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Altadena, CA Weather Forecast
Altadena, CA Weather Forecast Dated: 728 AM Mon Sep 21 2026
Expect a very warm period with plenty of sunshine and mostly dry weather over the coming period. comfortable humidity and no major pressure swings will dominate.
Monday, September 21, 2026
Mid-Morning
60°F 15°C
Overcast
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
65°F 18°C
Sunny
Pleasant near 71°F 22°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds turning from the SSE to the ESE at 5 mph 9 km/h.
Tuesday, September 22, 2026
Mid-Morning
63°F 17°C
Sunny
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
71°F 22°C
Sunny
Comfortable with temperatures reaching 77°F 25°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the SSW to the ESE at 4 mph 5 km/h.
Wednesday, September 23, 2026
Mid-Morning
74°F 24°C
Sunny
Mid-Afternoon
83°F 29°C
Sunny
Early-Evening
77°F 25°C
Sunny
Quite warm around 83°F 29°C, sunny throughout the day, with increasing humidity and steady pressure.
Thursday, September 24, 2026
Mid-Morning
74°F 23°C
Smoky Haze
Mid-Afternoon
83°F 29°C
Sunny
Early-Evening
76°F 25°C
Sunny
Warm temperatures up to 83°F 29°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the SW to the SE at 5 mph 7 km/h.
Friday, September 25, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
75°F 24°C
Sunny
Very warm with a high of 80°F 27°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the SW to the ESE at 5 mph 7 km/h.
Saturday, September 26, 2026
Mid-Morning
69°F 20°C
Sunny
Mid-Afternoon
78°F 26°C
Sunny
Early-Evening
73°F 23°C
Sunny
Pleasant near 78°F 26°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure.
Sunday, September 27, 2026
Mid-Morning
69°F 21°C
Partly Cloudy
Mid-Afternoon
78°F 25°C
Overcast
Early-Evening
76°F 24°C
Cloudy
Comfortable with temperatures reaching 78°F 25°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure.
Monday, September 28, 2026
Mid-Morning
81°F 27°C
Scattered Showers
Mid-Afternoon
88°F 31°C
Sunny
Early-Evening
85°F 29°C
Partly Cloudy
Quite warm around 88°F 31°C, scattered downpours possible, with steady humidity and steady pressure.
Tuesday, September 29, 2026
Mid-Morning
73°F 23°C
Scattered Showers
Mid-Afternoon
79°F 26°C
Sunny
Early-Evening
77°F 25°C
Sunny
Mild temperatures up to 79°F 26°C, locally heavy downpours at times, with steady humidity and steady pressure.
Wednesday, September 30, 2026
Mid-Morning
73°F 23°C
Scattered Showers
Mid-Afternoon
81°F 27°C
Scattered Showers
Early-Evening
77°F 25°C
Partly Cloudy
Very warm with a high of 81°F 27°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.
Thursday, October 1, 2026
Mid-Morning
79°F 26°C
Overcast
Mid-Afternoon
87°F 30°C
Overcast
Early-Evening
82°F 27°C
Overcast
Warm and summery near 87°F 30°C, overcast in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure.
Friday, October 2, 2026
Mid-Morning
75°F 24°C
Overcast
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
77°F 25°C
Overcast
Balmy with temperatures reaching 81°F 27°C, overcast throughout the day, with steady humidity and steady pressure.
Saturday, October 3, 2026
Mid-Morning
74°F 23°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
77°F 25°C
Sunny
Quite warm around 82°F 28°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds shifting from the SSE to the SE at 5 mph 8 km/h.
Sunday, October 4, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
80°F 27°C
Sunny
Early-Evening
77°F 25°C
Sunny
Warm temperatures up to 80°F 27°C, sunny throughout the day, with lower humidity and steady pressure.
Altadena, CA Weather Radar Map
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