Cornwall Rainfall Forecast

Today 26 Aug
100%10–25mm
Wed 27 Aug
65%1–5mm
Thu 28 Aug
45%< 1mm
Fri 29 Aug
80%5–10mm
Sat 30 Aug
50%< 2mm
Sun 31 Aug
20%< 1mm
Mon 1 Sep
25%< 1mm

Cornwall Rainfall Statistics View More

August Rainfall

St Helens Aerodrome (27km)

Total Rainfall 2025
334.4mm
Daily Average 2025
1.4mm
Wettest Day 10 June, 2025
23.8mm
Wet Days 2025
112/238 (47%)
Total Rainfall July
64.8mm
Daily Average July
2.1mm
Wettest Day 27 July, 2025
21mm
Wet Days July
20/31 (65%)
Total Rainfall August
22.8mm
Daily Average August
0.9mm
Wettest Day 13 August, 2025
5.4mm
Wet Days August
15/26 (58%)

Climate (2010–Present)

St Helens Aerodrome (27km)

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Annual Average 2020–2024
840.8mm
Monthly Average 2020–2025
68.2mm
Daily Average 2020–2025
2.3mm
Wettest Day 1 December, 2024
99.2mm

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