Few Canadian towns get more rain and snow than Port Mann: 1,649 mm a year
On a normal July day the thermometer tops out near 25.0°C. In January, nights here are milder than in 95% of Canadian towns. The year is lopsided: January gets about 7.0 times what August does. About 148 days a year bring 1 mm of precipitation or more.
The nearest ECCC normals location to Port Mann is Pitt Meadows, 10 km east, and every figure on this page is its.
A year in Port Mann at a glance
Each month’s typical high and low, in °C.
What stands out about Port Mann’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in British Columbia beside it.
What a year in Port Mann feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 60 frosts and 107 warm days a year
Frost comes from October to April, most of all in December (about 15 nights). About 11 days a year top 30°C.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,649 mm of rain and snow a year
10th wettest of 255 towns of 2,500+ in British Columbia.
Rain and snow by month
Millimetres
Snowfall: about 37 cm in a normal year
Expect snow from November to March, with about 14 cm in December, the snowiest month.
Snowfall by month
Centimetres
Snowfall: Vancouver International (Airport), 25 km away (Pitt Meadows records no complete year of it).
Heating a home in Port Mann
88% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Degree days add up how far each day’s mean temperature falls below 18°C over a year. Homes here need less heating than 96% of Canadian towns.
Living with Port Mann’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Tender plants are usually safe from around 11 April until frost returns near 30 October: about 201 days.
Highs of 17–27°C with nights of 8°C or more come in Jun, Jul, Aug and Sep.
Parks & trails →Plan shade and water for about 26 days a year above 30 on the humidex.
A typical year is calm by definition; Port Mann’s hazards page covers the exceptions.
Flood & hazards →ECCC’s normals location: Pitt Meadows
The page’s figures are ECCC’s 1991–2020 normals for Pitt Meadows, one of its 450 normals locations.
| Distance from the town | 10 km east |
| Station altitude | 5 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Snowfall from | Vancouver International (Airport), 25 km |
| Coldest reading, 1991–2020 | −16.3°C |
| Hottest reading, 1991–2020 | 37.6°C |
| Average wind | 4.8 km/h on average, most often from the east |
| Next-nearest location | Vancouver (Harbour), 23 km |
How Port Mann 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 British Columbia.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Port Mann’s own would show the same figures). Port Mann has few close neighbours with figures, so the list reaches 11–21 km out.
Port Mann weather by month
Each month’s normals, 1991–2020: high, low, mean, precipitation and snowfall.
| Month | High | Low | Mean | Rain & snow | Snow |
|---|---|---|---|---|---|
| January | 6.8°C | 0.5°C | 3.6°C | 252 mm | 12 cm |
| February | 8.8°C | 0.4°C | 4.6°C | 134 mm | 5 cm |
| March | 11.3°C | 2.3°C | 6.8°C | 173 mm | 3 cm |
| April | 14.9°C | 4.5°C | 9.7°C | 105 mm | under 1 cm |
| May | 19.0°C | 7.9°C | 13.5°C | 95 mm | 0 cm |
| June | 21.3°C | 10.8°C | 16.1°C | 69 mm | 0 cm |
| July | 25.0°C | 12.6°C | 18.8°C | 48 mm | 0 cm |
| August | 25.1°C | 12.4°C | 18.8°C | 36 mm | 0 cm |
| September | 21.5°C | 9.8°C | 15.7°C | 94 mm | 0 cm |
| October | 15.0°C | 5.9°C | 10.5°C | 180 mm | under 1 cm |
| November | 9.6°C | 2.4°C | 6.0°C | 249 mm | 3 cm |
| December | 6.1°C | 0.1°C | 3.1°C | 214 mm | 14 cm |
| Year | 15.4°C | 5.8°C | 10.6°C | 1,649 mm | 37 cm |
A February here can run warm or cold, its average moving by about 1.7°C; the steadiest month is October
September has the widest record range, 0.9°C in 2000 to 34.4°C in 2017; the tick on each bar is the month’s normal.
Where Port Mann’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s 1991–2020 Canadian Climate Normals for Pitt Meadows, the nearest location with a full year 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: a pool of Canadian towns and neighbourhoods of 2,500 or more, read alike; whole cities and reserves stay out of it.
- 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 Port Mann’s climate
How warm does Port Mann get in summer?
A normal August afternoon tops out at about 25.1°C, the year’s high point.
How cold does Port Mann get in winter?
Winter bottoms out in December, with lows near 0.1°C.
How much rain and snow does Port Mann get?
Around 1,649 mm a year in all, from 252 mm in January down to 36 mm in August.
Are these figures for Port Mann itself?
They are borrowed from Pitt Meadows, the nearest place to Port Mann where ECCC publishes 1991–2020 normals.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Port Mann →
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).