Photo: DomLemLali · CC BY-SA 4.0Farnham is wetter than 91% of Canadian towns: 1,226 mm of rain and snow a year
Midwinter brings lows of about −13.4°C. Some 39°C separates winter nights from summer afternoons. Wet days, with 1 mm of rain or snow or more, come about 145 times a year.
Borrowed figures: Farnham has no normals station, so these come from Granby, 23 km north-east.
A year in Farnham at a glance
Each month’s typical high and low, in °C.
What stands out about Farnham’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Farnham feels like
Each season’s and each month’s usual high and low, 1991–2020.
Frost on 154 days, 20°C on 111
The frost season runs October to May, and January freezes nearly every night. On about 14 nights a year the air falls below −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 1,226 mm a year
July is the wettest month and February the driest.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
262 cm of snow in a typical year
Snow falls from October to April, most of all in January (about 59 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Farnham
92% 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.
Living with Farnham’s climate
Gardening, time outside, winter cold and summer heat, from the 1991–2020 normals.
About 154 days a year pass without frost, from an average last frost of 6 May to a first of 8 October.
Highs of 17–27°C with nights of 8°C or more come in May, Jun, Jul, Aug and Sep.
Parks & trails →A normal year has no blizzard, flood or heat wave in it; Farnham’s hazards page looks at those.
Flood & hazards →ECCC’s normals location: Granby
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Granby.
| Distance from the town | 23 km north-east |
| Station altitude | 175 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −34.0°C |
| Hottest reading, 1991–2020 | 35.0°C |
| Next-nearest location | Frelighsburg, 29 km |
How Farnham compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Quebec.
Nearby towns’ climate
Places around Farnham whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Farnham Granby | 25.6°C | −13.4°C | 1,226 mm |
| Sainte-Sabine 5.3 km · Frelighsburg | 25.6°C about the same | −12.9°C 0.5°C milder | 1,226 mm |
| Sainte-Brigide-d'Iberville 8.5 km · L'Acadie | 26.6°C 1.0°C warmer | −13.6°C about the same | 1,226 mm |
| Ange-Gardien 9.1 km · Granby | 25.6°C about the same | −13.4°C about the same | 1,226 mm |
Farnham 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 | −4.6°C | −13.4°C | −9.1°C | 95 mm | 59 cm |
| February | −3.2°C | −11.9°C | −7.4°C | 74 mm | 58 cm |
| March | 2.2°C | −6.4°C | −2.2°C | 88 mm | 48 cm |
| April | 10.5°C | 0.9°C | 5.9°C | 101 mm | 17 cm |
| May | 18.7°C | 8.0°C | 13.1°C | 100 mm | 1 cm |
| June | 23.3°C | 13.0°C | 18.3°C | 121 mm | 0 cm |
| July | 25.6°C | 15.7°C | 20.4°C | 122 mm | 0 cm |
| August | 24.6°C | 14.8°C | 19.5°C | 113 mm | 0 cm |
| September | 20.3°C | 10.6°C | 15.4°C | 113 mm | 0 cm |
| October | 12.8°C | 4.6°C | 8.6°C | 109 mm | 4 cm |
| November | 5.8°C | −1.5°C | 2.2°C | 92 mm | 22 cm |
| December | −1.0°C | −8.4°C | −4.9°C | 98 mm | 54 cm |
| Year | 11.3°C | 2.2°C | 6.6°C | 1,226 mm | 262 cm |
In March, anything from −27.5°C to 25.0°C
Bars run from each month’s record low to its record high over 1991–2020; January is the month whose average wanders most from year to year (±3.4°C around −9.1°C), August the one that wanders least (±1.0°C).
Where Farnham’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Granby, 1991–2020, chosen as the nearest location with a full temperature record.
- Comparisons: Canada’s towns and neighbourhoods of 2,500+ (no city totals, no reserves), each through its own nearest location.
- 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 Farnham’s climate
How warm does Farnham get in summer?
Expect highs near 25.6°C in July, the hottest month on average.
How cold does Farnham get in winter?
The coldest nights come in January, averaging −13.4°C.
How much rain and snow does Farnham get?
About 1,226 mm a year, rain and melted snow together. July is the wettest month (122 mm) and February the driest (74 mm).
How long does snow stay on the ground?
About 113 days a year count as snow-covered, with 1 cm or more.
Are these figures for Farnham itself?
Not exactly. Farnham lacks a normals station, so Granby supplies the figures.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Farnham →
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).