Roslyn has colder winter nights than 95% of Canadian towns
Midsummer highs settle at about 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. Comfortable outdoor weather lasts from June to August, with highs of 23–26°C.
1991–2020 normals from ECCC’s Winnipeg Richardson (Airport) location, 7.3 km north-west.
A year in Roslyn at a glance
Each month’s typical high and low, in °C.
What stands out about Roslyn’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Manitoba beside it.
What a year in Roslyn feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
193 frost days and 110 days above 20°C a year
Frost comes from September to May; in January almost every night freezes. 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
About 80 days a year bring 1 mm or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 126 cm in a normal year
From October to May snow is likely; December is the peak, at about 27 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Roslyn
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Heating degree days total each day’s gap between its mean temperature and 18°C. In heating terms, homes need more heating than 89% of Canadian towns.
Living with Roslyn’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Plant out after about 23 May; the first frost of autumn usually arrives near 22 September, leaving roughly 122 days without frost.
For long days outdoors, Jun, Jul and Aug bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →Count on some 86 days a year when the wind makes it feel below −20.
The humidex tops 30 on about 37 days a year: muggy days to plan around.
Ice storms, floods and heat waves are risks, not averages: they are on Roslyn’s hazards page.
Flood & hazards →ECCC’s normals location: Winnipeg Richardson (Airport)
ECCC builds the Winnipeg Richardson (Airport) normals from 4 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 7.3 km north-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 | Portage Southport, 80 km |
How Roslyn 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
Nearby places read from a different ECCC location (places on Roslyn’s own would show the same figures). Distances here run 42–50 km: that is how far the nearest places with figures are from Roslyn.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Roslyn Winnipeg Richardson (Airport) | 25.8°C | −21.2°C | 519 mm |
| Brokenhead 42 km · Pinawa | 25.2°C 0.6°C cooler | −21.7°C 0.5°C colder | 571 mm |
| Cartier 45 km · Portage Southport | 25.4°C about the same | −19.1°C 2.1°C milder | 493 mm |
Roslyn weather by month
Average daily high and low, mean temperature, rain and snow (as water) and snowfall by month, 1991–2020.
| 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 |
A December here can run warm or cold, its average moving by about 4.1°C; the steadiest month is July
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −37.4°C in 2003 to 23.7°C in 2012.
Where Roslyn’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Winnipeg Richardson (Airport), the nearest location with a full year of temperatures.
- 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 Roslyn’s climate
How warm does Roslyn get in summer?
A normal July afternoon tops out at about 25.8°C, the year’s high point.
How cold does Roslyn get in winter?
Expect nights around −21.2°C in January; no month is colder.
How much rain and snow does Roslyn get?
Count on roughly 519 mm a year, heaviest in July (77 mm) and lightest in February (13 mm).
Are these figures for Roslyn itself?
Almost: ECCC’s Winnipeg Richardson (Airport) location, which gives these figures, lies a short way outside Roslyn.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Roslyn →
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).