No extremes in Rosenberg: its weather tracks the middle of Canadian towns
A typical July afternoon reaches 26.6°C, a January night drops to −10.3°C, and 851 mm of rain and snow falls in a year. The wettest month is July; the driest is February. Summer afternoons here are warmer than in 70% of Canadian towns. The outdoor season runs from June to September, with highs of 22–27°C.
Environment and Climate Change Canada’s 1991–2020 normals at its Kitchener/Waterloo station, 12 km north-east.
A year in Rosenberg at a glance
Each month’s typical high and low, in °C.
What stands out about Rosenberg’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Rosenberg feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 156 frosts and 122 warm days a year
Frost comes from October to May; in January almost every night freezes. 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
115 cm of snow in a typical year
Snow falls from November to April, most of all in January (about 32 cm).
Snowfall by month
Centimetres
Snowfall: Toronto Pearson (Airport), 77 km away (Kitchener/Waterloo records no complete year of it).
Heating a home in Rosenberg
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. That means homes here need less heating than 69% of Canadian towns.
Living with Rosenberg’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Wait until about 8 May to plant out; frost tends to come back around 5 October, about 149 days later.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jun, Jul, Aug and Sep.
Parks & trails →Severe weather is a separate story from the averages: see Rosenberg’s hazards page.
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 | 12 km north-east |
| Station altitude | 322 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Toronto Pearson (Airport), 77 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, 30 km |
How Rosenberg compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Ontario.
Nearby towns’ climate
The nearest places on a normals location of their own: those that share Rosenberg’s would only repeat its figures. The nearest places to Rosenberg with figures are 18–32 km away.
Rosenberg 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 | −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 |
March has run from −29.4°C to 26.5°C in thirty years
Year to year, February varies most (a standard deviation of 3.1°C around −5.9°C) and June least (1.1°C).
Where Rosenberg’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Kitchener/Waterloo: the nearest of its locations with every month’s 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: a sunshine figure (ECCC published none for 1991–2020) and any lapse-rate correction for height, as the town has no elevation here.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Rosenberg’s climate
How warm does Rosenberg get in summer?
Peak warmth comes in July, at about 26.6°C by mid-afternoon.
How cold does Rosenberg get in winter?
The coldest nights come in January, averaging −10.3°C.
How much rain and snow does Rosenberg get?
The yearly total is about 851 mm. July gets 96 mm, the most of any month; February gets 46 mm, the least.
Are these figures for Rosenberg itself?
Almost: ECCC’s Kitchener/Waterloo location, which gives these figures, lies a short way outside Rosenberg.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Rosenberg →
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).