Photo: UBC Micrometeorology · CC BY 2.0Few Canadian towns get fewer frosts than Delta
Midsummer highs settle at about 22.4°C. Precipitation follows the seasons: November brings about 5.1 times as much as July. Summers stay cool: July afternoons here are cooler than in 96% of Canadian towns. Have the furnace checked before November to April, the months that average under 10°C.
No ECCC station in Delta has 1991–2020 normals; the page reads Vancouver International (Airport), 16 km north-west, instead.
A year in Delta at a glance
Each month’s typical high and low, in °C.
What stands out about Delta’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in British Columbia beside it.
What a year in Delta feels like
Each season’s and each month’s usual high and low, 1991–2020.
40 frost days and 79 days above 20°C a year
The frost season runs November to March, peaking in January at about 10 nights.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 1,160 mm of rain and snow a year
On about 137 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
About 37 cm of snow a year
Snow falls from November to March, most of all in December (about 14 cm).
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Delta
87% of a year’s heating need falls between October and April. Months averaging under 10°C: November to April.
Every day colder than 18°C on average adds its gap in degrees to the year’s heating total. Homes here need less heating than 97% of Canadian towns.
Living with Delta’s climate
What the normals mean for a garden, a day outside and the depth of winter.
The frost-free stretch runs from about 19 March to about 10 November, some 235 days in a normal year.
The outdoor season by the averages is Jun, Jul, Aug and Sep, with highs of 17–27°C and lows of 8°C or more.
Parks & trails →About 6 days a year turn sultry, with the humidex past 30.
What averages leave out, the floods and ice storms, is on Delta’s hazards page.
Flood & hazards →ECCC’s normals location: Vancouver International (Airport)
Behind the 1991–2020 normals for Vancouver International (Airport) are 2 stations, which ECCC combines into one record.
| Distance from the town | 16 km north-west |
| Station altitude | 4 m |
| Completeness | at least 25 years |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −15.2°C |
| Hottest reading, 1991–2020 | 34.4°C |
| Average wind | 13.0 km/h on average, most often from the east |
| Next-nearest location | Vancouver (Harbour), 23 km |
How Delta 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 British Columbia.
Nearby towns’ climate
Places around Delta whose figures come from another normals location.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Delta Vancouver International (Airport) | 22.4°C | 1.4°C | 1,160 mm |
| Colebrook 9.0 km · Pitt Meadows | 25.0°C 2.6°C warmer | 0.5°C 0.9°C colder | 1,649 mm |
| Tsawwassen 11 km · Vancouver International (Airport) | 22.4°C about the same | 1.4°C about the same | 1,160 mm |
Delta 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 | 6.8°C | 1.4°C | 4.1°C | 174 mm | 12 cm |
| February | 7.9°C | 1.5°C | 4.7°C | 91 mm | 5 cm |
| March | 10.1°C | 3.3°C | 6.7°C | 106 mm | 3 cm |
| April | 13.1°C | 5.7°C | 9.4°C | 86 mm | under 1 cm |
| May | 16.9°C | 9.0°C | 13.0°C | 59 mm | 0 cm |
| June | 19.6°C | 11.9°C | 15.8°C | 51 mm | 0 cm |
| July | 22.4°C | 13.9°C | 18.2°C | 34 mm | 0 cm |
| August | 22.4°C | 14.0°C | 18.2°C | 36 mm | 0 cm |
| September | 19.1°C | 11.2°C | 15.2°C | 52 mm | 0 cm |
| October | 13.5°C | 7.0°C | 10.3°C | 124 mm | under 1 cm |
| November | 9.3°C | 3.6°C | 6.4°C | 175 mm | 3 cm |
| December | 6.6°C | 1.2°C | 3.9°C | 172 mm | 14 cm |
| Year | 14.0°C | 7.0°C | 10.5°C | 1,160 mm | 37 cm |
From year to year, January moves by 1.7°C, more than any month, and August least
Records from 1991 to 2020: no month spans more than December, between −15.2°C (2008) and 14.3°C (2005).
Where Delta’s numbers come from
Averages over 30 years, not a forecast.
- Normals: ECCC’s normals for Vancouver International (Airport), 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: hours of sunshine, missing from the 1991–2020 normals, and a height correction: the town has no elevation on file.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Delta’s climate
How warm does Delta get in summer?
Of all twelve months, July has the warmest afternoons, about 22.4°C.
How cold does Delta get in winter?
At its coldest, in December, the normal low is 1.2°C.
How much rain and snow does Delta get?
Rain and snow add up to about 1,160 mm of water a year; November brings the most (175 mm), July the least (34 mm).
How long does snow stay on the ground?
On about 8 days a year the ground keeps at least 1 cm of snow.
Are these figures for Delta itself?
Not exactly. Delta lacks a normals station, so Vancouver International (Airport) supplies the figures.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Delta →
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).