Photo: Laroutedesvins · CC BY-SA 4.0Precipitation in Dunham tops that of 94% of Canadian towns: 1,340 mm a year
In January the night’s low is typically −13.5°C. Expect the most rain and snow in July and the least in February. An umbrella or a shovel earns its place on about 156 days a year with 1 mm or more.
These are not Dunham’s own readings: ECCC keeps no normals there, so the page uses Sutton, 12 km south-east.
A year in Dunham at a glance
Each month’s typical high and low, in °C.
What stands out about Dunham’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Dunham feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
159 frost days and 111 days above 20°C a year
From October to May frost is routine, and in January it comes on almost every night. Deep cold, under −20°C, comes on about 16 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
Rain and melted snow: about 1,340 mm a year
2nd wettest of 513 towns of 2,500+ in Quebec.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 321 cm in a normal year
From October to May snow is likely; December is the peak, at about 68 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Dunham
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Measured against 18°C: each day’s shortfall in mean temperature, added over twelve months.
Living with Dunham’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
Plant out after about 15 May; the first frost of autumn usually arrives near 2 October, leaving roughly 139 days without frost.
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 →A normal year has no blizzard, flood or heat wave in it; Dunham’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Sutton
The page’s figures are ECCC’s 1991–2020 normals for Sutton, one of its 450 normals locations.
| Distance from the town | 12 km south-east |
| Station altitude | 244 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −36.5°C |
| Hottest reading, 1991–2020 | 33.5°C |
| Next-nearest location | Frelighsburg, 15 km |
How Dunham 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 Quebec.
Nearby towns’ climate
Places around Dunham whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Dunham Sutton | 25.3°C | −13.5°C | 1,340 mm |
| Cowansville 6.7 km · Sutton | 25.3°C about the same | −13.5°C about the same | 1,340 mm |
| Brigham 11 km · Granby | 25.6°C about the same | −13.4°C about the same | 1,226 mm |
| Frelighsburg 12 km · Frelighsburg | 25.6°C about the same | −12.9°C 0.6°C milder | 1,340 mm |
Dunham 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 | −3.9°C | −13.5°C | −8.9°C | 97 mm | 63 cm |
| February | −2.3°C | −12.3°C | −7.4°C | 84 mm | 62 cm |
| March | 2.8°C | −6.7°C | −2.0°C | 100 mm | 58 cm |
| April | 10.8°C | 0.4°C | 5.8°C | 111 mm | 26 cm |
| May | 18.6°C | 7.1°C | 12.8°C | 115 mm | 2 cm |
| June | 22.9°C | 11.9°C | 17.4°C | 114 mm | 0 cm |
| July | 25.3°C | 14.5°C | 19.7°C | 128 mm | 0 cm |
| August | 24.3°C | 13.7°C | 19.0°C | 123 mm | 0 cm |
| September | 20.3°C | 9.6°C | 14.9°C | 119 mm | 0 cm |
| October | 13.1°C | 3.9°C | 8.5°C | 127 mm | 9 cm |
| November | 5.9°C | −2.1°C | 2.0°C | 112 mm | 34 cm |
| December | −0.7°C | −8.7°C | −4.8°C | 111 mm | 68 cm |
| Year | 11.4°C | 1.5°C | 6.4°C | 1,340 mm | 321 cm |
From −36.5°C to 19.0°C: February’s coldest and warmest days since 1991
From one year to the next, January’s average typically shifts by 3.2°C around its normal of −8.9°C, the widest of any month, while August’s shifts by 1.0°C.
Where Dunham’s numbers come from
Averages over 30 years, not a forecast.
- Normals: 1991–2020 normals for Sutton from ECCC’s climate data site, the nearest location with every month of temperature.
- Comparisons: every Canadian town and neighbourhood of 2,500 or more, each read from its own nearest location; city totals and reserves are left out.
- Not on this page: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Dunham’s climate
How warm does Dunham get in summer?
Expect highs near 25.3°C in July, the hottest month on average.
How cold does Dunham get in winter?
The year’s coldest nights belong to January, at about −13.5°C.
How much rain and snow does Dunham get?
Rain and snow add up to about 1,340 mm of water a year; July brings the most (128 mm), February the least (84 mm).
How long does snow stay on the ground?
The ground is white, with 1 cm or more, on some 123 days a year.
Are these figures for Dunham itself?
They are the closest available: the normals for Sutton, since Dunham has none.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Dunham →
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).