Current Conditions

Walnut, California

74°F23°C

Clear

Wind

SW 3 mph5 km/h

Humidity

56%

Cloud Cover

19%

As of Tuesday, September 22, 2026 at 12:26 PM PDT

Today's Outlook

Day

Mostly clear and warm, with a high of 81°F27°C and morning low of 74°F23°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h.

Night

Mostly clear, with a low around 67°F20°C. Light wind from the SW around 2 mph4 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 81°F27°C	Low 67°F20°C	Precip 0 in0 mm—	Cloud 5%	Wind SW 5 mph7 km/h	Tuesday: Mostly clear and warm, with a high of 81°F27°C and morning low of 74°F23°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. Tuesday Night: Mostly clear, with a low around 67°F20°C. Light wind from the SW around 2 mph4 km/h.
Clear	High 87°F31°C	Low 63°F17°C	Precip 0 in0 mm—	Cloud 4%	Wind SW 3 mph5 km/h	Wednesday: Mostly clear and hot, with a high of 87°F31°C and morning low of 68°F20°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. Wednesday Night: Mostly clear, with a low around 63°F17°C. Light wind from the SE around 2 mph3 km/h.
Clear	High 85°F30°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 11%	Wind SW 3 mph5 km/h	Thursday: Mostly clear and warm, with a high of 85°F30°C and morning low of 69°F21°C. Breezy from the SW at 5 to 7 mph7 to 11 km/h. Thursday Night: Mostly clear, with a low around 66°F19°C. Light wind from the WSW around 2 mph3 km/h.
Partly Cloudy	High 89°F31°C	Low 66°F19°C	Precip 0 in0 mm—	Cloud 41%	Wind WSW 3 mph5 km/h	Friday: Partly cloudy and hot, with a high of 89°F31°C and morning low of 70°F21°C. Light wind from the SW around 4 mph7 km/h. Friday Night: Partly cloudy, with a low around 66°F19°C. Light wind from the NW around 2 mph3 km/h.
Partly Cloudy	High 89°F32°C	Low 67°F19°C	Precip 0 in0 mm—	Cloud 66%	Wind SSW 3 mph5 km/h	Saturday: Mostly cloudy and hot, with a high of 89°F32°C and morning low of 70°F21°C. Light wind from the SSW around 4 mph7 km/h. Saturday Night: Mostly cloudy, with a low around 67°F19°C. Light wind from the SE around 2 mph3 km/h.
Drizzle	High 81°F27°C	Low 68°F20°C	Precip 0.06 in1.5 mm17%	Cloud 66%	Wind SSW 3 mph5 km/h	Sunday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 70°F21°C. Light wind from the SSW around 4 mph7 km/h. 17% chance of drizzle throughout the day. Sunday Night: Mostly cloudy, with a low around 68°F20°C. Light wind from the WNW around 2 mph3 km/h. 12% chance of drizzle in the evening.
Drizzle	High 81°F27°C	Low 65°F19°C	Precip 0.11 in2.9 mm19%	Cloud 40%	Wind SW 3 mph5 km/h	Monday: Partly cloudy and warm, with a high of 81°F27°C and morning low of 68°F20°C. Light wind from the SW around 4 mph7 km/h. 19% chance of drizzle throughout the day. Monday Night: Partly cloudy, with a low around 65°F19°C. Light wind from the NNE around 2 mph3 km/h. 14% chance of drizzle throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 22	81°F27°C	67°F20°C	0 in0 mm· —	5%	Clear	SW 5 mph7 km/h
DayMostly clear and warm, with a high of 81°F27°C and morning low of 74°F23°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. NightMostly clear, with a low around 67°F20°C. Light wind from the SW around 2 mph4 km/h.
	WednesdaySep 23	87°F31°C	63°F17°C	0 in0 mm· —	4%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 68°F20°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 63°F17°C. Light wind from the SE around 2 mph3 km/h.
	ThursdaySep 24	85°F30°C	66°F19°C	0 in0 mm· —	11%	Clear	SW 3 mph5 km/h
DayMostly clear and warm, with a high of 85°F30°C and morning low of 69°F21°C. Breezy from the SW at 5 to 7 mph7 to 11 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the WSW around 2 mph3 km/h.
	FridaySep 25	89°F31°C	66°F19°C	0 in0 mm· —	41%	Partly Cloudy	WSW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 89°F31°C and morning low of 70°F21°C. Light wind from the SW around 4 mph7 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the NW around 2 mph3 km/h.
	SaturdaySep 26	89°F32°C	67°F19°C	0 in0 mm· —	66%	Partly Cloudy	SSW 3 mph5 km/h
DayMostly cloudy and hot, with a high of 89°F32°C and morning low of 70°F21°C. Light wind from the SSW around 4 mph7 km/h. NightMostly cloudy, with a low around 67°F19°C. Light wind from the SE around 2 mph3 km/h.
	SundaySep 27	81°F27°C	68°F20°C	0.06 in1.5 mm· 17%	66%	Drizzle	SSW 3 mph5 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 70°F21°C. Light wind from the SSW around 4 mph7 km/h. 17% chance of drizzle throughout the day. NightMostly cloudy, with a low around 68°F20°C. Light wind from the WNW around 2 mph3 km/h. 12% chance of drizzle in the evening.
	MondaySep 28	81°F27°C	65°F19°C	0.11 in2.9 mm· 19%	40%	Drizzle	SW 3 mph5 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 68°F20°C. Light wind from the SW around 4 mph7 km/h. 19% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F19°C. Light wind from the NNE around 2 mph3 km/h. 14% chance of drizzle throughout the night.
	TuesdaySep 29	85°F30°C	64°F18°C	0.09 in2.3 mm· 14%	25%	Drizzle	SW 3 mph5 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 68°F20°C. Light wind from the SW around 4 mph7 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 64°F18°C. Light wind from the NNE around 2 mph4 km/h. 14% chance of drizzle throughout the night.
	WednesdaySep 30	86°F30°C	65°F19°C	0.1 in2.5 mm· 13%	30%	Drizzle	SW 3 mph6 km/h
DayPartly cloudy and warm, with a high of 86°F30°C and morning low of 68°F20°C. Light wind from the SW around 4 mph7 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 65°F19°C. Light wind from the NE around 2 mph4 km/h. 12% chance of drizzle throughout the night.
	ThursdayOct 1	85°F30°C	66°F19°C	0.04 in1.1 mm· 11%	28%	Drizzle	SW 3 mph5 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 69°F21°C. Light wind from the SW around 4 mph7 km/h. NightPartly cloudy, with a low around 66°F19°C. Light wind from the ENE around 2 mph4 km/h. 11% chance of drizzle overnight.
	FridayOct 2	86°F30°C	66°F19°C	0.01 in0.3 mm· 4%	23%	Clear	SSW 3 mph5 km/h
DayMostly clear and hot, with a high of 86°F30°C and morning low of 69°F20°C. Light wind from the SW around 5 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the ENE around 2 mph4 km/h.
	SaturdayOct 3	87°F31°C	66°F19°C	0.01 in0.3 mm· 4%	19%	Clear	SW 4 mph6 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 70°F21°C. Light wind from the SW around 5 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the NE around 2 mph4 km/h.
	SundayOct 4	86°F30°C	66°F19°C	0.03 in0.7 mm· 5%	23%	Clear	SW 3 mph6 km/h
DayMostly clear and hot, with a high of 86°F30°C and morning low of 69°F21°C. Light wind from the SW around 4 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the NE around 2 mph4 km/h.
	MondayOct 5	87°F30°C	66°F19°C	0.03 in0.8 mm· 7%	21%	Clear	SW 3 mph6 km/h
DayMostly clear and hot, with a high of 87°F30°C and morning low of 69°F21°C. Light wind from the SW around 4 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the NNE around 3 mph4 km/h.
	TuesdayOct 6	88°F31°C	66°F19°C	0.02 in0.6 mm· 7%	21%	Clear	WSW 4 mph6 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 69°F21°C. Light wind from the SW around 4 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the NNE around 3 mph4 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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Coordinates: 34.0203°N, 117.8653°W·Elevation: 171m·Timezone: America/Los_Angeles·Population: 30,237