Photo: R Orville Lyttle · CC BY-SA 2.0Frosty mornings in Prescott are scarcer than in 72% of Canadian towns
Expect July afternoons of about 26.1°C. Its yearly rain and snow top those of 69% of Canadian towns. Seasons differ by 37°C, from the coldest nights to the warmest afternoons. The furnace earns its keep from October to April, the months that average under 10°C.
No ECCC station in Prescott has 1991–2020 normals; the page reads Brockville, 20 km south-west, instead.
A year in Prescott at a glance
Each month’s typical high and low, in °C.
What stands out about Prescott’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Prescott feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
About 140 frosts and 118 warm days a year
Frost comes from October to April; in January almost every night freezes. Some 8 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
Rain and melted snow: about 1,017 mm a year
July brings the most rain and snow; February, the least. On about 129 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 180 cm of snow a year
Expect snow from October to April, with about 50 cm in January, the snowiest month.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Prescott
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Each day the mean sits under 18°C adds its shortfall; a year’s total is its heating degree days. In heating terms, homes need less heating than 70% of Canadian towns.
Living with Prescott’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Wait until about 27 April to plant out; frost tends to come back around 14 October, about 169 days later.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: May, Jun, Jul, Aug and Sep.
Parks & trails →A normal year has no blizzard, flood or heat wave in it; Prescott’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Brockville
Brockville is a composite: ECCC joins 2 stations’ readings to make its 1991–2020 normals.
| Distance from the town | 20 km south-west |
| Station altitude | 120 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | Yes |
| Coldest reading, 1991–2020 | −31.5°C |
| Hottest reading, 1991–2020 | 35.0°C |
| Next-nearest location | Kemptville, 33 km |
How Prescott 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
Places around Prescott whose figures come from another normals location. The one place listed is 14 km from Prescott, the nearest with figures.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Prescott Brockville | 26.1°C | −11.3°C | 1,017 mm |
| Cardinal 14 km · Kemptville | 26.8°C 0.7°C warmer | −14.0°C 2.7°C colder | 925 mm |
Prescott 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 | −3.1°C | −11.3°C | −7.2°C | 84 mm | 50 cm |
| February | −1.7°C | −10.3°C | −6.0°C | 64 mm | 41 cm |
| March | 3.7°C | −5.0°C | −0.7°C | 68 mm | 29 cm |
| April | 11.3°C | 1.8°C | 6.6°C | 89 mm | 8 cm |
| May | 18.8°C | 8.3°C | 13.5°C | 80 mm | under 1 cm |
| June | 23.4°C | 13.5°C | 18.5°C | 96 mm | 0 cm |
| July | 26.1°C | 16.5°C | 21.3°C | 99 mm | 0 cm |
| August | 25.4°C | 15.7°C | 20.6°C | 82 mm | 0 cm |
| September | 21.2°C | 11.7°C | 16.5°C | 96 mm | 0 cm |
| October | 13.8°C | 5.8°C | 9.7°C | 94 mm | 1 cm |
| November | 7.0°C | −0.2°C | 3.5°C | 81 mm | 11 cm |
| December | 0.4°C | −6.5°C | −3.0°C | 85 mm | 41 cm |
| Year | 12.2°C | 3.3°C | 7.8°C | 1,017 mm | 180 cm |
January strays furthest from its normal year to year, by 3.1°C; June the least
Each bar spans a month’s coldest and warmest readings over thirty years; March’s run from −26.0°C in 2003 to 26.0°C in 1998.
Where Prescott’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Brockville, 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: all Canadian places of 2,500 or more except city totals and reserves, each read the same way.
- Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Prescott’s climate
How warm does Prescott get in summer?
Expect highs near 26.1°C in July, the hottest month on average.
How cold does Prescott get in winter?
The coldest nights come in January, averaging −11.3°C.
How much rain and snow does Prescott get?
July is the wettest month at 99 mm and February the driest at 64 mm, for 1,017 mm over the year.
Are these figures for Prescott itself?
The figures are ECCC’s for Brockville; Prescott has no normals station.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Prescott →
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).