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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the True North Brief Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above shows Longlac’s current conditions, with daytime highs typically ranging from –5°C to –20°C in January and climbing to the low 20s°C by July. This means cold, long winters and short, mild summers are the norm for this northern Ontario community.
What is the typical weather pattern for Longlac?
Longlac sits near Lake Nipigon in a continental climate zone, so expect dramatic seasonal swings. Winter averages near –15°C to –20°C overnight, often with lake-effect snow from the nearby water. Summers are brief, with July highs around 22°C, but nights can dip to 10°C. The area sees about 800–900 millimetres of precipitation annually, with snowfall dominating from November through April.
How does the forecast compare to nearby towns?
Longlac’s weather aligns closely with Hearst and Kapuskasing to the east, though lake influence from Nipigon can make it slightly cooler and snowier in winter. For a broader regional picture, check the Canada weather hub, or compare conditions in Winnipeg weather or Timmins weather for similar inland patterns.
How accurate is the Longlac 14-day forecast?
Long-term forecasts beyond 7 days have lower skill in this region due to shifting lake-effect systems. The live forecast above updates hourly, so use the Longlac weather hourly data for near-term planning.
Is Longlac prone to weather warnings?
Yes, especially in winter from November to March. Environment Canada issues snow squall warnings and extreme cold alerts frequently. Always check the weather warning page before travelling.
How does Longlac weather compare to Cochrane or Nipigon?
Cochrane sees slightly colder winter lows, while Nipigon, being closer to Lake Superior, gets heavier lake-effect snow. Longlac falls between these two—colder than Cochrane weather averages but less snowy than Nipigon.