Region, United Kingdom
Cornwall weather by month and the best time to visit
When to go to Cornwall
May–June and September have good weather with fewer people. July–August is busiest and priciest. Surf is strongest in autumn and winter, but many places shut.
Cornwall weather by month
Average daily high, rainfall and conditions.
- Jan9°118 mm
- Feb9°92 mm
- Mar10°83 mm
- Apr12°66 mm
- May14°67 mm
- Jun17°74 mm
- Jul18°88 mm
- Aug18°90 mm
- Sep17°68 mm
- Oct15°117 mm
- Nov12°128 mm
- Dec10°124 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 9°C49°F | 7°C44°F | 118 mm | 85% | Cold |
| February | 9°C48°F | 6°C43°F | 92 mm | 85% | Cold |
| March | 10°C50°F | 7°C44°F | 83 mm | 85% | Cold |
| April | 12°C53°F | 8°C47°F | 66 mm | 84% | Cool |
| May | 14°C57°F | 10°C51°F | 67 mm | 83% | Cool |
| June | 17°C62°F | 13°C56°F | 74 mm | 83% | Cool |
| July | 18°C65°F | 15°C59°F | 88 mm | 83% | Pleasant |
| August | 18°C65°F | 15°C59°F | 90 mm | 84% | Pleasant |
| September | 17°C63°F | 14°C57°F | 68 mm | 84% | Cool |
| October | 15°C59°F | 12°C54°F | 117 mm | 85% | Cool |
| November | 12°C54°F | 10°C49°F | 128 mm | 85% | Cool |
| December | 10°C51°F | 8°C46°F | 124 mm | 85% | Cold |
Best months across United Kingdom
| Place | Best months | Warmest month |
|---|---|---|
| London | May–Jul, Sep | Jul (23°C) |
| Edinburgh | May–Jun, Aug–Sep | Jul (18°C) |
| Manchester | May–Jul, Sep | Jul (20°C) |
| Liverpool | May–Jul, Sep | Jul (19°C) |
| Oxford | May–Jun, Sep | Jul (22°C) |
| Bath | May–Jun, Sep | Jul (21°C) |
| Cambridge | May–Jun, Sep | Jul (23°C) |
| Glasgow | May–Jul, Sep | Jul (18°C) |
| Brighton | May–Jul, Sep | Jul (21°C) |
| Scottish Highlands | May–Jun, Sep | Jul (18°C) |
| Isle of Skye | May–Jun, Sep | Jul (15°C) |
| York | May–Jun, Sep–Oct | Jul (21°C) |
| Bristol | May–Jul, Sep | Jul (22°C) |
| Lake District | May–Jun, Sep–Oct | Jul (18°C) |
| Cornwall | May–Jun, Sep | Jul (18°C) |
| Cotswolds | May–Jun, Sep–Oct | Jul (22°C) |
| Belfast | May–Jul, Sep | Jul (17°C) |
| Cardiff | May–Jul, Sep | Jul (20°C) |
| Birmingham | May–Jul, Sep | Jul (21°C) |
| Newcastle | May–Jul, Sep | Jul (19°C) |
| Leeds | May–Jul, Sep | Jul (21°C) |
| Snowdonia | May–Jul, Sep | Jul (19°C) |
Quick answers
What is the best month to visit Cornwall?
May–Jun, Sep. May–June and September have good weather with fewer people. July–August is busiest and priciest. Surf is strongest in autumn and winter, but many places shut.
When is the rainy season in Cornwall?
Rain peaks in November with about 128 mm. No month averages 150 mm or more.
What is the hottest month in Cornwall?
July, with average highs of 18°C (65°F).
How cold does Cornwall get?
The coolest nights are in February, averaging 6°C (43°F).
More about Cornwall
Going to Cornwall solo?
SoloSquare is where travelers, nomads and locals in Cornwall meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.
Sources
- NASA POWER climatology (2001–2020)
- Visit Cornwall
- Great Western Railway
- Royal Cornwall Hospitals NHS Trust
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.