Canadian Climate Normals & Historical Almanac
Explore 186 years of verified Canadian atmospheric extremes, 30-year WMO climate normals, and legendary historical storm archives from the High Arctic to the Great Lakes.
All-Time Meteorological Extremes
Coldest officially verified atmospheric temperature ever recorded in North American meteorological history. Gordon Toole recorded breath freezing in mid-air leaving steam trails, and sound carrying over 6 km.
Established during the unprecedented Pacific Northwest Heat Dome. Shattered the previous Canadian national record three consecutive days in a row.
Under the standard Environment Canada joint temperature and wind formula: actual temperature of -51.0°C with 56 km/h polar gale winds.
Created by intense subtropical high-pressure moisture pumping over northern Alberta boreal peatlands, creating tropical conditions.
A moist Pacific atmospheric river impacted sub-freezing Arctic air dammed in the Coast Mountains, dumping nearly 1.5 meters of snow in a single day.
World record candidate: Over 80 feet of cumulative snowfall recorded at 2,000 meters in the Monashee Range near Revelstoke.
Exposed western Vancouver Island coastline took the full direct landfall of a category-5 atmospheric river plume.
Recorded by the Canadian Distant Early Warning (DEW) Line radar base as an Arctic maritime bomb cyclone funneled through Davis Strait.
Classic Rocky Mountain Foehn/Chinook effect. Sub-zero Arctic inversion was abruptly scoured out by 100 km/h descending warm Pacific downslope winds, rising from -19°C to +8°C in one hour.
Province-by-Province Climate Analysis
Select any province or territory to review historical benchmark thresholds and normals.
Ontario
Humid Continental / Great Lakes Maritime
Canadian City Climate Normals Comparator
Compare official 30-year climate averages, annual snowfall, and frost dates between any two Canadian cities.
| Climate Metric (1991–2020 Normals) | Toronto (ON) | Vancouver (BC) |
|---|---|---|
| Mean Annual Temperature | 9.4 °C | 10.4 °C |
| Average July Daytime High | 27 °C | 22.2 °C |
| Average January Overnight Low | -6.7 °C | 1.4 °C |
| Average Annual Snowfall | 121.5 cm | 38.1 cm |
| Annual Sunshine Duration | 2066 hrs/yr | 1938 hrs/yr |
| Frost-Free Season Length | 179 days | 221 days |
| Typical First Fall Frost | October 24 | November 18 |
Canada's Legendary Weather Catastrophes
Case studies of the defining atmospheric events that reshaped Canadian emergency preparedness.
The Great North American Ice Storm of 1998
Over 80 mm of freezing rain over 5 continuous days brought down 30,000 utility poles and 1,000 transmission towers, leaving 4 million people without heat or power in sub-zero winter temperatures.
The Great Toronto Blizzard & Military Deployment
Four back-to-back major snow systems dumped 118 cm of snow over Toronto in under two weeks, grinding public transit to a halt and causing Mayor Mel Lastman to call in 400 Canadian Armed Forces soldiers with armoured vehicles.
The Pacific Northwest Heat Dome of 2021
An atmospheric omega-block trapped ultra-hot desert air over British Columbia, destroying centuries-old temperature records by unprecedented margins and triggering catastrophic wildfires.
Post-Tropical Cyclone Fiona (Atlantic Canadian Bomb)
The deepest barometric low ever recorded in Canadian history made landfall near Canso, Nova Scotia, generating historic storm surge, washing homes into the sea in Port aux Basques, and flattening extensive Acadian forests.
Edmonton Black Friday F4 Tornado
Canada's second deadliest tornado tore through eastern Edmonton and Strathcona County with winds estimated at 418 km/h, cutting a 40 km swath of devastation.