Acton, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Acton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——85°62°—
- MondayJul 6Clear——87°60°+2°
- TuesdayJul 7Clear——91°61°+4°
- WednesdayJul 8Clear——96°62°+5°
- ThursdayJul 9Clear——96°63°0°
- FridayJul 10Overcast——93°62°-3°
- SaturdayJul 11Overcast——93°62°0°
AQI 52 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.3 µg/m³, PM10 at 13.2 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 34 now. With UV 10 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 47 around 1 PM.
- Present
- AQI 34
- UV peak
- 10.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 47
PM × Wind × Precip
PM2.5 at 10.3 µg/m³, PM10 at 13.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.78
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:09 PM
- Moonset
- 11:11 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Acton at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: March 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 93510
16-Day Forecast — Acton
- Sun85°62°1%
- Mon87°60°0%
- Tue91°61°0%
- Wed96°62°0%
- Thu96°63°0%
- Fri93°62°0%
- Sat93°62°0%
- Sun96°67°3%
- Mon97°68°7%
- Tue94°72°11%
- Wed90°70°8%
- Thu93°70°13%
- Fri101°75°16%
- Sat107°81°10%
- Sun96°77°16%
- Mon96°72°15%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
ZIP codes in Acton
- 93510