Average annual temperature is 12.8 °C
Absolute maximum temperature: 34.1 °C
Absolute minimum temperature: 2.4 °C
Number of sunny days: 221 days
Number of rainy days: 144 days
Look at detailed online map of Half Moon Bay
* Weather data for Half Moon Bay United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 17.9 | 18.8 | 18.0 | 21.2 | 22.0 | 19.3 | 23.5 | 27.8 | 21.4 | 34.1 | 25.5 | 20.6 |
| Average daytime temperature (°C) | 13.6 | 13.2 | 12.3 | 14.2 | 15.3 | 16.6 | 19.0 | 20.4 | 19.4 | 21.9 | 18.2 | 15.8 |
| Average temperature (°C) | 10.6 | 8.9 | 9.3 | 10.6 | 12.2 | 13.4 | 14.7 | 16.2 | 15.8 | 16.1 | 13.5 | 12.1 |
| Average night temperature (°C) | 8.4 | 5.7 | 7.0 | 7.9 | 10.1 | 11.4 | 11.8 | 13.5 | 13.4 | 12.4 | 10.3 | 9.5 |
| Absolute minimum temperature (°C) | 4.1 | 2.4 | 3.5 | 4.6 | 6.2 | 9.7 | 10.3 | 12.0 | 11.4 | 7.8 | 6.5 | 6.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.5 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.3 | 7.8 | 8.0 | 10.9 | 10.2 | 11.6 | 11.9 | 10.7 | 10.2 | 9.3 | 7.9 | 6.0 |
| Precipitation (mm) | 300 | 126 | 274 | 11 | 56 | 3 | 1 | 6 | 7 | 13 | 78 | 166 |
| Sunny days | 11 | 13 | 8 | 23 | 16 | 22 | 27 | 20 | 25 | 22 | 19 | 15 |
| Rainy days | 20 | 15 | 23 | 7 | 15 | 8 | 4 | 11 | 5 | 9 | 11 | 16 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Half Moon Bay during the most sunny months:
The largest precipitation sum in Half Moon Bay is at