Current Conditions

Walnut, California

83°F28°C

Drizzle

Wind

NW 4 mph6 km/h

Humidity

57%

Cloud Cover

15%

As of Tuesday, September 8, 2026 at 7:06 PM PDT

Today's Outlook

Night

Partly cloudy, with a low around 75°F24°C. Light wind from the NNE around 3 mph4 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 100°F38°C	Low 75°F24°C	Precip 0.01 in0.3 mm25%	Cloud 24%	Wind WNW 3 mph5 km/h	Wednesday: Mostly clear and hot, with a high of 100°F38°C and morning low of 80°F27°C. Light wind from the W around 4 mph6 km/h. 25% chance of drizzle in the afternoon. Heat risk in the afternoon. Wednesday Night: Partly cloudy, with a low around 75°F24°C. Light wind from the NNE around 3 mph4 km/h.
Hot	High 93°F34°C	Low 76°F24°C	Precip 0 in0.1 mm5%	Cloud 17%	Wind SSW 3 mph6 km/h	Thursday: Mostly clear and hot, with a high of 93°F34°C and morning low of 80°F27°C. Light wind from the SSW around 5 mph8 km/h. Heat risk in the afternoon. Thursday Night: Mostly clear, with a low around 76°F24°C. Light wind from the SE around 2 mph4 km/h.
Clear	High 88°F31°C	Low 73°F23°C	Precip 0 in0 mm—	Cloud 4%	Wind SSW 3 mph5 km/h	Friday: Mostly clear and hot, with a high of 88°F31°C and morning low of 77°F25°C. Light wind from the SSW around 5 mph8 km/h. Humid. Friday Night: Mostly clear, with a low around 73°F23°C. Light wind from the S around 2 mph3 km/h.
Clear	High 85°F29°C	Low 70°F21°C	Precip 0 in0 mm—	Cloud 11%	Wind SSW 3 mph5 km/h	Saturday: Mostly clear and warm, with a high of 85°F29°C and morning low of 73°F23°C. Light wind from the SSW around 5 mph7 km/h. Saturday Night: Mostly clear, with a low around 70°F21°C. Light wind from the SSW around 2 mph3 km/h.
Clear	High 85°F29°C	Low 67°F20°C	Precip 0 in0 mm—	Cloud 13%	Wind SSW 3 mph5 km/h	Sunday: Mostly clear and warm, with a high of 85°F29°C and morning low of 71°F22°C. Light wind from the SW around 4 mph7 km/h. Sunday Night: Mostly clear, with a low around 67°F20°C. Light wind from the S around 2 mph3 km/h.
Clear	High 85°F29°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 9%	Wind SSW 3 mph5 km/h	Monday: Mostly clear and warm, with a high of 85°F29°C and morning low of 71°F21°C. Light wind from the SSW around 5 mph7 km/h. Monday Night: Mostly clear, with a low around 66°F19°C. Light wind from the S around 2 mph3 km/h.
Clear	High 83°F28°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 16%	Wind SSW 3 mph5 km/h	Tuesday: Mostly clear and warm, with a high of 83°F28°C and morning low of 70°F21°C. Light wind from the SSW around 4 mph7 km/h. Tuesday Night: Mostly clear, with a low around 66°F19°C. Light wind from the SSW around 2 mph3 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 9	100°F38°C	75°F24°C	0.01 in0.3 mm· 25%	24%	Drizzle	WNW 3 mph5 km/h
DayMostly clear and hot, with a high of 100°F38°C and morning low of 80°F27°C. Light wind from the W around 4 mph6 km/h. 25% chance of drizzle in the afternoon. Heat risk in the afternoon. NightPartly cloudy, with a low around 75°F24°C. Light wind from the NNE around 3 mph4 km/h.
	ThursdaySep 10	93°F34°C	76°F24°C	0 in0.1 mm· 5%	17%	Hot	SSW 3 mph6 km/h
DayMostly clear and hot, with a high of 93°F34°C and morning low of 80°F27°C. Light wind from the SSW around 5 mph8 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 76°F24°C. Light wind from the SE around 2 mph4 km/h.
	FridaySep 11	88°F31°C	73°F23°C	0 in0 mm· —	4%	Clear	SSW 3 mph5 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 77°F25°C. Light wind from the SSW around 5 mph8 km/h. Humid. NightMostly clear, with a low around 73°F23°C. Light wind from the S around 2 mph3 km/h.
	SaturdaySep 12	85°F29°C	70°F21°C	0 in0 mm· —	11%	Clear	SSW 3 mph5 km/h
DayMostly clear and warm, with a high of 85°F29°C and morning low of 73°F23°C. Light wind from the SSW around 5 mph7 km/h. NightMostly clear, with a low around 70°F21°C. Light wind from the SSW around 2 mph3 km/h.
	SundaySep 13	85°F29°C	67°F20°C	0 in0 mm· —	13%	Clear	SSW 3 mph5 km/h
DayMostly clear and warm, with a high of 85°F29°C and morning low of 71°F22°C. Light wind from the SW around 4 mph7 km/h. NightMostly clear, with a low around 67°F20°C. Light wind from the S around 2 mph3 km/h.
	MondaySep 14	85°F29°C	66°F19°C	0 in0 mm· —	9%	Clear	SSW 3 mph5 km/h
DayMostly clear and warm, with a high of 85°F29°C and morning low of 71°F21°C. Light wind from the SSW around 5 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the S around 2 mph3 km/h.
	TuesdaySep 15	83°F28°C	66°F19°C	0 in0 mm· —	16%	Clear	SSW 3 mph5 km/h
DayMostly clear and warm, with a high of 83°F28°C and morning low of 70°F21°C. Light wind from the SSW around 4 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the SSW around 2 mph3 km/h.
	WednesdaySep 16	83°F28°C	65°F18°C	0 in0 mm· —	18%	Clear	SW 3 mph5 km/h
DayMostly clear and warm, with a high of 83°F28°C and morning low of 69°F20°C. Light wind from the SSW around 4 mph7 km/h. NightMostly clear, with a low around 65°F18°C. Light wind from the SW around 2 mph3 km/h.
	ThursdaySep 17	85°F29°C	65°F19°C	0 in0.1 mm· 3%	22%	Clear	SW 3 mph5 km/h
DayMostly clear and warm, with a high of 85°F29°C and morning low of 70°F21°C. Light wind from the SW around 4 mph7 km/h. NightMostly clear, with a low around 65°F19°C. Light wind from the SW around 2 mph3 km/h.
	FridaySep 18	87°F31°C	66°F19°C	0 in0.1 mm· 2%	26%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 70°F21°C. Breezy from the SW at 4 to 7 mph7 to 11 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the SW around 2 mph3 km/h.
	SaturdaySep 19	87°F31°C	67°F20°C	0 in0 mm· —	29%	Clear	SW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 87°F31°C and morning low of 71°F21°C. Light wind from the SW around 5 mph7 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the S around 2 mph3 km/h.
	SundaySep 20	86°F30°C	67°F19°C	0 in0.1 mm· 2%	28%	Clear	SSW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 86°F30°C and morning low of 71°F21°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightPartly cloudy, with a low around 67°F19°C. Light wind from the S around 2 mph3 km/h.
	MondaySep 21	85°F29°C	66°F19°C	0 in0.1 mm· 3%	26%	Clear	SW 3 mph6 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 69°F21°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the SSW around 2 mph3 km/h.
	TuesdaySep 22	84°F29°C	65°F19°C	0.02 in0.4 mm· 7%	28%	Clear	SW 3 mph5 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 69°F21°C. Light wind from the SW around 5 mph7 km/h. NightPartly cloudy, with a low around 65°F19°C. Light wind from the SSW around 2 mph3 km/h.
	WednesdaySep 23	84°F29°C	65°F18°C	0.02 in0.4 mm· 6%	29%	Clear	SSW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 84°F29°C and morning low of 68°F20°C. Light wind from the SW around 5 mph7 km/h. NightPartly cloudy, with a low around 65°F18°C. Light wind from the E around 2 mph3 km/h.

Nearby Cities

South San Jose Hills2 mi4 km Diamond Bar3 mi5 km Rowland Heights4 mi6 km Valinda5 mi8 km La Puente5 mi8 km Covina5 mi8 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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Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

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Coordinates: 34.0203°N, 117.8653°W·Elevation: 171m·Timezone: America/Los_Angeles·Population: 30,237