Cornwall
May
Weather in Cornwall for May 2026
Your guide to Cornwall weather in May - trends and predictions
In general, the average temperature in Cornwall at the beginning of May is 15.3 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 21.3 °C by the end of May.
Cornwall in May brings notable rainfall, with an average of 18 rainy days and a total precipitation of 96 mm.
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Temperatures
Rain 🌧️
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13
Dry days
18
Rainy days
0
Snow days
18°/8°
Temperatures
16 km/h
Avg max wind
76 %
Avg humidity
Cornwall Weather May
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Temperatures trend during May in Cornwall
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May weather in Cornwall day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Overcast | 13° /3° | 9.7 mm | 3 | |
| 2 May |  Heavy rain at times | 14° /6° | 5.1 mm | 4 | |
| 3 May | Heavy rain at times | 13° /5° | 3.6 mm | 3 | |
| 4 May | Overcast | 13° /5° | 3.5 mm | 3 | |
| 5 May | Overcast | 16° /7° | 3.7 mm | 4 | |
| 6 May | Overcast | 20° /8° | 2.1 mm | 4 | |
| 7 May | Overcast | 18° /7° | 1.7 mm | 4 | |
| 8 May |  Sunny | 12° /6° | 0.7 mm | 3 | |
| 9 May |  Partly cloudy | 11° /4° | 0.2 mm | 3 | |
| 10 May | Partly cloudy | 17° /4° | 0 mm | 4 | |
| 11 May | Partly cloudy | 17° /7° | 1.5 mm | 5 | |
| 12 May | Overcast | 18° /8° | 1.2 mm | 4 | |
| 13 May | Partly cloudy | 20° /8° | 0.7 mm | 5 | |
| 14 May | Partly cloudy | 19° /10° | 6 mm | 5 | |
| 15 May | Partly cloudy | 21° /9° | 0 mm | 5 | |
| 16 May |  Moderate or heavy rain shower | 21° /10° | 3.6 mm | 5 | |
| 17 May | Partly cloudy | 18° /10° | 3.6 mm | 5 | |
| 18 May | Sunny | 17° /6° | 3.5 mm | 4 | |
| 19 May | Overcast | 17° /6° | 0.1 mm | 4 | |
| 20 May | Moderate or heavy rain shower | 18° /10° | 9 mm | 4 | |
| 21 May |  Patchy rain possible | 20° /10° | 2 mm | 5 | |
| 22 May | Partly cloudy | 18° /8° | 1 mm | 4 | |
| 23 May | Sunny | 18° /8° | 0.1 mm | 4 | |
| 24 May | Moderate or heavy rain shower | 13° /5° | 7 mm | 3 | |
| 25 May | Partly cloudy | 18° /3° | 4 mm | 4 | |
| 26 May | Partly cloudy | 21° /7° | 0 mm | 5 | |
| 27 May | Sunny | 24° /9° | 3.2 mm | 6 | |
| 28 May | Sunny | 24° /11° | 0.8 mm | 6 | |
| 29 May | Sunny | 19° /11° | 2.5 mm | 5 | |
| 30 May | Partly cloudy | 22° /9° | 0 mm | 5 | |
| 31 May | Partly cloudy | 21° /8° | 0 mm | 5 | |
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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.
Change Month
Cornwall in May - FAQ
What are the expected maximum and minimum temperatures in Cornwall during May?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cornwall during May?
Moderate rainfall is anticipated in Cornwall during May, with a total of 96 mm spread over approximately 18 days. Considering plans for rainy days is advisable.
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.
May rainfall patterns in Cornwall
Explore the daily rainfall trends and prepare for Cornwalls May weather 💧
UV exposure in Cornwall during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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