Acton, California Weather
Summer solstice light stretched thin. Day 88 of spring. Read this microseason across nine climate regions →
Acton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Clear——90°63°—
- TuesdayJun 16Clear——91°66°+1°
- WednesdayJun 17Overcast——87°61°-4°
- ThursdayJun 18Clear——84°56°-3°
- FridayJun 19Clear——83°55°-1°
- SaturdayJun 20Clear——80°50°-3°
- SundayJun 21Clear——80°50°0°
AQI 51 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.6 µg/m³, PM10 at 13.0 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
PM × Wind × Precip
PM2.5 at 11.6 µg/m³, PM10 at 13.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.89
- Wind
- light
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:52 AM
- Moonset
- 8:22 PM
- In sign
- ♋︎ Cancer
Summer solstice light stretched thin
Acton at a glance
- Today vs. normal: 8°F below the seasonal normal for this latitude
- Last frost: March 14 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Acton
- Mon90°63°0%
- Tue91°66°0%
- Wed87°61°0%
- Thu84°56°0%
- Fri83°55°0%
- Sat80°50°0%
- Sun80°50°0%
- Mon89°52°0%
- Tue91°57°0%
- Wed90°60°0%
- Thu85°56°0%
- Fri80°50°0%
- Sat81°49°0%
- Sun88°51°3%
- Mon93°57°3%
- Tue99°60°6%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of June 15, 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