Precipitation in Portneuf tops that of 84% of Canadian towns: 1,138 mm a year
Expect July afternoons of about 25.5°C. July is the wettest month, February the driest. By January nights alone, it runs colder than 81% of Canadian towns. The heating season runs October to April: each of those months averages under 10°C.
No ECCC station in Portneuf has 1991–2020 normals; the page reads Fortierville, 29 km south-west, instead.
A year in Portneuf at a glance
Each month’s typical high and low, in °C.
What stands out about Portneuf’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Quebec beside it.
What a year in Portneuf feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
Frost on 175 days, 20°C on 107
The frost season runs September to May, and January freezes nearly every night. Some 29 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
About 1,138 mm of rain and snow a year
Some 141 days a year see 1 mm of rain or snow or more.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
253 cm of snow in a typical year
Snow falls from October to April, most of all in December (about 59 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Portneuf
91% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
A day averaging 10 degrees under 18°C adds 10 to the total; warm days add nothing. Over a year, a home here needs more heating than 61% of Canadian towns.
Living with Portneuf’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 →The normals describe a typical year, not its worst days; the hazards page covers Portneuf’s.
Flood & hazards →ECCC’s normals location: Fortierville
Every temperature, frost, snow and degree-day figure on this page is the 1991–2020 normal ECCC publishes for Fortierville.
| Distance from the town | 29 km south-west |
| Station altitude | 53 m |
| Completeness | at least 20 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −41.0°C |
| Hottest reading, 1991–2020 | 35.9°C |
| Next-nearest location | Québec Jean Lesage (Airport), 40 km |
How Portneuf 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
Places around Portneuf whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Portneuf Fortierville | 25.5°C | −16.9°C | 1,138 mm |
| Saint-Basile 7.2 km · Québec Jean Lesage (Airport) | 25.0°C 0.5°C cooler | −16.7°C about the same | 1,173 mm |
| Cap-Santé 7.5 km · Fortierville | 25.5°C about the same | −16.9°C about the same | 1,138 mm |
Portneuf weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | −6.9°C | −16.9°C | −12.0°C | 81 mm | 56 cm |
| February | −4.9°C | −15.9°C | −10.5°C | 69 mm | 55 cm |
| March | 1.2°C | −9.0°C | −4.0°C | 79 mm | 47 cm |
| April | 9.5°C | −1.0°C | 4.4°C | 94 mm | 15 cm |
| May | 18.4°C | 5.8°C | 12.1°C | 92 mm | 1 cm |
| June | 23.3°C | 11.1°C | 17.2°C | 108 mm | 0 cm |
| July | 25.5°C | 14.0°C | 19.6°C | 133 mm | 0 cm |
| August | 24.5°C | 12.9°C | 18.6°C | 103 mm | 0 cm |
| September | 20.0°C | 8.3°C | 14.2°C | 95 mm | 0 cm |
| October | 12.1°C | 2.5°C | 7.4°C | 105 mm | 3 cm |
| November | 4.6°C | −3.2°C | 0.9°C | 82 mm | 19 cm |
| December | −2.9°C | −10.9°C | −6.9°C | 100 mm | 59 cm |
| Year | 10.4°C | −0.2°C | 5.1°C | 1,138 mm | 253 cm |
The most changeable month: January, give or take 3.2°C; the steadiest, June
March has the widest record range, −32.0°C in 1995 to 23.5°C in 2012; the tick on each bar is the month’s normal.
Where Portneuf’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Fortierville, 1991–2020, chosen as the nearest location with a full temperature record.
- 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 Portneuf’s climate
How warm does Portneuf get in summer?
Summer peaks in July: a typical afternoon reaches 25.5°C.
How cold does Portneuf get in winter?
A typical January night falls to −16.9°C, the year’s low point.
How much rain and snow does Portneuf get?
July is the wettest month at 133 mm and February the driest at 69 mm, for 1,138 mm over the year.
How long does snow stay on the ground?
Snow cover of 1 cm or more lasts about 134 days in a typical year.
Are these figures for Portneuf itself?
Not quite: they come from Fortierville, the closest ECCC normals location to Portneuf.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Portneuf →
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).