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Weather in Cornwall for August 2025

Your guide to Cornwall weather in August - trends and predictions

    Temperatures

  • In general, the average temperature in Cornwall at the beginning of August is 18 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 17 °C by the end of August.

  • Rain 🌧️

  • Cornwall in August brings notable rainfall, with an average of 16 rainy days and a total precipitation of 49.1 mm.

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Average dry days
15
Dry days
Average rainy days
16
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/14°
Temperatures
Average wind speed
26 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Cornwall Weather August

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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. Partly cloudy
Partly cloudy
18° /15° 0 mm 5
2 Aug. Patchy rain possible
Patchy rain possible
19° /15° 0.6 mm 4
3 Aug. Patchy rain possible
Patchy rain possible
17° /14° 0.7 mm 4
4 Aug. Patchy rain possible
Patchy rain possible
18° /13° 0 mm 4
5 Aug. Patchy rain possible
Patchy rain possible
20° /15° 1.3 mm 5
6 Aug. Patchy rain possible
Patchy rain possible
17° /14° 3.1 mm 4
7 Aug. Patchy light drizzle
Patchy light drizzle
17° /14° 0.9 mm 4
8 Aug. Light rain shower
Light rain shower
18° /13° 2.2 mm 4
9 Aug. Patchy rain possible
Patchy rain possible
18° /15° 0.4 mm 4
10 Aug. Patchy rain possible
Patchy rain possible
19° /15° 0.6 mm 4
11 Aug. Partly cloudy
Partly cloudy
22° /16° 2.1 mm 6
12 Aug. Patchy rain possible
Patchy rain possible
19° /14° 1.1 mm 4
13 Aug. Light drizzle
Light drizzle
18° /14° 1 mm 4
14 Aug. Patchy rain possible
Patchy rain possible
17° /15° 0.1 mm 4
15 Aug. Light drizzle
Light drizzle
20° /15° 1.7 mm 5
16 Aug. Sunny
Sunny
18° /14° 0 mm 5
17 Aug. Patchy rain possible
Patchy rain possible
16° /13° 0.3 mm 4
18 Aug. Patchy rain possible
Patchy rain possible
17° /14° 0.2 mm 4
19 Aug. Light rain shower
Light rain shower
18° /15° 4.3 mm 4
20 Aug. Patchy rain possible
Patchy rain possible
16° /14° 1 mm 4
21 Aug. Patchy rain possible
Patchy rain possible
18° /14° 0.4 mm 4
22 Aug. Cloudy
Cloudy
18° /14° 0.7 mm 4
23 Aug. Partly cloudy
Partly cloudy
19° /14° 1.9 mm 5
24 Aug. Cloudy
Cloudy
16° /13° 8.9 mm 4
25 Aug. Patchy rain possible
Patchy rain possible
17° /13° 2.3 mm 4
26 Aug. Light rain shower
Light rain shower
17° /13° 1.2 mm 4
27 Aug. Light rain shower
Light rain shower
17° /14° 2.7 mm 4
28 Aug. Patchy rain possible
Patchy rain possible
17° /14° 0.5 mm 4
29 Aug. Patchy rain possible
Patchy rain possible
17° /13° 0.1 mm 5
30 Aug. Light rain shower
Light rain shower
16° /13° 0.2 mm 5
31 Aug. Light rain shower
Light rain shower
18° /14° 8.6 mm 4
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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 18° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cornwall during August?
In August, Cornwall can expect light to moderate rainfall, totaling 49.1 mm across approximately 16 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Cornwall during August?
The average wind speed in Cornwall during August is 26 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Cornwall

Explore the daily rainfall trends and prepare for Cornwalls August weather 💧

UV exposure in Cornwall during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Location coordinates Where is Cornwall?

Get accurate weather forecasts for Cornwall, located at latitude 50.416 and longitude -5.073. Stay updated with localized weather information tailored for Cornwall.

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