Current Conditions

Altadena, California

62°F17°C

Clear

Wind

E 2 mph4 km/h

Humidity

66%

Cloud Cover

As of Thursday, September 3, 2026 at 1:23 AM PDT

Today's Outlook

Day

Mostly clear and warm, with a high of 80°F27°C and morning low of 66°F19°C. Breezy from the SSW at 6 to 8 mph9 to 12 km/h.

Night

Mostly clear, with a low around 60°F16°C. Light wind from the SE around 2 mph4 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 80°F27°C	Low 60°F16°C	Precip 0 in0 mm—	Cloud 2%	Wind S 4 mph6 km/h	Thursday: Mostly clear and warm, with a high of 80°F27°C and morning low of 66°F19°C. Breezy from the SSW at 6 to 8 mph9 to 12 km/h. Thursday Night: Mostly clear, with a low around 60°F16°C. Light wind from the SE around 2 mph4 km/h.
Clear	High 80°F27°C	Low 61°F16°C	Precip 0 in0 mm—	Cloud 6%	Wind S 4 mph6 km/h	Friday: Mostly clear and warm, with a high of 80°F27°C and morning low of 65°F19°C. Breezy from the SSW at 5 to 8 mph9 to 12 km/h. Friday Night: Mostly clear, with a low around 61°F16°C. Light wind from the SE around 2 mph4 km/h.
Clear	High 83°F29°C	Low 61°F16°C	Precip 0.01 in0.2 mm3%	Cloud 7%	Wind S 4 mph6 km/h	Saturday: Mostly clear and warm, with a high of 83°F29°C and morning low of 68°F20°C. Breezy from the S at 6 to 8 mph9 to 13 km/h. Dry air. Saturday Night: Mostly clear, with a low around 61°F16°C. Light wind from the ESE around 2 mph4 km/h.
Showers	High 83°F28°C	Low 66°F19°C	Precip 0.1 in2.5 mm24%	Cloud 19%	Wind SSW 4 mph6 km/h	Sunday: Mostly clear and warm, with a high of 83°F28°C and morning low of 69°F21°C. Breezy from the SSW at 6 to 8 mph9 to 13 km/h. 24% chance of showers throughout the day. Sunday Night: Mostly clear, with a low around 66°F19°C. Light wind from the E around 2 mph3 km/h. 24% chance of showers overnight.
Clear	High 85°F30°C	Low 63°F17°C	Precip 0.01 in0.2 mm4%	Cloud 19%	Wind SSW 4 mph6 km/h	Monday: Mostly clear and warm, with a high of 85°F30°C and morning low of 70°F21°C. Breezy from the SSW at 5 to 7 mph8 to 12 km/h. Dry air. Monday Night: Mostly clear, with a low around 63°F17°C. Light wind from the ENE around 2 mph4 km/h.
Clear	High 87°F31°C	Low 64°F18°C	Precip 0.02 in0.5 mm9%	Cloud 33%	Wind SSW 3 mph6 km/h	Tuesday: Partly cloudy and hot, with a high of 87°F31°C and morning low of 69°F21°C. Light wind from the SSW around 5 mph7 km/h. Dry air. Tuesday Night: Partly cloudy, with a low around 64°F18°C. Light wind from the NE around 2 mph4 km/h.
Drizzle	High 89°F32°C	Low 68°F20°C	Precip 0.04 in1 mm10%	Cloud 28%	Wind S 4 mph6 km/h	Wednesday: Partly cloudy and hot, with a high of 89°F32°C and morning low of 72°F22°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h. 10% chance of drizzle throughout the day. Dry air. Wednesday Night: Partly cloudy, with a low around 68°F20°C. Light wind from the ENE around 2 mph4 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdaySep 3	80°F27°C	60°F16°C	0 in0 mm· —	2%	Clear	S 4 mph6 km/h
DayMostly clear and warm, with a high of 80°F27°C and morning low of 66°F19°C. Breezy from the SSW at 6 to 8 mph9 to 12 km/h. NightMostly clear, with a low around 60°F16°C. Light wind from the SE around 2 mph4 km/h.
	FridaySep 4	80°F27°C	61°F16°C	0 in0 mm· —	6%	Clear	S 4 mph6 km/h
DayMostly clear and warm, with a high of 80°F27°C and morning low of 65°F19°C. Breezy from the SSW at 5 to 8 mph9 to 12 km/h. NightMostly clear, with a low around 61°F16°C. Light wind from the SE around 2 mph4 km/h.
	SaturdaySep 5	83°F29°C	61°F16°C	0.01 in0.2 mm· 3%	7%	Clear	S 4 mph6 km/h
DayMostly clear and warm, with a high of 83°F29°C and morning low of 68°F20°C. Breezy from the S at 6 to 8 mph9 to 13 km/h. Dry air. NightMostly clear, with a low around 61°F16°C. Light wind from the ESE around 2 mph4 km/h.
	SundaySep 6	83°F28°C	66°F19°C	0.1 in2.5 mm· 24%	19%	Showers	SSW 4 mph6 km/h
DayMostly clear and warm, with a high of 83°F28°C and morning low of 69°F21°C. Breezy from the SSW at 6 to 8 mph9 to 13 km/h. 24% chance of showers throughout the day. NightMostly clear, with a low around 66°F19°C. Light wind from the E around 2 mph3 km/h. 24% chance of showers overnight.
	MondaySep 7	85°F30°C	63°F17°C	0.01 in0.2 mm· 4%	19%	Clear	SSW 4 mph6 km/h
DayMostly clear and warm, with a high of 85°F30°C and morning low of 70°F21°C. Breezy from the SSW at 5 to 7 mph8 to 12 km/h. Dry air. NightMostly clear, with a low around 63°F17°C. Light wind from the ENE around 2 mph4 km/h.
	TuesdaySep 8	87°F31°C	64°F18°C	0.02 in0.5 mm· 9%	33%	Clear	SSW 3 mph6 km/h
DayPartly cloudy and hot, with a high of 87°F31°C and morning low of 69°F21°C. Light wind from the SSW around 5 mph7 km/h. Dry air. NightPartly cloudy, with a low around 64°F18°C. Light wind from the NE around 2 mph4 km/h.
	WednesdaySep 9	89°F32°C	68°F20°C	0.04 in1 mm· 10%	28%	Drizzle	S 4 mph6 km/h
DayPartly cloudy and hot, with a high of 89°F32°C and morning low of 72°F22°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h. 10% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 68°F20°C. Light wind from the ENE around 2 mph4 km/h.
	ThursdaySep 10	89°F32°C	69°F21°C	0.01 in0.3 mm· 7%	17%	Clear	SSW 4 mph6 km/h
DayMostly clear and hot, with a high of 89°F32°C and morning low of 74°F23°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h. NightMostly clear, with a low around 69°F21°C. Light wind from the ESE around 2 mph3 km/h.
	FridaySep 11	88°F31°C	68°F20°C	0 in0 mm· —	18%	Clear	SSW 4 mph6 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 72°F22°C. Breezy from the SSW at 5 to 8 mph9 to 12 km/h. NightMostly clear, with a low around 68°F20°C. Light wind from the SE around 2 mph3 km/h.
	SaturdaySep 12	85°F30°C	67°F20°C	0.09 in2.2 mm· 12%	33%	Showers	SSW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 85°F30°C and morning low of 72°F22°C. Breezy from the SSW at 5 to 7 mph8 to 12 km/h. 12% chance of showers throughout the day. NightPartly cloudy, with a low around 67°F20°C. Light wind from the SE around 2 mph3 km/h.
	SundaySep 13	85°F29°C	67°F19°C	0.1 in2.6 mm· 10%	29%	Showers	SSW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 70°F21°C. Breezy from the SSW at 5 to 7 mph8 to 11 km/h. 10% chance of drizzle throughout the day. NightPartly cloudy, with a low around 67°F19°C. Light wind from the SE around 2 mph4 km/h. 10% chance of showers throughout the night.
	MondaySep 14	86°F30°C	66°F19°C	0.05 in1.3 mm· 10%	19%	Drizzle	SSW 4 mph6 km/h
DayMostly clear and hot, with a high of 86°F30°C and morning low of 72°F22°C. Light wind from the SSW around 5 mph8 km/h. 10% chance of drizzle throughout the day. NightMostly clear, with a low around 66°F19°C. Light wind from the ESE around 2 mph4 km/h.
	TuesdaySep 15	86°F30°C	67°F19°C	0.05 in1.2 mm· 10%	21%	Drizzle	S 4 mph6 km/h
DayMostly clear and warm, with a high of 86°F30°C and morning low of 71°F21°C. Light wind from the SSW around 5 mph8 km/h. 10% chance of drizzle throughout the day. NightMostly clear, with a low around 67°F19°C. Light wind from the SE around 2 mph4 km/h.
	WednesdaySep 16	87°F31°C	66°F19°C	0.02 in0.4 mm· 7%	19%	Clear	SSW 3 mph5 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 71°F22°C. Light wind from the SSW around 5 mph7 km/h. NightMostly clear, with a low around 66°F19°C. Light wind from the ESE around 2 mph3 km/h.
	ThursdaySep 17	88°F31°C	67°F19°C	0.02 in0.4 mm· 9%	18%	Clear	SSW 3 mph5 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 71°F21°C. Light wind from the SSW around 5 mph7 km/h. NightMostly clear, with a low around 67°F19°C. Light wind from the ESE around 2 mph3 km/h.

Nearby Cities

Pasadena3 mi5 km La Cañada Flintridge3 mi5 km South Pasadena5 mi8 km Arcadia6 mi10 km Alhambra7 mi11 km San Gabriel7 mi11 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: 34.1897°N, 118.1312°W·Elevation: 414m·Timezone: America/Los_Angeles·Population: 42,777