Current Conditions

Diamond Bar, California

68°F20°C

Cloudy

Wind

SW 2 mph4 km/h

Humidity

79%

Cloud Cover

91%

As of Thursday, August 13, 2026 at 3:01 AM PDT

Today's Outlook

Day

Overcast and warm, with a high of 81°F27°C and morning low of 69°F20°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h.

Night

Mostly cloudy, with a low around 67°F19°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)
Cloudy	High 81°F27°C	Low 67°F19°C	Precip 0 in0 mm—	Cloud 83%	Wind SSW 4 mph7 km/h	Thursday: Overcast and warm, with a high of 81°F27°C and morning low of 69°F20°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h. Thursday Night: Mostly cloudy, with a low around 67°F19°C. Light wind from the SW around 3 mph5 km/h.
Clear	High 83°F28°C	Low 66°F19°C	Precip 0 in0.1 mm1%	Cloud 17%	Wind SW 4 mph6 km/h	Friday: Mostly clear and warm, with a high of 83°F28°C and morning low of 69°F20°C. Breezy from the SW at 5 to 8 mph9 to 13 km/h. Friday Night: Mostly clear, with a low around 66°F19°C. Light wind from the SW around 3 mph4 km/h.
Clear	High 84°F29°C	Low 65°F18°C	Precip 0 in0 mm—	Cloud 11%	Wind SW 3 mph5 km/h	Saturday: Mostly clear and warm, with a high of 84°F29°C and morning low of 69°F21°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. Saturday Night: Mostly clear, with a low around 65°F18°C. Light wind from the SW around 2 mph3 km/h.
Clear	High 88°F31°C	Low 65°F19°C	Precip 0 in0 mm—	Cloud 25%	Wind SW 3 mph5 km/h	Sunday: Mostly clear and hot, with a high of 88°F31°C and morning low of 71°F21°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. Sunday Night: Partly cloudy, with a low around 65°F19°C. Light wind from the WSW around 2 mph3 km/h.
Clear	High 89°F32°C	Low 67°F20°C	Precip 0 in0 mm—	Cloud 32%	Wind SW 3 mph6 km/h	Monday: Partly cloudy and hot, with a high of 89°F32°C and morning low of 72°F22°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. Monday Night: Partly cloudy, with a low around 67°F20°C. Light wind from the SW around 2 mph3 km/h.
Clear	High 90°F32°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 22%	Wind SW 3 mph5 km/h	Tuesday: Mostly clear and hot, with a high of 90°F32°C and morning low of 73°F23°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. Tuesday Night: Mostly clear, with a low around 68°F20°C. Light wind from the SSW around 2 mph3 km/h.
Clear	High 90°F32°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 15%	Wind SW 3 mph6 km/h	Wednesday: Mostly clear and hot, with a high of 90°F32°C and morning low of 74°F23°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. Wednesday Night: Mostly clear, with a low around 68°F20°C. Light wind from the SSW around 2 mph3 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdayAug 13	81°F27°C	67°F19°C	0 in0 mm· —	83%	Cloudy	SSW 4 mph7 km/h
DayOvercast and warm, with a high of 81°F27°C and morning low of 69°F20°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h. NightMostly cloudy, with a low around 67°F19°C. Light wind from the SW around 3 mph5 km/h.
	FridayAug 14	83°F28°C	66°F19°C	0 in0.1 mm· 1%	17%	Clear	SW 4 mph6 km/h
DayMostly clear and warm, with a high of 83°F28°C and morning low of 69°F20°C. Breezy from the SW at 5 to 8 mph9 to 13 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the SW around 3 mph4 km/h.
	SaturdayAug 15	84°F29°C	65°F18°C	0 in0 mm· —	11%	Clear	SW 3 mph5 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 69°F21°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 65°F18°C. Light wind from the SW around 2 mph3 km/h.
	SundayAug 16	88°F31°C	65°F19°C	0 in0 mm· —	25%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 71°F21°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. NightPartly cloudy, with a low around 65°F19°C. Light wind from the WSW around 2 mph3 km/h.
	MondayAug 17	89°F32°C	67°F20°C	0 in0 mm· —	32%	Clear	SW 3 mph6 km/h
DayPartly cloudy and hot, with a high of 89°F32°C and morning low of 72°F22°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. NightPartly cloudy, with a low around 67°F20°C. Light wind from the SW around 2 mph3 km/h.
	TuesdayAug 18	90°F32°C	68°F20°C	0 in0 mm· —	22%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 90°F32°C and morning low of 73°F23°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SSW around 2 mph3 km/h.
	WednesdayAug 19	90°F32°C	68°F20°C	0 in0 mm· —	15%	Clear	SW 3 mph6 km/h
DayMostly clear and hot, with a high of 90°F32°C and morning low of 74°F23°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SSW around 2 mph3 km/h.
	ThursdayAug 20	90°F32°C	68°F20°C	0 in0 mm· —	18%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 90°F32°C and morning low of 73°F23°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SSW around 2 mph3 km/h.
	FridayAug 21	91°F33°C	68°F20°C	0 in0 mm· —	19%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 74°F23°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SW around 2 mph3 km/h.
	SaturdayAug 22	91°F33°C	69°F20°C	0 in0 mm· —	18%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 76°F24°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. NightMostly clear, with a low around 69°F20°C. Light wind from the SW around 2 mph3 km/h.
	SundayAug 23	91°F33°C	69°F20°C	0 in0 mm· —	13%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 74°F23°C. Breezy from the SW at 5 to 7 mph8 to 12 km/h. NightMostly clear, with a low around 69°F20°C. Light wind from the SW around 2 mph3 km/h.
	MondayAug 24	91°F33°C	68°F20°C	0 in0.1 mm· 3%	13%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 74°F23°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SW around 2 mph3 km/h.
	TuesdayAug 25	91°F33°C	68°F20°C	0.02 in0.4 mm· 6%	15%	Clear	SW 3 mph5 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 73°F23°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SSW around 2 mph3 km/h.
	WednesdayAug 26	91°F33°C	68°F20°C	0.01 in0.2 mm· 5%	26%	Clear	SW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 74°F24°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightPartly cloudy, with a low around 68°F20°C. Light wind from the SW around 2 mph3 km/h.
	ThursdayAug 27	91°F33°C	69°F21°C	0.03 in0.7 mm· 8%	33%	Clear	SW 3 mph5 km/h
DayPartly cloudy and hot, with a high of 91°F33°C and morning low of 74°F23°C. Breezy from the SW at 5 to 7 mph8 to 11 km/h. NightPartly cloudy, with a low around 69°F21°C. Light wind from the SSW around 2 mph3 km/h.

Nearby Cities

Walnut3 mi5 km Pomona4 mi6 km Chino Hills4 mi6 km San Dimas5 mi9 km South San Jose Hills6 mi9 km La Verne6 mi9 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: 34.0286°N, 117.8103°W·Elevation: 212m·Timezone: America/Los_Angeles·Population: 56,897