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Weather in Alum Rock, CA · National Weather Service + NOAA

Snow is rare in Alum Rock

Alum Rock has mild winters and warm summers, with very little rain. A typical July afternoon reaches 86°, a January night drops to 39°, and snow is almost unheard of. A typical November afternoon reaches 67°, and nights fall to 43°.

Winter 60°/40°Spring 72°/46°Summer 85°/55°Fall 76°/49°
Right now
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Loading conditions…
Sunrise 9:34 am · sunset 8:07 pm

Getting the latest forecast from the National Weather Service…

What stands out about Alum Rock’s weather

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

Climate →
Snow is rareNo measurable snow in a normal year.Warming faster than mostThe last 30 years averaged 1.9° warmer than the 1900s, a bigger shift than 91% of U.S. towns.A dry climateJust 15 inches of rain and melted snow a year, less than 94% of U.S. towns.
A normal year

Where today sits in Alum Rock’s year

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

Full climate →
Winter
60° / 40°
Snow is rare
Spring
72° / 46°
Last frost around Feb 2
Summer
85° / 55°
27 days reach 90° in a normal year
Fall now
76° / 49°
First frost around Dec 6
33 daysuntil the usual first frost (Dec 6)
Best months to be outside
FebMarAprMayJunSepOctNov
Highs of 62–84° and lows of 40° or more
How much snow does Alum Rock get?Almost none.When is it wettest?February, with 2.9 inches.Is it warmer than it used to be?+1.9° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Alum Rock.

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 Alum Rock itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Los Gatos, CA (12 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.