Env. Canada, European, American side by side around Cornwall and nearby towns.Live rain radar →
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Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
Cornwall, 08 is at its warmest in Jul (average highs near 27°C) and coldest in Feb (lows around -9°C), with roughly 1129 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for Cornwall right now, and see exactly where they disagree.
Cornwall climate by month
average daytime high and overnight low across a typical year
Jan
-1°
-7°
Feb
1°
-9°
Mar
5°
-3°
Apr
12°
2°
May
20°
9°
Jun
24°
14°
Jul
27°
18°
Aug
24°
16°
Sep
23°
14°
Oct
16°
8°
Nov
7°
0°
Dec
1°
-5°
Common questions
What's the weather in Cornwall today?
On this page we show what Env. Canada, European, American each forecast for Cornwall today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Cornwall today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from Env. Canada, European, American for Cornwall and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Cornwall?
No single model is always right. Env. Canada, European, American each run their own physics, so we line all three up: when they agree the Cornwall forecast is reliable, and when they split you should expect surprises. See our tested CA accuracy scoreboard for how the models compare.
What is the warmest month in Cornwall?
Jul is typically the warmest month in Cornwall, with average highs around 27°C.
How cold does Cornwall get?
The coldest month in Cornwall is Feb, when overnight lows average about -9°C.
How much rain does Cornwall get?
Cornwall sees roughly 1129 mm of precipitation a year, with Aug usually the wettest month.
The forecasts Canadians check
Environment Canada runs the national GEM model as open data, so it sits right in the comparison above. The Weather Network and AccuWeather keep theirs closed, so we link you to them.