Summer afternoons in Westboro are warmer than in 78% of Canadian towns
The coldest hours of a January night bottom out at −14.0°C on average. It is a wet place: more rain and snow fall here than on 60% of Canadian towns. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 41°C apart. Expect about 147 frosty starts a year, days when the air falls to freezing.
1991–2020 normals from ECCC’s Ottawa (City) location, 2.7 km south-east.
A year in Westboro at a glance
Each month’s typical high and low, in °C.
What stands out about Westboro’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Westboro feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 147 frosts and 121 warm days a year
The frost season runs October to April, and January freezes nearly every night. Deep cold, under −20°C, comes on about 15 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
938 mm of precipitation in a typical year
June brings the most rain and snow; February, the least. On about 120 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
185 cm of snow in a typical year
Snow falls from October to April, most of all in January (about 45 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Westboro
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A heating degree day is one degree of shortfall below 18°C for one day, summed over the year.
Living with Westboro’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Seedlings can go out once the average last frost, around 30 April, has passed; autumn’s first, near 6 October, ends a season of about 158 days.
Afternoons of 17–27°C and nights of at least 8°C arrive in May, Jun, Jul, Aug and Sep.
Parks & trails →Winter brings about 39 days with a wind chill below −20.
On some 50 days a year the humidex climbs past 30.
A normal year has no blizzard, flood or heat wave in it; Westboro’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Ottawa (City)
Ottawa (City) is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 2.7 km south-east |
| Station altitude | 79 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | Yes |
| Coldest reading, 1991–2020 | −32.2°C |
| Hottest reading, 1991–2020 | 37.3°C |
| Average wind | 11.5 km/h on average, most often from the west |
| Next-nearest location | Ottawa (Airport), 10 km |
How Westboro 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 Westboro’s own would show the same figures). Distances here run 18–26 km: that is how far the nearest places with figures are from Westboro.
Westboro weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −5.2°C | −14.0°C | −9.6°C | 65 mm | 45 cm |
| February | −3.3°C | −12.9°C | −8.1°C | 52 mm | 41 cm |
| March | 2.5°C | −6.9°C | −2.2°C | 62 mm | 31 cm |
| April | 11.2°C | 1.1°C | 6.2°C | 81 mm | 8 cm |
| May | 19.4°C | 8.0°C | 13.8°C | 80 mm | 0 cm |
| June | 24.2°C | 13.3°C | 18.8°C | 95 mm | 0 cm |
| July | 26.7°C | 15.8°C | 21.3°C | 92 mm | 0 cm |
| August | 25.6°C | 14.6°C | 20.1°C | 87 mm | 0 cm |
| September | 21.1°C | 10.1°C | 15.6°C | 87 mm | 0 cm |
| October | 13.3°C | 4.1°C | 8.8°C | 90 mm | 2 cm |
| November | 5.8°C | −1.8°C | 2.0°C | 72 mm | 16 cm |
| December | −1.5°C | −8.7°C | −5.1°C | 74 mm | 43 cm |
| Year | 11.7°C | 1.9°C | 6.8°C | 938 mm | 185 cm |
Two years in three, January’s average lands within 3.1°C of normal, against the steadier June
March has the widest record range, −28.5°C in 2003 to 26.5°C in 2012; the tick on each bar is the month’s normal.
Where Westboro’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at Ottawa (City) (the closest location with all twelve months of temperatures).
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- 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 Westboro’s climate
How warm does Westboro get in summer?
Summer peaks in July: a typical afternoon reaches 26.7°C.
How cold does Westboro get in winter?
A typical January night falls to −14.0°C, the year’s low point.
How much rain and snow does Westboro get?
About 938 mm a year, rain and melted snow together. June is the wettest month (95 mm) and February the driest (52 mm).
How long does snow stay on the ground?
Roughly 115 days a year start with snow cover of 1 cm or more.
Are these figures for Westboro itself?
They are the normals for Ottawa (City), measured just outside Westboro itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Westboro →
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).