1°C | 4.2°C | 11.1°C | 70 mm | 4 cm |
| June | 23.3°C | 10.9°C | 17.1°C | 74 mm | 0 cm |
| July | 25.8°C | 13.2°C | 19.5°C | 77 mm | 0 cm |
| August | 25.4°C | 11.9°C | 18.7°C | 74 mm | 0 cm |
| September | 19.6°C | 6.9°C | 13.3°C | 53 mm | 0 cm |
| October | 10.4°C | −0.2°C | 5.1°C | 38 mm | 4 cm |
| November | 0.1°C | −8.8°C | −4.4°C | 25 mm | 21 cm |
| December | −8.2°C | −17.3°C | −12.7°C | 19 mm | 27 cm |
| Year | 8.6°C | −2.8°C | 2.9°C | 519 mm | 126 cm |
In March, anything from −37.4°C to 23.7°C
December is the least predictable month: about two years in three its average lands within 4.1°C of the normal, −12.7°C. July is the steadiest, within 1.4°C.
Where Grassie’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Winnipeg Richardson (Airport), 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- 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 Grassie’s climate
How warm does Grassie get in summer?
Summer peaks in July: a typical afternoon reaches 25.8°C.
How cold does Grassie get in winter?
A typical January night falls to −21.2°C, the year’s low point.
How much rain and snow does Grassie get?
Count on roughly 519 mm a year, heaviest in July (77 mm) and lightest in February (13 mm).
Are these figures for Grassie itself?
Nearly: Winnipeg Richardson (Airport), the location behind them, sits just beyond Grassie’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Grassie →
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).