Butte Valley, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Butte Valley weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——95°64°—
- FridayJun 5Overcast——96°69°+1°
- SaturdayJun 6Overcast——85°61°-11°
- SundayJun 7Overcast——85°55°0°
- MondayJun 8Light Drizzle26%0.04″68°55°-17°
- TuesdayJun 9Light Drizzle27%0.04″70°59°+2°
- WednesdayJun 10Overcast——79°50°+9°
Ozone at AQI 38 now. AQI down 5 over the last 6 hours (steady decline since this morning). With UV 6.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 32 by mid-afternoon.
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 38 now. With UV 6.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 32 by mid-afternoon.
- Present
- AQI 38
- UV peak
- 6.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 32
PM × Wind × Precip
PM2.5 at 5.1 µg/m³ (AQI 28) with a 0.84 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.84
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:38 AM
- Moonset
- 4:15 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Butte Valley at a glance
- Today vs. normal: 77°F — typical for the season
- Last frost: April 14 (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 4, 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.