Cornwall
August
Weather in Cornwall for August 2025
Your guide to Cornwall weather in August - trends and predictions
In general, the average temperature in Cornwall at the beginning of August is 24.9 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 22.1 °C by the end of August.
Expect significant rainfall in Cornwall during August, with an average of 20 rainy days.
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11
Dry days
20
Rainy days
0
Snow days
23°/13°
Temperatures
14 km/h
Avg max wind
80 %
Avg humidity
Cornwall in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2 27° | 3  27° | ||||
| 4  27° | 5  23° | 6  24° | 7 22° | 8 22° | 9 24° | 10 24° |
| 11 22° | 12 22° | 13 24° | 14 25° | 15 25° | 16 27° | 17 25° |
| 18 23° | 19 18° | 20 21° | 21 18° | 22 21° | 23 24° | 24 24° |
| 25  22° | 26 22° | 27 24° | 28 22° | 29 23° | 30 21° | 31  21° |
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Temperatures trend during August in Cornwall
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Patchy rain possible | 24° /14° | 0.8 mm | 6 | |
| 2 Aug. | Patchy rain possible | 27° /14° | 0.2 mm | 7 | |
| 3 Aug. | Moderate or heavy rain shower | 27° /17° | 9.9 mm | 6 | |
| 4 Aug. | Heavy rain at times | 27° /17° | 12.2 mm | 6 | |
| 5 Aug. | Cloudy | 23° /14° | 3.2 mm | 5 | |
| 6 Aug. | Overcast | 24° /13° | 0 mm | 6 | |
| 7 Aug. | Moderate or heavy rain shower | 22° /13° | 15 mm | 5 | |
| 8 Aug. | Moderate or heavy rain shower | 22° /13° | 19.3 mm | 5 | |
| 9 Aug. | Patchy rain possible | 24° /15° | 39.7 mm | 6 | |
| 10 Aug. | Moderate or heavy rain shower | 24° /14° | 17.2 mm | 5 | |
| 11 Aug. | Patchy rain possible | 22° /13° | 3.5 mm | 5 | |
| 12 Aug. | Moderate or heavy rain shower | 22° /12° | 8.6 mm | 5 | |
| 13 Aug. | Patchy rain possible | 24° /14° | 0.7 mm | 5 | |
| 14 Aug. | Patchy rain possible | 25° /14° | 1.4 mm | 6 | |
| 15 Aug. | Patchy rain possible | 25° /14° | 0.7 mm | 6 | |
| 16 Aug. | Moderate or heavy rain shower | 27° /16° | 4.9 mm | 6 | |
| 17 Aug. | Cloudy | 25° /17° | 6.9 mm | 6 | |
| 18 Aug. | Moderate or heavy rain shower | 23° /16° | 27.1 mm | 5 | |
| 19 Aug. | Patchy rain possible | 18° /11° | 5.7 mm | 4 | |
| 20 Aug. | Overcast | 21° /10° | 1.3 mm | 5 | |
| 21 Aug. | Moderate rain at times | 18° /13° | 5.2 mm | 4 | |
| 22 Aug. | Patchy rain possible | 21° /10° | 0.2 mm | 5 | |
| 23 Aug. | Patchy rain possible | 24° /11° | 0.1 mm | 6 | |
| 24 Aug. | Patchy rain possible | 24° /13° | 1.1 mm | 5 | |
| 25 Aug. | Fog | 22° /14° | 4.7 mm | 5 | |
| 26 Aug. | Light rain shower | 22° /14° | 4 mm | 5 | |
| 27 Aug. | Fog | 24° /12° | 0.1 mm | 6 | |
| 28 Aug. | Mist | 22° /12° | 0.8 mm | 5 | |
| 29 Aug. | Light rain shower | 23° /10° | 0.3 mm | 6 | |
| 30 Aug. | Light rain shower | 21° /11° | 2 mm | 5 | |
| 31 Aug. | Partly cloudy | 21° /12° | 2.1 mm | 6 | |
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Important Notice
Our weather forecast for Cornwall in August 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 August - FAQ
What are the expected maximum and minimum temperatures in Cornwall during August?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cornwall during August?
Significant rainfall exceeding 227.7 mm is expected in Cornwall during August, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cornwall during August?
The average wind speed in Cornwall during August is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
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