Neither notably warm, cold, wet nor dry, Rosemount sits near the middle of Canadian towns
A typical January night drops to −10.3°C and a July afternoon reaches 26.6°C; 851 mm of rain and snow falls in a year. Its July heat outdoes that of 70% of Canadian towns. Rain or snow is most frequent in July and least in February. Ice scrapers and block heaters earn their keep on roughly 156 days a year at 0°C or below.
Read at Kitchener/Waterloo, 6.4 km east: ECCC’s normals for 1991–2020.
A year in Rosemount at a glance
Each month’s typical high and low, in °C.
What stands out about Rosemount’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Rosemount feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 156 days, 20°C on 122
The frost season runs October to May, and January freezes nearly every night. Some 7 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 851 mm of rain and snow a year
On about 115 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Snowfall: about 115 cm in a normal year
From November to April snow is likely; January is the peak, at about 32 cm.
Snowfall by month
Centimetres
Snowfall: Toronto Pearson (Airport), 71 km away (Kitchener/Waterloo records no complete year of it).
Heating a home in Rosemount
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
ECCC sums, over the year, how many degrees each day’s average falls short of 18°C. Homes here need less heating than 69% of Canadian towns.
Living with Rosemount’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Frost usually lets go around 8 May and returns near 5 October, about 149 days apart.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →A typical year is calm by definition; Rosemount’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Kitchener/Waterloo
ECCC builds the Kitchener/Waterloo normals from 3 stations’ records over 1991–2020, joined where one replaced another.
| Distance from the town | 6.4 km east |
| Station altitude | 322 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 71 km |
| Coldest reading, 1991–2020 | −34.1°C |
| Hottest reading, 1991–2020 | 36.5°C |
| Average wind | 13.8 km/h on average, most often from the west |
| Next-nearest location | Elora, 21 km |
How Rosemount 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 Ontario.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Rosemount’s would only repeat its figures. The one place listed is 11 km from Rosemount, the nearest with figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Rosemount Kitchener/Waterloo | 26.6°C | −10.3°C | 851 mm |
| Elmira 11 km · Elora | 25.4°C 1.2°C cooler | −10.7°C about the same | 851 mm |
Rosemount weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −2.3°C | −10.3°C | −6.3°C | 66 mm | 32 cm |
| February | −1.4°C | −10.3°C | −5.9°C | 46 mm | 28 cm |
| March | 4.1°C | −5.6°C | −0.8°C | 57 mm | 17 cm |
| April | 11.6°C | 0.1°C | 5.9°C | 81 mm | 5 cm |
| May | 19.0°C | 6.2°C | 12.6°C | 80 mm | under 1 cm |
| June | 24.1°C | 11.5°C | 17.8°C | 81 mm | 0 cm |
| July | 26.6°C | 13.7°C | 20.2°C | 96 mm | 0 cm |
| August | 25.5°C | 12.7°C | 19.1°C | 67 mm | 0 cm |
| September | 21.6°C | 8.7°C | 15.2°C | 75 mm | 0 cm |
| October | 14.1°C | 3.4°C | 8.8°C | 71 mm | under 1 cm |
| November | 6.8°C | −1.6°C | 2.6°C | 75 mm | 9 cm |
| December | 0.7°C | −6.3°C | −2.8°C | 55 mm | 24 cm |
| Year | 12.5°C | 1.9°C | 7.2°C | 851 mm | 115 cm |
Two years in three, February’s average lands within 3.1°C of normal, against the steadier June
Bars run from each month’s record low to its record high since 1991. March spans the most, from −29.4°C (2003) to 26.5°C (2012).
Where Rosemount’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Kitchener/Waterloo (the closest location with all twelve months of temperatures).
- Other locations: ECCC blanks a month that fails its completeness rule, so the precipitation or snowfall here comes from the next location with all twelve months.
- 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: 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 Rosemount’s climate
How warm does Rosemount get in summer?
The warmest month is July, when afternoons average 26.6°C.
How cold does Rosemount get in winter?
In January, the coldest month, the typical low is −10.3°C.
How much rain and snow does Rosemount get?
July is the wettest month at 96 mm and February the driest at 46 mm, for 851 mm over the year.
Are these figures for Rosemount itself?
They are the normals for Kitchener/Waterloo, measured just outside Rosemount itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rosemount →
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).