Half Moon Bay, CA Weather & Climate Normals
Half Moon Bay's real weather, in one number
Half Moon Bay, CA scores 62/100 on this site's reading of NOAA's own 30-year normals: mild with real seasons. A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Half Moon Bay's hottest and coldest months
Half Moon Bay's hottest month is Aug, averaging 60°F; its coldest is Dec, averaging 51°F, an 8.8°F swing across the year, one of the smaller gaps in this dataset.
Half Moon Bay's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 59°F | 43°F | 5.07in | 0in |
| Feb | 60°F | 43°F | 4.73in | 0in |
| Mar | 60°F | 44°F | 3.67in | 0in |
| Apr | 61°F | 45°F | 1.81in | 0in |
| May | 62°F | 48°F | 0.96in | 0in |
| Jun | 64°F | 50°F | 0.36in | 0in |
| Jul | 65°F | 53°F | 0.14in | 0in |
| Aug | 66°F | 54°F | 0.23in | 0in |
| Sep | 66°F | 51°F | 0.21in | 0in |
| Oct | 66°F | 48°F | 1.26in | 0in |
| Nov | 63°F | 45°F | 2.43in | 0in |
| Dec | 59°F | 43°F | 5.17in | 0in |
Jun, Jul, Aug, Sep, and Oct are the best time to see Half Moon Bay at its mildest; the rest of the year, plan around Dec's cold.
Rain and snow in Half Moon Bay
Half Moon Bay averages 26.04in of precipitation a year across roughly 116 days with measurable rain or snow, and 0in of snow a year.
Where Half Moon Bay ranks
Half Moon Bay ranks 440 of 4876 US cities in this dataset for comfort score, and 289 of 429 within CA. About 11,324 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Half Moon Bay, CA US, 0.4 miles from Half Moon Bay, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure