College City, California Weather
Coastal fog thickens at dawn. Day 76 of spring. Read this microseason across nine climate regions →
College City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——93°60°—
- ThursdayJun 4Clear——94°60°+1°
- FridayJun 5Overcast——102°66°+8°
- SaturdayJun 6Overcast——92°61°-10°
- SundayJun 7Overcast——90°52°-2°
- MondayJun 8Overcast11%—90°59°0°
- TuesdayJun 9Partly Cloudy——88°60°-2°
PM2.5 at 17.2 µg/m³ (AQI 66) with a 0.68 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust. 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 47 now. With UV 8.7 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 54 by mid-afternoon.
- Present
- AQI 47
- UV peak
- 8.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 54
PM × Wind × Precip
PM2.5 at 17.2 µg/m³ (AQI 66) with a 0.68 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.68
- 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
- 5:59 AM
- Moonset
- 3:15 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
College City at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- 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 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.