Cornwall (Newquay)
May
Weather in Cornwall for May 2026
Your guide to Cornwall weather in May - trends and predictions
The forecast for the next days in Cornwall predicts temperatures to be around 13 °C, close to the historical average.
In general, the average temperature in Cornwall at the beginning of May is 13 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 14.7 °C by the end of May.
The climate of Cornwall in May is notably wet, with an average of 14 rainy days, and a total of 46.3 mm of precipitation.
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Temperatures
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17
Dry days
14
Rainy days
0
Snow days
14°/10°
Temperatures
23 km/h
Avg max wind
83 %
Avg humidity
Cornwall Weather May
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Temperatures trend during May in Cornwall
See the weather trend as well as the moving average line
May weather in Cornwall day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Patchy rain possible | 15° /10° | 0.9 mm | 3 | |
| 2 May |  Moderate rain | 12° /9° | 8.5 mm | 3 | |
| 3 May | Patchy rain possible | 13° /9° | 2.3 mm | 3 | |
| 4 May | Patchy rain possible | 14° /9° | 0.7 mm | 5.1 | |
| 5 May |  Partly cloudy | 12° /9° | 0.1 mm | 4.7 | |
| 6 May | Patchy rain possible | 12° /8° | 2.9 mm | 3.8 | |
| 7 May | Patchy rain possible | 13° /9° | 2.4 mm | 4.6 | |
| 8 May | Moderate rain | 14° /9° | 7.1 mm | 5.5 | |
| 9 May | Patchy rain possible | 13° /10° | 0.7 mm | 3 | |
| 10 May | Patchy rain possible | 12° /10° | 0.3 mm | 3 | |
| 11 May | Patchy rain possible | 11° /9° | 0.6 mm | 2 | |
| 12 May | Patchy rain possible | 11° /8° | 0.5 mm | 2 | |
| 13 May | Patchy rain possible | 9° /8° | 2.9 mm | 2 | |
| 14 May |  Cloudy | 11° /9° | 0.1 mm | 2 | |
| 15 May | Patchy rain possible | 14° /7° | 0.6 mm | 3 | |
| 16 May | Patchy rain possible | 15° /12° | 0.6 mm | 3 | |
| 17 May |  Overcast | 14° /11° | 0 mm | 3 | |
| 18 May | Patchy rain possible | 15° /10° | 0.1 mm | 4 | |
| 19 May | Light rain shower | 16° /10° | 1.6 mm | 4 | |
| 20 May | Light rain shower | 16° /10° | 0.7 mm | 4 | |
| 21 May | Light rain shower | 14° /10° | 3 mm | 3 | |
| 22 May | Patchy rain possible | 15° /11° | 0.3 mm | 4 | |
| 23 May | Patchy rain possible | 14° /10° | 0.3 mm | 4 | |
| 24 May | Patchy rain possible | 14° /11° | 1 mm | 4 | |
| 25 May | Light rain shower | 14° /10° | 3 mm | 3 | |
| 26 May |  Patchy light drizzle | 14° /11° | 4.1 mm | 3 | |
| 27 May | Light rain shower | 14° /11° | 3.2 mm | 4 | |
| 28 May | Light drizzle | 15° /12° | 1.3 mm | 4 | |
| 29 May | Patchy rain possible | 16° /12° | 0.3 mm | 4 | |
| 30 May | Patchy rain possible | 15° /12° | 1.1 mm | 4 | |
| 31 May | Patchy rain possible | 15° /11° | 0.2 mm | 4 | |
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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.
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Cornwall in May - FAQ
What are the expected maximum and minimum temperatures in Cornwall during May?
During May, expect a variety of temperatures with highs around 14° and lows near 10°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cornwall during May?
In May, Cornwall can expect light to moderate rainfall, totaling 46.3 mm across approximately 14 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Cornwall during May?
The average wind speed in Cornwall during May is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
Cornwall water temperatures in May
The average water temperature of the Atlantic Ocean near Cornwall in May is 9.4 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Cornwall in May?
- The average water temperature in Cornwall in May is 9.4 °C.
- Can you swim in Cornwall in May?
- Dangerously cold water: hypothermia risk is high. Only experienced cold-water swimmers with proper gear should consider entering.
May rainfall patterns in Cornwall
Explore the daily rainfall trends and prepare for Cornwalls May weather 💧
Typically, Cornwall has 14 rainy days in May with a total of 46.3 mm of rainfall.
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