Photo: Drozwik Drones · CC BY 3.0Bowmanville gets fewer frosts than 84% of Canadian towns
Midsummer highs settle at about 25.7°C. From frozen January to warm July, readings climb 35°C. An umbrella or a shovel earns its place on about 115 days a year with 1 mm or more.
Borrowed figures: Bowmanville has no normals station, so these come from Oshawa, 15 km west.
A year in Bowmanville at a glance
Each month’s typical high and low, in °C.
What stands out about Bowmanville’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Bowmanville feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
130 frost days and 107 days above 20°C a year
The frost season runs October to April, and January freezes nearly every night. About 4 days a year top 30°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 906 mm a year
June brings the most rain and snow; February, the least.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
102 cm of snow in a typical year
From November to April snow is likely; January is the peak, at about 34 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Bowmanville
92% 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. By this count, homes here need less heating than 81% of Canadian towns.
Living with Bowmanville’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
On average the last spring frost comes around 30 April and the first autumn frost around 15 October: about 167 frost-free days between.
The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →A typical year is calm by definition; Bowmanville’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Oshawa
Behind the 1991–2020 normals for Oshawa are 2 stations, which ECCC combines into one record.
| Distance from the town | 15 km west |
| Station altitude | 140 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −28.0°C |
| Hottest reading, 1991–2020 | 37.1°C |
| Next-nearest location | Cobourg, 43 km |
How Bowmanville 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
Nearby places read from a different ECCC location (places on Bowmanville’s own would show the same figures). Distances here run 32–42 km: that is how far the nearest places with figures are from Bowmanville.
Bowmanville 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 | −1.1°C | −8.9°C | −5.0°C | 75 mm | 34 cm |
| February | −0.2°C | −8.3°C | −4.2°C | 54 mm | 26 cm |
| March | 4.5°C | −3.9°C | 0.3°C | 54 mm | 11 cm |
| April | 10.6°C | 1.7°C | 6.2°C | 87 mm | 2 cm |
| May | 17.5°C | 7.6°C | 12.6°C | 85 mm | 0 cm |
| June | 22.7°C | 12.9°C | 17.8°C | 94 mm | 0 cm |
| July | 25.7°C | 15.8°C | 20.9°C | 86 mm | 0 cm |
| August | 24.8°C | 15.4°C | 20.1°C | 74 mm | 0 cm |
| September | 20.9°C | 11.4°C | 16.2°C | 86 mm | 0 cm |
| October | 13.6°C | 5.3°C | 9.5°C | 72 mm | under 1 cm |
| November | 7.5°C | 0.3°C | 3.9°C | 73 mm | 5 cm |
| December | 2.2°C | −4.6°C | −1.2°C | 68 mm | 25 cm |
| Year | 12.4°C | 3.7°C | 8.1°C | 906 mm | 102 cm |
The most changeable month: February, give or take 3.0°C; the steadiest, October
March has the widest record range, −25.2°C in 2015 to 23.3°C in 2012; the tick on each bar is the month’s normal.
Where Bowmanville’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the closest ECCC location with twelve months of temperature normals, Oshawa, 1991–2020.
- 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 Bowmanville’s climate
How warm does Bowmanville get in summer?
A normal July afternoon tops out at about 25.7°C, the year’s high point.
How cold does Bowmanville get in winter?
Winter bottoms out in January, with lows near −8.9°C.
How much rain and snow does Bowmanville get?
About 906 mm a year, rain and melted snow together. June is the wettest month (94 mm) and February the driest (54 mm).
How long does snow stay on the ground?
Expect snow on the ground, at least 1 cm, for about 55 days a year.
Are these figures for Bowmanville itself?
Not quite: they come from Oshawa, the closest ECCC normals location to Bowmanville.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Bowmanville →
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).