Photo: Bluejaywpg · Public domainNights turn raw in Stony Mountain each January, colder than in 95% of Canadian towns
July afternoons average 25.8°C. By precipitation alone, it ranks drier than 72% of Canadian towns. The year is lopsided: July gets about 5.8 times what February does. Have the furnace checked before October to April, the months that average under 10°C.
No ECCC station in Stony Mountain has 1991–2020 normals; the page reads Winnipeg Richardson (Airport), 32 km south, instead.
A year in Stony Mountain at a glance
Each month’s typical high and low, in °C.
What stands out about Stony Mountain’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Manitoba beside it.
What a year in Stony Mountain 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
Frost comes from September to May; in January almost every night freezes. Deep cold, under −20°C, comes on about 52 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 519 mm 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
Snow falls from October to May, most of all in December (about 27 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Stony Mountain
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
The total grows by a degree for every degree a day’s mean sits under 18°C. Over a year, a home here needs more heating than 89% of Canadian towns.
Living with Stony Mountain’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
A normal year gives the garden about 122 frost-free days, roughly 23 May to 22 September.
Warm afternoons without cold nights, 17–27°C and 8°C or more, mark Jun, Jul and Aug.
Parks & trails →Roughly 86 days a year feel colder than −20 in the wind.
About 37 days a year feel above 30 on the humidex.
Thirty-year normals hide the storms and the extremes: the hazards page has Stony Mountain’s risks.
Flood & hazards →ECCC’s normals location: Winnipeg Richardson (Airport)
Winnipeg Richardson (Airport) is a composite: ECCC joins 4 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 32 km south |
| 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 | Gimli, 50 km |
How Stony Mountain 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 Stony Mountain whose figures come from another normals location. Stony Mountain has few close neighbours with figures, so the list reaches 20–43 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Stony Mountain Winnipeg Richardson (Airport) | 25.8°C | −21.2°C | 519 mm |
| Teulon 20 km · Gimli | 25.3°C 0.5°C cooler | −22.7°C 1.5°C colder | 517 mm |
| Brokenhead 43 km · Pinawa | 25.2°C 0.6°C cooler | −21.7°C 0.5°C colder | 571 mm |
Stony Mountain 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 |
March has run from −37.4°C to 23.7°C in thirty years
Year to year, December varies most (a standard deviation of 4.1°C around −12.7°C) and July least (1.4°C).
Where Stony Mountain’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 Canadian Climate Normals at Winnipeg Richardson (Airport), the closest ECCC location with twelve months of temperature normals.
- Comparisons: every place of 2,500+ in Canada but the city hubs and the reserves, each on its nearest ECCC location.
- Not on this page: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Stony Mountain’s climate
How warm does Stony Mountain get in summer?
Afternoons average 25.8°C in July, the warmest time of year.
How cold does Stony Mountain get in winter?
At its coldest, in January, the normal low is −21.2°C.
How much rain and snow does Stony Mountain get?
Around 519 mm a year in all, from 77 mm in July down to 13 mm in February.
Are these figures for Stony Mountain itself?
They are the closest available: the normals for Winnipeg Richardson (Airport), since Stony Mountain has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Stony Mountain →
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).