Half Moon Bay Rainfall Forecast

Today 9 Sep
50%< 1mm
Wed 10 Sep
55%< 1mm
Thu 11 Sep
70%< 2mm
Fri 12 Sep
55%< 2mm
Sat 13 Sep
30%< 1mm
Sun 14 Sep
15%< 1mm
Mon 15 Sep
55%< 2mm

Half Moon Bay Rainfall Statistics View More

September Rainfall

Avalon Airport (23km)

Total Rainfall 2025
297.6mm
Daily Average 2025
1.2mm
Wettest Day 3 February, 2025
52.2mm
Wet Days 2025
87/252 (35%)
Total Rainfall August
34.6mm
Daily Average August
1.1mm
Wettest Day 30 August, 2025
16.8mm
Wet Days August
16/31 (52%)
Total Rainfall September
14.4mm
Daily Average September
1.8mm
Wettest Day 8 September, 2025
9mm
Wet Days September
5/9 (56%)

Climate (2010–Present)

Avalon Airport (23km)

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Annual Average 2020–2024
483.5mm
Monthly Average 2020–2025
39.1mm
Daily Average 2020–2025
1.3mm
Wettest Day 23 November, 2020
54mm

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