Callaghan is among the frostiest of Canadian towns
Peak summer warmth arrives in July, with afternoons near 23.0°C. Summers stay cool: July afternoons here are cooler than in 90% of Canadian towns. The wettest month is July; the driest is February. About 78 days a year bring 1 mm of precipitation or more.
Environment and Climate Change Canada’s 1991–2020 normals at its Edmonton (Airport) station, 10 km south.
A year in Callaghan at a glance
Each month’s typical high and low, in °C.
What stands out about Callaghan’s climate
Compared with Canadian towns, with its place among towns of 2,500+ in Alberta beside it.
What a year in Callaghan feels like
Typical highs and lows by season and by month, from ECCC’s 1991–2020 normals.
About 211 frosts and 90 warm days a year
From September to May frost is routine, and in January it comes on almost every night. Deep cold, under −20°C, comes on about 38 nights a year.
Frost days by month
Average days at 0°C or below
Days above 20°C by month
Average days
About 434 mm of rain and snow a year
Rain and snow by month
Millimetres
Rain alone by month
Millimetres
Snowfall: about 127 cm in a normal year
The snow season runs October to May; January brings the most, about 24 cm.
Snowfall by month
Centimetres
Snow on the ground by month
Centimetres at month’s end
Heating a home in Callaghan
87% of a year’s heating need falls between October and April. Months averaging under 10°C: October to April.
Every day colder than 18°C on average adds its gap in degrees to the year’s heating total. That means homes here need more heating than 93% of Canadian towns.
Living with Callaghan’s climate
The averages read for the garden, the outdoors and the coldest and hottest days.
On average the last spring frost comes around 27 May and the first autumn frost around 10 September: about 105 frost-free days between.
Mild days and mild nights together (17–27°C by day, 8°C or more at night) belong to Jul.
Parks & trails →The wind chill passes −20 on about 67 days in a normal year.
Humid summer days, the humidex above 30, number about 11 a year.
Storms, floods and heat waves sit outside these normals; Callaghan’s hazards page covers them.
Flood & hazards →ECCC’s normals location: Edmonton (Airport)
Behind the 1991–2020 normals for Edmonton (Airport) are 3 stations, which ECCC combines into one record.
| Distance from the town | 10 km south |
| Station altitude | 723 m |
| Completeness | meets the WMO “3 and 5” rule |
| WMO standard normals | No |
| Coldest reading, 1991–2020 | −46.1°C |
| Hottest reading, 1991–2020 | 35.6°C |
| Average wind | 12.5 km/h on average, most often from the south |
| Next-nearest location | Edmonton (City), 18 km |
How Callaghan compares
Compared with 2,611 towns and neighbourhoods of 2,500 or more across Canada; the dots mark the other normals locations in Alberta.
Nearby towns’ climate
Places around Callaghan whose figures come from another normals location. Callaghan has no close neighbour with figures; the nearest is 13 km away.
| Town | July high | January low | Rain & snow |
|---|---|---|---|
| Callaghan Edmonton (Airport) | 23.0°C | −18.1°C | 434 mm |
| Edmonton 13 km · Edmonton (City) | 23.5°C 0.5°C warmer | −14.7°C 3.4°C milder | 423 mm |
Callaghan 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 | −6.5°C | −18.1°C | −12.3°C | 22 mm | 24 cm |
| February | −4.1°C | −16.6°C | −10.4°C | 12 mm | 14 cm |
| March | 0.5°C | −11.2°C | −5.3°C | 17 mm | 19 cm |
| April | 10.1°C | −3.2°C | 3.5°C | 30 mm | 16 cm |
| May | 17.6°C | 2.7°C | 10.1°C | 47 mm | 6 cm |
| June | 20.7°C | 7.5°C | 14.1°C | 75 mm | under 1 cm |
| July | 23.0°C | 9.4°C | 16.2°C | 87 mm | 0 cm |
| August | 22.4°C | 7.8°C | 15.1°C | 53 mm | under 1 cm |
| September | 17.8°C | 2.8°C | 10.3°C | 35 mm | 1 cm |
| October | 10.0°C | −3.3°C | 3.4°C | 22 mm | 10 cm |
| November | 0.2°C | −10.6°C | −5.2°C | 20 mm | 19 cm |
| December | −5.3°C | −16.7°C | −11.0°C | 15 mm | 16 cm |
| Year | 8.9°C | −4.1°C | 2.4°C | 434 mm | 127 cm |
February strays furthest from its normal year to year, by 4.3°C; June the least
Over 1991–2020, March saw both −42.7°C (2009) and 24.2°C (2004), the widest span of any month.
Where Callaghan’s numbers come from
Averages over 30 years, not a forecast.
- Normals: Environment and Climate Change Canada’s 1991–2020 normals, Edmonton (Airport): the nearest of its locations with every month’s temperatures.
- Comparisons: Canadian towns and neighbourhoods of at least 2,500, each placed by its nearest location (city totals and reserves excluded).
- Not on this page: sunshine, which none of ECCC’s 450 locations publishes for 1991–2020, and the town’s own height above sea level, so no figure is adjusted for altitude.
Canadian Climate Normals 1991–2020 · ECCC Data Services End-use Licence. Data Source: Environment and Climate Change Canada
Questions about Callaghan’s climate
How warm does Callaghan get in summer?
A normal July afternoon tops out at about 23.0°C, the year’s high point.
How cold does Callaghan get in winter?
In January, the coldest month, the typical low is −18.1°C.
How much rain and snow does Callaghan get?
Over twelve months, rain and melted snow come to 434 mm; the range runs from 12 mm in February to 87 mm in July.
How long does snow stay on the ground?
There is 1 cm of snow or more on the ground on roughly 145 days a year.
Are these figures for Callaghan itself?
Almost: ECCC’s Edmonton (Airport) location, which gives these figures, lies a short way outside Callaghan.
Data Source: Environment and Climate Change Canada · ECCC Data Services End-use Licence Today’s forecast for Callaghan →
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).