Cornwall in May
6.9out of 10
Possible, with caveats
Mild: highs around 20°C. Frequent rain: about 13 rainy days.
20°CAvg high
9°CAvg low
13Rainy days (98 mm)
14:39 hDaylight
05:36Sunrise · 20:15 Sunset
Why this score
- Mild: highs around 20°C
- Frequent rain: about 13 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in May is fairly consistent from year to year (2.8 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 May?
Daytime highs average 20°C and nights about 9°C.
When is the best time to visit Cornwall?
The best months are August, September, June, July.