Philo, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Philo weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Foggy——76°52°—
- FridayJun 5Overcast——76°51°0°
- SaturdayJun 6Overcast——70°47°-6°
- SundayJun 7Overcast——70°42°0°
- MondayJun 8Light Rain34%0.60″57°48°-13°
- TuesdayJun 9Light Drizzle34%—65°49°+8°
- WednesdayJun 10Partly Cloudy——77°48°+12°
PM2.5/PM10 ratio 0.65 with 13 mph wind — characteristic of long-range haze transport rather than a local source. AQI flat over the last 6 hours (within ±3 points).
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 35 now. With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 42 by mid-afternoon.
- Present
- AQI 35
- UV peak
- 9.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 42
PM × Wind × Precip
PM2.5/PM10 ratio 0.65 with 13 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.65
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 6:43 AM
- Moonset
- 4:24 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Philo at a glance
- Today vs. normal: 76°F — typical for the season
- Last frost: April 10 (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.