Westmont, California Weather
Summer solstice light stretched thin. Day 88 of spring. Read this microseason across nine climate regions →
Westmont weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Foggy——73°62°—
- TuesdayJun 16Foggy——72°60°-1°
- WednesdayJun 17Clear——74°65°+2°
- ThursdayJun 18Clear——74°65°0°
- FridayJun 19Mostly Clear——69°62°-5°
- SaturdayJun 20Mostly Clear——68°61°-1°
- SundayJun 21Partly Cloudy——71°63°+3°
AQI 45 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 13.8 µg/m³ (AQI 60) with a 0.90 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
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 13.8 µg/m³ (AQI 60) with a 0.90 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 5:55 AM
- Moonset
- 8:21 PM
- In sign
- ♋︎ Cancer
Summer solstice light stretched thin
Westmont at a glance
- Today vs. normal: 18°F below the seasonal normal for this latitude
- Last frost: March 11 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Westmont
- Mon73°62°1%
- Tue72°60°1%
- Wed74°65°0%
- Thu74°65°1%
- Fri69°62°0%
- Sat68°61°0%
- Sun71°63°0%
- Mon70°64°0%
- Tue71°65°0%
- Wed73°65°0%
- Thu73°65°0%
- Fri71°63°0%
- Sat69°63°0%
- Sun70°63°0%
- Mon72°64°3%
- Tue75°65°3%
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 Westmont
- 90044
- 90047