Current Conditions

Alum Rock, California

56°F13°C

Clear

Wind

SSW 3 mph5 km/h

Humidity

89%

Cloud Cover

49%

As of Tuesday, September 22, 2026 at 12:40 AM PDT

Today's Outlook

Day

Mostly clear and warm, with a high of 74°F24°C and morning low of 57°F14°C. Light wind from the WSW around 4 mph7 km/h.

Night

Partly cloudy, with a low around 55°F13°C. Light wind from the SW around 3 mph5 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 74°F24°C	Low 55°F13°C	Precip 0 in0 mm—	Cloud 24%	Wind WSW 3 mph6 km/h	Tuesday: Mostly clear and warm, with a high of 74°F24°C and morning low of 57°F14°C. Light wind from the WSW around 4 mph7 km/h. Tuesday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the SW around 3 mph5 km/h.
Clear	High 84°F29°C	Low 56°F13°C	Precip 0 in0 mm—	Cloud 17%	Wind NW 3 mph4 km/h	Wednesday: Mostly clear and warm, with a high of 84°F29°C and morning low of 58°F15°C. Light wind from the NW around 3 mph5 km/h. Dry air. Wednesday Night: Mostly clear, with a low around 56°F13°C. Light wind from the NW around 2 mph4 km/h.
Clear	High 84°F29°C	Low 62°F17°C	Precip 0 in0 mm—	Cloud 38%	Wind SW 4 mph6 km/h	Thursday: Partly cloudy and warm, with a high of 84°F29°C and morning low of 65°F18°C. Light wind from the SW around 5 mph7 km/h. Thursday Night: Partly cloudy, with a low around 62°F17°C. Light wind from the SW around 3 mph5 km/h.
Clear	High 78°F25°C	Low 57°F14°C	Precip 0 in0 mm—	Cloud 25%	Wind WNW 4 mph7 km/h	Friday: Mostly clear and warm, with a high of 78°F25°C and morning low of 60°F15°C. Breezy from the WNW at 5 to 7 mph8 to 11 km/h. Friday Night: Partly cloudy, with a low around 57°F14°C. Light wind from the WNW around 3 mph5 km/h.
Clear	High 78°F25°C	Low 55°F13°C	Precip 0 in0 mm—	Cloud 27%	Wind WSW 3 mph5 km/h	Saturday: Partly cloudy and warm, with a high of 78°F25°C and morning low of 59°F15°C. Light wind from the WSW around 4 mph6 km/h. Dry air. Saturday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the WSW around 3 mph4 km/h.
Clear	High 74°F24°C	Low 54°F12°C	Precip 0 in0 mm—	Cloud 31%	Wind WSW 4 mph6 km/h	Sunday: Partly cloudy and warm, with a high of 74°F24°C and morning low of 56°F14°C. Light wind from the WSW around 4 mph7 km/h. Dry air. Sunday Night: Partly cloudy, with a low around 54°F12°C. Light wind from the WSW around 3 mph4 km/h.
Clear	High 77°F25°C	Low 55°F13°C	Precip 0 in0.1 mm3%	Cloud 19%	Wind W 3 mph5 km/h	Monday: Mostly clear and warm, with a high of 77°F25°C and morning low of 56°F13°C. Light wind from the WNW around 4 mph6 km/h. Dry air. Monday Night: Mostly clear, with a low around 55°F13°C. Light wind from the W around 3 mph4 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 22	74°F24°C	55°F13°C	0 in0 mm· —	24%	Clear	WSW 3 mph6 km/h
DayMostly clear and warm, with a high of 74°F24°C and morning low of 57°F14°C. Light wind from the WSW around 4 mph7 km/h. NightPartly cloudy, with a low around 55°F13°C. Light wind from the SW around 3 mph5 km/h.
	WednesdaySep 23	84°F29°C	56°F13°C	0 in0 mm· —	17%	Clear	NW 3 mph4 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 58°F15°C. Light wind from the NW around 3 mph5 km/h. Dry air. NightMostly clear, with a low around 56°F13°C. Light wind from the NW around 2 mph4 km/h.
	ThursdaySep 24	84°F29°C	62°F17°C	0 in0 mm· —	38%	Clear	SW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 65°F18°C. Light wind from the SW around 5 mph7 km/h. NightPartly cloudy, with a low around 62°F17°C. Light wind from the SW around 3 mph5 km/h.
	FridaySep 25	78°F25°C	57°F14°C	0 in0 mm· —	25%	Clear	WNW 4 mph7 km/h
DayMostly clear and warm, with a high of 78°F25°C and morning low of 60°F15°C. Breezy from the WNW at 5 to 7 mph8 to 11 km/h. NightPartly cloudy, with a low around 57°F14°C. Light wind from the WNW around 3 mph5 km/h.
	SaturdaySep 26	78°F25°C	55°F13°C	0 in0 mm· —	27%	Clear	WSW 3 mph5 km/h
DayPartly cloudy and warm, with a high of 78°F25°C and morning low of 59°F15°C. Light wind from the WSW around 4 mph6 km/h. Dry air. NightPartly cloudy, with a low around 55°F13°C. Light wind from the WSW around 3 mph4 km/h.
	SundaySep 27	74°F24°C	54°F12°C	0 in0 mm· —	31%	Clear	WSW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 74°F24°C and morning low of 56°F14°C. Light wind from the WSW around 4 mph7 km/h. Dry air. NightPartly cloudy, with a low around 54°F12°C. Light wind from the WSW around 3 mph4 km/h.
	MondaySep 28	77°F25°C	55°F13°C	0 in0.1 mm· 3%	19%	Clear	W 3 mph5 km/h
DayMostly clear and warm, with a high of 77°F25°C and morning low of 56°F13°C. Light wind from the WNW around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 55°F13°C. Light wind from the W around 3 mph4 km/h.
	TuesdaySep 29	79°F26°C	56°F13°C	0.02 in0.6 mm· 4%	17%	Clear	WNW 3 mph5 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 58°F14°C. Light wind from the WNW around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 56°F13°C. Light wind from the W around 3 mph4 km/h.
	WednesdaySep 30	80°F27°C	58°F14°C	0.03 in0.7 mm· 4%	24%	Clear	W 4 mph6 km/h
DayMostly clear and warm, with a high of 80°F27°C and morning low of 59°F15°C. Light wind from the W around 4 mph6 km/h. Dry air. NightPartly cloudy, with a low around 58°F14°C. Light wind from the W around 3 mph5 km/h.
	ThursdayOct 1	77°F25°C	58°F14°C	0.02 in0.5 mm· 5%	32%	Clear	W 4 mph6 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 59°F15°C. Light wind from the W around 5 mph8 km/h. Dry air. NightPartly cloudy, with a low around 58°F14°C. Light wind from the W around 3 mph5 km/h.
	FridayOct 2	75°F24°C	56°F13°C	0.03 in0.8 mm· 7%	23%	Clear	WNW 4 mph7 km/h
DayMostly clear and warm, with a high of 75°F24°C and morning low of 58°F14°C. Light wind from the WNW around 5 mph9 km/h. Dry air. NightMostly clear, with a low around 56°F13°C. Light wind from the WNW around 3 mph5 km/h.
	SaturdayOct 3	79°F26°C	56°F13°C	0.02 in0.6 mm· 4%	19%	Clear	NW 4 mph6 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 59°F15°C. Light wind from the NW around 5 mph7 km/h. Dry air. NightMostly clear, with a low around 56°F13°C. Light wind from the NW around 3 mph5 km/h.
	SundayOct 4	78°F25°C	57°F14°C	0.01 in0.3 mm· 4%	22%	Clear	WNW 4 mph6 km/h
DayMostly clear and warm, with a high of 78°F25°C and morning low of 58°F15°C. Light wind from the W around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 57°F14°C. Light wind from the WNW around 3 mph5 km/h.
	MondayOct 5	78°F26°C	57°F14°C	0.01 in0.3 mm· 5%	21%	Clear	WNW 4 mph6 km/h
DayMostly clear and warm, with a high of 78°F26°C and morning low of 59°F15°C. Light wind from the WNW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 57°F14°C. Light wind from the WNW around 3 mph5 km/h.
	TuesdayOct 6	79°F26°C	58°F14°C	0 in0.1 mm· 3%	17%	Clear	WNW 4 mph6 km/h
DayMostly clear and warm, with a high of 79°F26°C and morning low of 59°F15°C. Light wind from the WNW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 58°F14°C. Light wind from the NW around 3 mph5 km/h.

Nearby Cities

San Jose4 mi7 km Milpitas6 mi10 km Santa Clara7 mi11 km Campbell9 mi14 km Sunnyvale11 mi18 km Cupertino12 mi19 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 37.3661°N, 121.8272°W·Elevation: 46m·Timezone: America/Los_Angeles·Population: 15,536