When to visit
Cornwall?

Discover the best time of year, based on historical climate, temperature, and precipitation.

Cornwall
Ontario · Canada

The best time to visit Cornwall is May, June, September, when the weather, flight prices, and crowds align. — unpredictable climate

Climate score
October
54

Mixed climate

🌥Mild

3%snow days
Rare snowfall
12%outdoor comfort
Limited outdoor comfort
1%ideal warm days
Rarely warm & sunny
Significant warming— +2.4° vs. 15 years agoCooling down through the month
Temperature
8–16°C
Moderate temperature variation · Cold nights — bring layers
Feels like
6–14°C
Dry
Precipitation
93mm
Moderate rain · 13 days
Sunshine
6.3h
Mostly cloudy
Humidity (%)
78%
Dry
Annual Climate Analysis
Temperature, Rain & Feels Like
Rain
Actual Temp
Feels Like
-20°-10°0°10°20°30°40°JanFebMarAprMayJunJulAugSepOctNovDec
International eSIM

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Tourist Crowds
Monthly visitor flow
61
Shoulder season
050100JanFebMarAprMayJunJulAugSepOct61NovDec
Flights to Cornwall

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Monthly Overview
Score11121332847674738354179
ClimatePolarPolarColdColdMildHumidHumidHumidMildMildColdPolar
Temperature-9–-2°C-10–0°C-4–5°C2–12°C8–20°C14–25°C18–27°C17–25°C13–22°C8–16°C1–8°C-4–2°C
Feels like-14–-6°C-15–-5°C-8–1°C-2–9°C6–19°C14–25°C19–28°C18–27°C13–22°C6–14°C-2–5°C-9–-2°C
Precipitation81mm
12 days
68mm
11 days
81mm
11 days
90mm
12 days
63mm
12 days
114mm
13 days
132mm
13 days
140mm
13 days
74mm
10 days
93mm
13 days
75mm
12 days
100mm
14 days
Sunshine3.6h
☀︎ 39%
5.2h
☀︎ 50%
6.3h
☀︎ 53%
7.6h
☀︎ 56%
10.8h
☀︎ 73%
10.6h
☀︎ 68%
11.7h
☀︎ 77%
10.6h
☀︎ 76%
9.3h
☀︎ 74%
6.3h
☀︎ 57%
5.3h
☀︎ 55%
2.7h
☀︎ 31%
WindW · 17 km/hW · 18 km/hW · 19 km/hW · 20 km/hW · 17 km/hSW · 17 km/hSW · 15 km/hSW · 14 km/hSW · 15 km/hSW · 17 km/hW · 19 km/hW · 19 km/h
Humidity (%)81%75%72%68%66%71%76%79%79%78%76%80%
Perfect days0%0%1%6%26%38%37%44%38%11%1%0%
Dry streak6d7d8d7d8d6d5d7d8d6d6d6d
Sunny streak6d6d9d9d13d12d18d17d12d7d6d3d
Extreme heat——————1%—————
Extreme cold95%94%83%35%1%————5%47%82%
Temperature+0.8°+2.1°+2.7°+0.1°+2.3°+1.1°+1.9°+1.0°+0.7°+2.4°+0.9°+1.9°
RainfallStableStableStableStableGetting drierStableStableGetting wetterStableStableStableStable
Ideal warm days0%0%0%1%7%19%31%24%12%1%0%0%
Outdoor comfort0%0%1%6%26%34%28%38%39%12%1%0%
Dry week odds4%9%11%7%8%4%2%5%12%2%4%3%
Heavy rain2%1%1%4%3%4%3%3%3%5%1%3%
Snow days58%57%39%18%1%————3%24%54%
Muggy days—————3%11%8%2%———
Day length9.2h10.4h11.9h13.5h14.9h15.6h15.2h14.0h12.5h10.9h9.6h8.8h
Tourist CrowdsLow seasonLow seasonLow seasonShoulder seasonShoulder seasonHigh seasonHigh seasonHigh seasonHigh seasonShoulder seasonShoulder seasonShoulder season

Frequently asked questions

What is the best time to visit Cornwall?

The best time to visit Cornwall is May, September, June, July, August, with temperatures between 8 °C and 27 °C. The best month is May. May is shoulder season.

What is the weather like in Cornwall?

Cornwall has a climate with an overall score of 4.5/10. Annual temperatures range from -10 °C to 27 °C.

What is the hottest month in Cornwall?

The hottest month in Cornwall is July, with average highs of 27 °C and lows of 18 °C.

What is the rainiest month in Cornwall?

The rainiest month in Cornwall is August, with an average of 140 mm of precipitation.

When is peak season in Cornwall?

Peak season in Cornwall is June, July, August, September. This is the most popular period, with the highest tourism levels and prices.

When is shoulder season in Cornwall?

Shoulder season in Cornwall falls in April, May, October, November, December. It offers a good balance of decent weather and lower prices compared to peak season.