Sonoma, California Weather
Coastal fog thickens at dawn. Day 76 of spring. Read this microseason across nine climate regions →
Sonoma weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Foggy——90°51°—
- ThursdayJun 4Overcast——85°52°-5°
- FridayJun 5Overcast——92°52°+7°
- SaturdayJun 6Overcast——82°49°-10°
- SundayJun 7Overcast——83°46°+1°
- MondayJun 8Overcast11%—84°48°+1°
- TuesdayJun 9Overcast11%—76°49°-8°
Ozone at AQI 500 now. AQI flat over the last 6 hours (within ±3 points). With UV 9.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 642 by mid-afternoon.
AVOID OUTDOORS Avoid outdoor exertion. Keep windows closed; use HEPA filtration indoors if available.
What's driving it
Ozone × UV × Sky
Ozone at AQI 500 now. With UV 9.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 642 by mid-afternoon.
- Present
- AQI 500
- UV peak
- 9.6 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 642
PM × Wind × Precip
PM2.5 at 13.8 µg/m³ (AQI 60) with a 0.70 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.70
- Wind
- light
- 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
- 5:58 AM
- Moonset
- 3:20 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Sonoma at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 6 (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 3, 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.