Vallecito, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Vallecito weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——89°58°—
- FridayJun 5Overcast——91°69°+2°
- SaturdayJun 6Overcast——82°57°-9°
- SundayJun 7Overcast——79°51°-3°
- MondayJun 8Rain18%0.74″65°50°-14°
- TuesdayJun 9Showers21%0.47″62°49°-3°
- WednesdayJun 10Overcast——76°49°+14°
Ozone at AQI 49 now. AQI flat over the last 6 hours (within ±3 points). With UV 9.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 61 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 49 now. With UV 9.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 61 by mid-afternoon.
- Present
- AQI 49
- UV peak
- 9.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 61
PM × Wind × Precip
PM2.5/PM10 ratio 0.54 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.54
- Wind
- light
- 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
- 6:28 AM
- Moonset
- 4:14 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Vallecito at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 5 (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.