Brea, California Weather
Coastal fog thickens at dawn. Day 78 of spring. Read this microseason across nine climate regions →
Brea weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 5Foggy——82°59°—
- SaturdayJun 6Foggy——74°59°-8°
- SundayJun 7Mostly Clear——78°61°+4°
- MondayJun 8Overcast——80°62°+2°
- TuesdayJun 9Clear——80°64°0°
- WednesdayJun 10Clear——81°66°+1°
- ThursdayJun 11Clear——83°65°+2°
AQI 72 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 22.0 µg/m³ (AQI 75) with a 0.76 fine-to-coarse ratio and 2 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 22.0 µg/m³ (AQI 75) with a 0.76 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.76
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 6:40 AM
- Moonset
- 5:16 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Brea at a glance
- Today vs. normal: 19°F below the seasonal normal for this latitude
- Last frost: March 11 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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.