Current conditions at

ACTON (ATNC1)

Lat: 34.44639° N Lon: 118.1968° W Elev: 2600.0 ft.

NA

51°F

11°C

Humidity 87%
Wind Speed SSW 5 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 26 May 01:54 AM PDT
Detailed forecast for

Western San Gabriel Mountains and Highway 14 Corridor

Tonight
Clear in the evening, becoming mostly cloudy with patchy drizzle after midnight. Lows in the mid 40s to lower 50s. Southwest wind around 15 mph with gusts to 30 mph.
Tuesday
Mostly cloudy with patchy drizzle in the morning, becoming partly cloudy in the afternoon. Highs from the 60s to around 70 at low elevations to the 50s to around 60 at high elevations. Southwest wind 15 to 25 mph with gusts to 40 mph.
Tuesday Night
Mostly cloudy. Patchy drizzle after midnight. Lows in the upper 30s and 40s. Southwest wind 15 to 25 mph. Gusts to 40 mph in the evening.
Wednesday
Mostly cloudy with patchy drizzle in the morning, becoming partly cloudy with a slight chance of rain in the afternoon. Highs from the upper 50s to mid 60s at low elevations to the upper 40s to mid 50s at high elevations. Southwest wind 15 to 25 mph.
Wednesday Night
Partly cloudy in the evening then areas of low clouds and fog. A slight chance of rain in the evening. Lows in the mid 30s to mid 40s. Southwest wind 15 to 25 mph.
Thursday
Patchy low clouds and fog. Highs from the lower to mid 60s at low elevations to the 50s at high elevations.
Thursday Night
Mostly clear. Lows in the upper 30s to mid 40s.
Friday
Sunny. Highs from around 70 at low elevations to the lower to mid 60s at high elevations.
Friday Night
Clear. Lows in the mid 40s to mid 50s.
Saturday
Sunny. Highs from the mid 70s to around 80 at low elevations to the upper 60s to mid 70s at high elevations.
Saturday Night
Clear. Lows in the 50s to around 60.
Sunday
Sunny. Highs from the lower to mid 80s at low elevations to the mid to upper 70s at high elevations.
Sunday Night
Clear. Lows in the mid 50s to lower 60s.
Monday
Sunny. Highs from the mid to upper 80s at low elevations to the mid 70s to around 80 at high elevations.



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408 PM PDT Mon May 25 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database