Current conditions at

ACTON (ATNC1)

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

NA

84°F

29°C

Humidity 13%
Wind Speed SW 15 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Heat Index81°F (27°C)
Last update 01 Sep 01:54 PM PDT
Detailed forecast for

Western San Gabriel Mountains and Highway 14 Corridor

Tonight
Clear. Lows in the upper 40s and 50s. Southwest winds 15 to 25 mph.
Wednesday
Sunny. Highs from the upper 70s to mid 80s at low elevations to the upper 60s to mid 70s at high elevations. Southwest winds 15 to 25 mph.
Wednesday Night
Clear. Lows in the 50s to around 60. Southwest winds 15 to 25 mph. Gusts to 35 mph in the evening.
Thursday
Sunny. Highs from the upper 70s to mid 80s at low elevations to the upper 60s to mid 70s at high elevations. West winds around 15 mph in the afternoon.
Thursday Night
Clear. Lows in the 50s to around 60. Southwest winds 15 to 25 mph.
Friday
Sunny. Highs from the upper 70s to mid 80s at low elevations to the upper 60s to mid 70s at high elevations.
Friday Night
Mostly clear. Lows in the mid 50s to lower 60s.
Saturday
Partly cloudy with a slight chance of showers. Highs from the upper 70s to mid 80s at low elevations to the lower to mid 70s at high elevations.
Saturday Night
Partly cloudy in the evening then mostly cloudy. A chance of showers. Lows in the upper 50s to mid 60s.
Sunday
Mostly cloudy with a chance of showers. Highs from the upper 70s to mid 80s at low elevations to the lower to mid 70s at high elevations.
Sunday Night
Mostly cloudy in the evening then partly cloudy. A chance of showers. Lows in the upper 50s and 60s.
Labor Day
Mostly cloudy with a chance of showers. Highs from the lower to mid 80s at low elevations to the 70s at high elevations.
Monday Night
Partly cloudy with a slight chance of showers. Lows in the upper 50s and 60s.
Tuesday
Partly cloudy with a slight chance of showers. Highs from the 80s at low elevations to the 70s at high elevations.



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202 PM PDT Tue Sep 1 2026
 
 

Additional Resources

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Link to Local Radar Data Link to Satellite Data

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National Digital Forecast Database