Photo: Felspar13 · CC BY-SA 4.0Winter nights in Rosser are colder than in 95% of Canadian towns
On a normal July day the thermometer tops out near 25.8°C. Precipitation is light here, less than falls on 72% of Canadian towns. Expect the most rain and snow in July and the least in February. Ice scrapers and block heaters earn their keep on roughly 193 days a year at 0°C or below.
Measured at Winnipeg Richardson (Airport), 13 km east: ECCC’s normals for 1991–2020.
A year in Rosser at a glance
Each month’s typical high and low, in °C.
What stands out about Rosser’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Manitoba beside it.
What a year in Rosser feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 193 days, 20°C on 110
The frost season runs September to May, and January freezes nearly every night. Some 52 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
About 519 mm of rain and snow a year
Some 80 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 126 cm in a normal year
The snow season runs October to May; December brings the most, about 27 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Rosser
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
One degree below 18°C for one day makes one heating degree day; the year’s days are added together. Over a year, a home here needs more heating than 89% of Canadian towns.
Living with Rosser’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Gardens get from about 23 May to 22 September without frost, around 122 days in all.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul and Aug.
Parks & trails →Frostbite weather, a wind chill under −20, turns up on about 86 days a year.
A humidex above 30 marks about 37 days in a normal year.
Thirty years of averages say little about one bad storm; Rosser’s hazards page does.
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 | 13 km east |
| 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 | Portage Southport, 63 km |
How Rosser compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Manitoba.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Rosser’s would only repeat its figures. No closer places have figures: these lie 28–58 km from Rosser.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Rosser Winnipeg Richardson (Airport) | 25.8°C | −21.2°C | 519 mm |
| Cartier 28 km · Portage Southport | 25.4°C about the same | −19.1°C 2.1°C milder | 493 mm |
| Teulon 48 km · Gimli | 25.3°C 0.5°C cooler | −22.7°C 1.5°C colder | 517 mm |
| Brokenhead 55 km · Pinawa | 25.2°C 0.6°C cooler | −21.7°C 0.5°C colder | 571 mm |
| Morris 58 km · Emerson | 26.0°C about the same | −20.4°C 0.8°C milder | 543 mm |
Rosser 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 |
From −37.4°C to 23.7°C: March’s coldest and warmest days since 1991
The month to count on least is December: one year in three its average strays more than 4.1°C from −12.7°C. July moves least, typically by 1.4°C.
Where Rosser’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Winnipeg Richardson (Airport) from ECCC’s climate data site, the nearest location with every month of temperature.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- 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 Rosser’s climate
How warm does Rosser get in summer?
Summer peaks in July: a typical afternoon reaches 25.8°C.
How cold does Rosser get in winter?
Midwinter means January, when a typical night reaches −21.2°C.
How much rain and snow does Rosser get?
Measured as water, a year brings 519 mm: 77 mm in July, the wettest month, and 13 mm in February, the driest.
Are these figures for Rosser itself?
Yes: ECCC’s 1991–2020 normals for Winnipeg Richardson (Airport), which is in Rosser.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rosser →
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).