Winter Storm Warnings in Sudbury, Ontario
Sudbury sits deep in the Canadian Shield, where long winters and reliable cold make for a substantial snow season. Across the 13 years analyzed from 2012 through 2024, the city averaged 162.7 cm (64.1 inches) of snow annually — a meaningful accumulation that shapes how residents and emergency managers approach winter preparedness. The heaviest snowfall tends to arrive in January, December, and February, when Arctic air masses push south and lake-enhanced moisture from Georgian Bay and Lake Huron can intensify snowbands over the region.
Truly exceptional snow events are relatively rare here. On average, Sudbury sees fewer than one heavy-snow day per year — roughly 0.4 days annually — suggesting that while steady seasonal snowfall is the norm, dramatic single-storm totals are not an everyday occurrence.
A winter storm warning issued for Sudbury signals that conditions are expected to become dangerous, with significant snowfall, blowing snow, or severe cold posing real risks to travel and safety. Average winter overnight lows sit around −13.8 °C (7.2 °F), meaning any major snowstorm unfolds in genuinely bitter cold. It's worth noting that warning thresholds differ across regions — what triggers a warning in southern Ontario may not match the criteria used here in Northern Ontario, where higher snow tolerances and different climatological baselines apply.
| Years analyzed | 13 winters (2012–2024) |
|---|---|
| Avg. annual snowfall | 162.7 cm (64.1 in) |
| Snowiest months | January, December, February |
| Avg. winter overnight low | −13.8°C (7.2°F) |
| Heavy-snow days per year | 0.4 |
Climatology figures are approximate estimates for the period shown and may differ from official local records.
Watch vs warning: a winter storm watch means a major storm is possible in Sudbury within 12–48 hours (be prepared); a winter storm warning means it is happening or about to (take action now). For full definitions, see the complete winter storm warning guide.
Sudbury winter storm FAQ
Is there a winter storm warning in Sudbury right now?
The live status at the top of this page shows whether a winter storm warning, watch, or advisory is currently in effect for Sudbury, Ontario. It checks live forecast and alert data automatically and refreshes every time the page loads.
Does Sudbury get winter storm warnings often?
Sudbury sees heavy snow routinely, and winter storm warnings are a regular feature of its winters. The frequency varies year to year with the track of major storm systems.
How much snow triggers a winter storm warning in Sudbury?
Environment and Climate Change Canada (ECCC) issues winter warnings on criteria that vary by region and expected impact: how much snow or ice is forecast, over what period, and how disruptive it is likely to be for the area. There is no single fixed snow total.
What should I do during a winter storm warning in Sudbury?
Avoid travel if possible, stay indoors and keep warm, prepare for power outages, keep an emergency kit, and check on elderly or vulnerable neighbours. Follow guidance from Ontario authorities and Environment and Climate Change Canada (ECCC).
Winter storm warnings in nearby locations
- Winter storm warning in Barrie, ON
- Winter storm warning in Mississauga, ON
- Winter storm warning in Toronto, ON
- Winter storm warning in Hamilton, ON
- Winter storm warning in London, ON
- Winter storm warning in Windsor, ON
See all locations, read the latest winter weather news, or the full winter storm warning guide. Definitions follow Environment and Climate Change Canada (ECCC) criteria; thresholds vary by region.