Cornwall
May
Weather in Cornwall for May 2025
Your guide to Cornwall weather in May - trends and predictions
In general, the average temperature in Cornwall at the beginning of May is 14.3 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 22 °C by the end of May.
Cornwall sees moderate rainfall in May, averaging 6 rainy days.
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25
Dry days
6
Rainy days
0
Snow days
21°/5°
Temperatures
16 km/h
Avg max wind
76 %
Avg humidity
Cornwall in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  13° | 2  13° | 3 13° | 4  11° | |||
| 5 13° | 6 18° | 7 19° | 8  14° | 9  13° | 10 17° | 11 18° |
| 12 17° | 13 17° | 14 16° | 15 20° | 16 18° | 17 16° | 18 18° |
| 19 23° | 20 22° | 21  23° | 22 23° | 23 24° | 24 15° | 25 18° |
| 26 21° | 27 24° | 28 24° | 29 20° | 30 23° | 31 24° |
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Temperatures trend during May in Cornwall
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Moderate or heavy rain shower | 13° /4° | 14.6 mm | 3 | |
| 2 May | Heavy rain at times | 13° /5° | 7.6 mm | 4 | |
| 3 May | Heavy rain at times | 13° /4° | 5.5 mm | 3 | |
| 4 May | Overcast | 11° /6° | 5.2 mm | 3 | |
| 5 May | Overcast | 13° /7° | 5.6 mm | 3 | |
| 6 May | Overcast | 18° /7° | 1.4 mm | 4 | |
| 7 May | Overcast | 19° /6° | 0 mm | 5 | |
| 8 May | Sunny | 14° /6° | 1 mm | 4 | |
| 9 May | Partly cloudy | 13° /4° | 0.3 mm | 4 | |
| 10 May | Partly cloudy | 17° /4° | 0 mm | 5 | |
| 11 May | Partly cloudy | 18° /8° | 2.2 mm | 5 | |
| 12 May | Overcast | 17° /9° | 1.9 mm | 4 | |
| 13 May | Partly cloudy | 17° /6° | 1.1 mm | 5 | |
| 14 May | Partly cloudy | 16° /8° | 9 mm | 5 | |
| 15 May | Partly cloudy | 20° /7° | 0.1 mm | 5 | |
| 16 May | Moderate or heavy rain shower | 18° /7° | 5.4 mm | 4 | |
| 17 May | Partly cloudy | 16° /7° | 0.5 mm | 5 | |
| 18 May | Sunny | 18° /6° | 5.2 mm | 5 | |
| 19 May | Overcast | 23° /7° | 0.2 mm | 6 | |
| 20 May | Moderate or heavy rain shower | 22° /13° | 13.5 mm | 5 | |
| 21 May | Patchy rain possible | 23° /12° | 3 mm | 6 | |
| 22 May | Partly cloudy | 23° /10° | 0.1 mm | 6 | |
| 23 May | Sunny | 24° /9° | 0.1 mm | 6 | |
| 24 May | Moderate or heavy rain shower | 15° /6° | 6.6 mm | 4 | |
| 25 May | Partly cloudy | 18° /3° | 0.2 mm | 5 | |
| 26 May | Partly cloudy | 21° /6° | 0 mm | 6 | |
| 27 May | Sunny | 24° /9° | 4.7 mm | 6 | |
| 28 May | Sunny | 24° /11° | 1.2 mm | 6 | |
| 29 May | Sunny | 20° /10° | 0 mm | 5 | |
| 30 May | Partly cloudy | 23° /8° | 0 mm | 6 | |
| 31 May | Partly cloudy | 24° /9° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Cornwall in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cornwall forecast closer to your planned date for the most up-to-date weather information.
Cornwall in May - FAQ
What are the expected maximum and minimum temperatures in Cornwall during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cornwall during May?
Significant rainfall exceeding 179.8 mm is expected in Cornwall during May, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cornwall during May?
The average wind speed in Cornwall during May is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
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