Cornwall in August
7.5out of 10
Yes, a good time to go
Warm and comfortable: highs around 25°C. Frequent rain: about 12 rainy days.
25°CAvg high
16°CAvg low
12Rainy days (94 mm)
13:54 hDaylight
06:06Sunrise · 20:00 Sunset
Why this score
- Warm and comfortable: highs around 25°C
- Frequent rain: about 12 rainy days
What to wear and pack
- T-shirts and light layers
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in August is fairly consistent from year to year (2.5 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -3°C | -12°C | 73 mm | 12 | – | – | 3.5 |
| February | -2°C | -11°C | 62 mm | 10 | – | – | 3.7 |
| March | 4°C | -6°C | 76 mm | 11 | – | – | 4.2 |
| April | 12°C | 2°C | 101 mm | 12 | – | – | 5.7 |
| May | 20°C | 9°C | 98 mm | 13 | – | – | 6.9 |
| June | 24°C | 13°C | 105 mm | 12 | – | – | 7.3 |
| July | 26°C | 16°C | 100 mm | 13 | – | – | 7.3 |
| August | 25°C | 16°C | 94 mm | 12 | – | – | 7.5 |
| September | 21°C | 11°C | 92 mm | 11 | – | – | 7.5 |
| October | 14°C | 5°C | 104 mm | 12 | – | – | 6.0 |
| November | 7°C | -1°C | 84 mm | 12 | – | – | 4.8 |
| December | 0°C | -7°C | 83 mm | 12 | – | – | 3.4 |
Frequently asked questions
How hot is Cornwall in August?
Daytime highs average 25°C and nights about 16°C.
When is the best time to visit Cornwall?
The best months are August, September, June, July.