Photo: Kmsiever · Public domainLethbridge sits near the bottom of Canadian towns for rain and snow, with 373 mm a year
January mornings start at about −12.1°C. In July, afternoons here are warmer than in 63% of Canadian towns. From frozen January to warm July, readings climb 38°C. Comfortable outdoor weather lasts from June to August, with highs of 22–26°C.
1991–2020 normals from ECCC’s Lethbridge location, 7.1 km south-east.
A year in Lethbridge at a glance
Each month’s typical high and low, in °C.
What stands out about Lethbridge’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Lethbridge feels like
Seasons and months as ECCC’s 1991–2020 normals give them: a typical day’s high and low.
Frost on 175 days, 20°C on 112
From September to May frost is routine, and in December it comes on almost every night. On about 22 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 373 mm a year
The most falls in June, the least in February. On about 69 days a year, 1 mm or more falls.
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 108 cm in a normal year
Snow falls from August to May, most of all in March (about 18 cm).
Snowfall by month
Centimetres
Heating a home in Lethbridge
88% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
ECCC sums, over the year, how many degrees each day’s average falls short of 18°C.
Living with Lethbridge’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
Seedlings can go out once the average last frost, around 21 May, has passed; autumn’s first, near 17 September, ends a season of about 118 days.
For long days outdoors, Jun, Jul and Aug bring highs of 17–27°C and lows of 8°C or more.
Parks & trails →Frostbite weather, a wind chill under −20, turns up on about 41 days a year.
About 24 days a year turn sultry, with the humidex past 30.
For blizzards, floods and wildfire, turn to Lethbridge’s hazards page.
Flood & hazards →ECCC’s normals location: Lethbridge
Behind the 1991–2020 normals for Lethbridge are 4 stations, which ECCC combines into one record.
| Distance from the town | 7.1 km south-east |
| Station altitude | 929 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −41.9°C |
| Hottest reading, 1991–2020 | 40.1°C |
| Average wind | 17.1 km/h on average, most often from the west |
| Next-nearest location | Vauxhall, 65 km |
How Lethbridge 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 Alberta.
Nearby towns’ climate
Nearby places read from a different ECCC location (places on Lethbridge’s own would show the same figures). No closer places have figures: these lie 40–50 km from Lethbridge.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Lethbridge | 26.3°C | −12.1°C | 373 mm |
| Fort Macleod 40 km · Claresholm | 25.2°C 1.1°C cooler | −13.2°C 1.1°C colder | 428 mm |
| Barnwell 42 km · Vauxhall | 26.8°C 0.5°C warmer | −14.1°C 2.0°C colder | 373 mm |
| Blood 148 50 km · Carway | 24.0°C 2.3°C cooler | −10.9°C 1.2°C milder | 534 mm |
Lethbridge 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 | 0.1°C | −12.1°C | −6.0°C | 11 mm | 13 cm |
| February | 1.7°C | −11.0°C | −4.6°C | 10 mm | 15 cm |
| March | 6.4°C | −6.8°C | −0.2°C | 17 mm | 18 cm |
| April | 12.6°C | −1.3°C | 5.7°C | 28 mm | 13 cm |
| May | 18.2°C | 3.9°C | 11.1°C | 57 mm | 5 cm |
| June | 21.8°C | 8.3°C | 15.1°C | 93 mm | 0 cm |
| July | 26.3°C | 10.5°C | 18.4°C | 40 mm | 0 cm |
| August | 26.3°C | 9.4°C | 17.9°C | 33 mm | 1 cm |
| September | 21.0°C | 5.3°C | 13.2°C | 32 mm | 1 cm |
| October | 13.3°C | −0.6°C | 6.4°C | 24 mm | 10 cm |
| November | 5.5°C | −6.6°C | −0.5°C | 16 mm | 16 cm |
| December | 0.7°C | −11.2°C | −5.3°C | 12 mm | 15 cm |
| Year | 12.8°C | −1.0°C | 5.9°C | 373 mm | 108 cm |
February varies most from one year to the next (4.8°C), June least
The thirty-year records stretch furthest in March: a low of −38.0°C in 2002 and a high of 26.8°C in 2004.
Where Lethbridge’s numbers come from
Averages over 30 years, not a forecast.
- Normals: the 1991–2020 normals from ECCC for Lethbridge, its nearest location with complete temperatures.
- Comparisons: the 2,500-plus towns and neighbourhoods of Canada, each read from its closest normals location; whole cities and reserves aren’t counted.
- 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 Lethbridge’s climate
How warm does Lethbridge get in summer?
July is the warmest month, with average highs of 26.3°C.
How cold does Lethbridge get in winter?
Midwinter means January, when a typical night reaches −12.1°C.
How much rain and snow does Lethbridge get?
Measured as water, a year brings 373 mm: 93 mm in June, the wettest month, and 10 mm in February, the driest.
Are these figures for Lethbridge itself?
They are the normals for Lethbridge, measured just outside Lethbridge itself.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Lethbridge →
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).