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Weather in Half Moon Bay, CA · National Weather Service + NOAA

It hardly ever freezes in Half Moon Bay

Half Moon Bay has warm winters and cool summers. A typical July afternoon reaches 67°, a January night drops to 45°, and snow is almost unheard of. In November, a normal day reaches 62° and a normal night drops to 48°.

Winter 58°/45°Spring 62°/48°Summer 67°/54°Fall 66°/51°
Right now
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Sunrise 6:37 am · sunset 5:09 pm

Getting the latest forecast from the National Weather Service…

What stands out about Half Moon Bay’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
It hardly ever freezesOnly 82% of years see a night at 32° or below.Cool summersJuly afternoons average 67°, cooler than 99% of U.S. towns.Milder winters than most of CaliforniaJanuary nights average 45°, milder than 1,425 of 1,618 California towns.Snow is rareNo measurable snow in a normal year.
A normal year

Where today sits in Half Moon Bay’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
58° / 45°
Snow is rare
Spring
62° / 48°
Frost is rare by spring
Summer
67° / 54°
90° days are rare
Fall now
66° / 51°
Mild well into the fall
Best months to be outside
MayJunJulAugSepOct
Highs of 62–84° and lows of 40° or more
How much snow does Half Moon Bay get?Almost none.When is it wettest?December, with 5.0 inches.Is it warmer than it used to be?+1.7° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Half Moon Bay.

Town Square →
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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Half Moon Bay itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Half Moon Bay, CA (1 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.