Photo: Benoit Rochon · CC BY-SA 3.0Wet weather: 1,041 mm of rain and snow a year falls on Napierville, more than on 74% of Canadian towns
In January the night’s low is typically −13.6°C. Expect the most rain and snow in October and the least in February. Its July heat outdoes that of 70% of Canadian towns. Garden chairs stay out from June to September, the months with highs of 21–27°C.
ECCC publishes no normals for Napierville itself; the figures are those of L'Acadie, 12 km north.
A year in Napierville at a glance
Each month’s typical high and low, in °C.
What stands out about Napierville’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Napierville feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 149 days, 20°C on 124
From October to April frost is routine, and in January it comes on almost every night. On about 15 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 1,041 mm a year
Some 122 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
L'Acadie publishes no full year of precipitation or snowfall, so these figures, and the snow below, come from Montréal Trudeau (Airport), 41 km away.
217 cm of snow in a typical year
Snow falls from October to April, most of all in January (about 52 cm).
Snowfall by month
Centimetres
Heating a home in Napierville
93% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Heating degree days total each day’s gap between its mean temperature and 18°C.
Living with Napierville’s climate
What the normals mean for a garden, a day outside and the depth of winter.
Plan time outside for Jun, Jul, Aug and Sep: highs of 17–27°C and nights no colder than 8°C.
Parks & trails →About 36 days a year bring a wind chill under −20, when bare skin chills fast.
The humidex tops 30 on about 50 days a year: muggy days to plan around.
Storms, floods and heat waves sit outside these normals; Napierville’s hazards page covers them.
Flood & hazards →ECCC’s normals location: L'Acadie
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for L'Acadie.
| Distance from the town | 12 km north |
| Station altitude | 44 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Precipitation from | Montréal Trudeau (Airport), 41 km |
| Coldest reading, 1991–2020 | −32.5°C |
| Hottest reading, 1991–2020 | 36.1°C |
| Average wind | 11.4 km/h on average, most often from the west |
| Next-nearest location | Montréal Trudeau (Airport), 41 km |
How Napierville compares
Against the 2,611 Canadian towns and neighbourhoods of 2,500 or more, each read from its own normals location; the dots are the other locations those towns use in Quebec.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Napierville’s own would show the same figures). Distances here run 23–25 km: that is how far the nearest places with figures are from Napierville.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Napierville L'Acadie | 26.6°C | −13.6°C | 1,041 mm |
| Venise-en-Québec 23 km · Frelighsburg | 25.6°C 1.0°C cooler | −12.9°C 0.7°C milder | 1,340 mm |
| Delson 24 km · Montréal Trudeau (Airport) | 26.7°C about the same | −13.5°C about the same | 1,041 mm |
Napierville weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −4.3°C | −13.6°C | −9.0°C | 86 mm | 52 cm |
| February | −2.9°C | −12.7°C | −7.8°C | 66 mm | 47 cm |
| March | 2.6°C | −6.7°C | −2.1°C | 77 mm | 37 cm |
| April | 11.1°C | 0.7°C | 5.9°C | 90 mm | 15 cm |
| May | 19.5°C | 7.8°C | 13.7°C | 86 mm | 0 cm |
| June | 24.2°C | 13.2°C | 18.7°C | 84 mm | 0 cm |
| July | 26.6°C | 15.5°C | 21.1°C | 91 mm | 0 cm |
| August | 25.3°C | 13.9°C | 19.6°C | 94 mm | 0 cm |
| September | 21.4°C | 9.7°C | 15.6°C | 89 mm | 0 cm |
| October | 13.6°C | 4.1°C | 8.9°C | 103 mm | 1 cm |
| November | 6.1°C | −1.7°C | 2.2°C | 84 mm | 16 cm |
| December | −0.7°C | −8.6°C | −4.7°C | 92 mm | 48 cm |
| Year | 11.9°C | 1.8°C | 6.8°C | 1,041 mm | 217 cm |
Two years in three, January’s average lands within 2.9°C of normal, against the steadier August
The thirty-year records stretch furthest in March: a low of −28.7°C in 2003 and a high of 25.4°C in 2012.
Where Napierville’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the Canadian Climate Normals, 1991–2020, at L'Acadie (the closest location with all twelve months of temperatures).
- Other locations: a location missing months of precipitation or snow is filled from the nearest that has them all, never mixed month by month.
- Comparisons: the towns and neighbourhoods of 2,500+ across Canada, each on its nearest normals location, without the city totals or the reserves.
- 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 Napierville’s climate
How warm does Napierville get in summer?
On a normal day in July the thermometer climbs to 26.6°C, the warmest of the year.
How cold does Napierville get in winter?
Deep winter means January, when nights average −13.6°C.
How much rain and snow does Napierville get?
1,041 mm a year counting snow as water. The wettest month is October (103 mm); the driest, February (66 mm).
Are these figures for Napierville itself?
No: Napierville has no normals location, so the figures come from L'Acadie, the nearest with 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Napierville →
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).