Cornwall Rainfall Forecast

Today 5 Aug
50%< 1mm
Thu 6 Aug
55%< 2mm
Fri 7 Aug
10%< 1mm
Sat 8 Aug
40%< 1mm
Sun 9 Aug
95%10–15mm
Mon 10 Aug
70%1–5mm
Tue 11 Aug
70%1–5mm

Cornwall Rainfall Statistics View More

August Rainfall

St Helens Aerodrome (27km)

Total Rainfall 2026
355.4mm
Daily Average 2026
1.6mm
Wettest Day 28 May, 2026
66.4mm
Wet Days 2026
97/217 (45%)
Total Rainfall July
36.4mm
Daily Average July
1.2mm
Wettest Day 3 July, 2026
9.2mm
Wet Days July
13/31 (42%)
Total Rainfall August
0.8mm
Daily Average August
0.2mm
Wettest Day 4 August, 2026
0.4mm
Wet Days August
3/5 (60%)

Climate (2021–2025)

St Helens Aerodrome (27km)

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Annual Average 2021–2025
767.4mm
Monthly Average 2021–2026
61.6mm
Daily Average 2021–2026
2mm
Wettest Day 1 December, 2024
99.2mm

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