Photo: P199 · CC BY-SA 3.0Alnwick/Haldimand gets fewer frosts than 85% of Canadian towns
July afternoons average 23.6°C. The gap between a January night and a July afternoon is 32°C. Summers stay cool: July afternoons here are cooler than in 72% of Canadian towns. Wet days, with 1 mm of rain or snow or more, come about 114 times a year.
ECCC publishes no normals for Alnwick/Haldimand itself; the figures are those of Cobourg, 16 km south-west.
A year in Alnwick/Haldimand at a glance
Each month’s typical high and low, in °C.
What stands out about Alnwick/Haldimand’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Ontario beside it.
What a year in Alnwick/Haldimand feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 126 frosts a year
The frost season runs October to April, peaking in January at about 27 nights.
Frost days by month
Average days at 0°C or below
About 840 mm of rain and snow a year
The most falls in June, the least in February.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Cobourg publishes no full year of precipitation or snowfall, so these figures, and the snow below, come from Peterborough, 30 km away.
158 cm of snow in a typical year
Expect snow from October to April, with about 45 cm in January, the snowiest month.
Snowfall by month
Centimetres
Living with Alnwick/Haldimand’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
The comfortable months for a day outside, highs of 17–27°C and nights of 8°C or more: Jun, Jul, Aug and Sep.
Parks & trails →A wind chill below −20 is part of about 18 days a year here.
The humidex tops 30 on about 33 days a year: muggy days to plan around.
A normal year has no blizzard, flood or heat wave in it; Alnwick/Haldimand’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Cobourg
Cobourg is one of the 450 places where ECCC publishes 1991–2020 normals.
| Distance from the town | 16 km south-west |
| Station altitude | 78 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Peterborough, 30 km |
| Coldest reading, 1991–2020 | −27.4°C |
| Hottest reading, 1991–2020 | 34.0°C |
| Average wind | 11.7 km/h on average, most often from the west |
| Next-nearest location | Peterborough, 30 km |
How Alnwick/Haldimand 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
Places around Alnwick/Haldimand whose figures come from another normals location. Alnwick/Haldimand has few close neighbours with figures, so the list reaches 22–33 km out.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Alnwick/Haldimand Cobourg | 23.6°C | −8.7°C | 840 mm |
| Otonabee-South Monaghan 22 km · Peterborough | 26.6°C 3.0°C warmer | −12.8°C 4.1°C colder | 840 mm |
| Brighton 27 km · Trenton | 26.5°C 2.9°C warmer | −11.2°C 2.5°C colder | 941 mm |
Alnwick/Haldimand weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −1.1°C | −8.7°C | −4.9°C | 67 mm | 45 cm |
| February | −0.4°C | −8.1°C | −4.3°C | 42 mm | 27 cm |
| March | 3.4°C | −3.9°C | −0.3°C | 54 mm | 28 cm |
| April | 9.6°C | 2.0°C | 5.8°C | 73 mm | 7 cm |
| May | 15.4°C | 7.4°C | 11.4°C | 79 mm | 0 cm |
| June | 20.4°C | 12.4°C | 16.4°C | 88 mm | 0 cm |
| July | 23.6°C | 15.9°C | 19.8°C | 69 mm | 0 cm |
| August | 23.6°C | 15.8°C | 19.7°C | 78 mm | 0 cm |
| September | 20.4°C | 12.2°C | 16.3°C | 76 mm | 0 cm |
| October | 13.3°C | 6.0°C | 9.6°C | 75 mm | 1 cm |
| November | 7.2°C | 0.3°C | 3.8°C | 76 mm | 17 cm |
| December | 1.8°C | −4.8°C | −1.5°C | 64 mm | 33 cm |
| Year | 11.4°C | 3.9°C | 7.7°C | 840 mm | 158 cm |
A January here can run warm or cold, its average moving by about 2.8°C; the steadiest month is June
Over 1991–2020, March saw both −25.2°C (2003) and 18.8°C (1998), the widest span of any month.
Where Alnwick/Haldimand’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Cobourg, the nearest location with a full year of temperatures.
- Other locations: where a location publishes no full year of precipitation or snowfall, the nearest one that does supplies it, named beside those figures.
- 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: sunshine, absent from every 1991–2020 location, and an altitude correction, for want of the town’s own elevation.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Alnwick/Haldimand’s climate
How warm does Alnwick/Haldimand get in summer?
Summer peaks in July: a typical afternoon reaches 23.6°C.
How cold does Alnwick/Haldimand get in winter?
Overnight lows average −8.7°C in January, the coldest month.
How much rain and snow does Alnwick/Haldimand get?
840 mm a year counting snow as water. The wettest month is June (88 mm); the driest, February (42 mm).
Are these figures for Alnwick/Haldimand itself?
No, the station behind them is Cobourg, beyond Alnwick/Haldimand’s boundary.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Alnwick/Haldimand →
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).