Boulder Creek, California Weather
Coastal fog thickens at dawn. Day 78 of spring. Read this microseason across nine climate regions →
Boulder Creek weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 5Clear——86°54°—
- SaturdayJun 6Clear——66°47°-20°
- SundayJun 7Overcast——83°44°+17°
- MondayJun 8Overcast18%—77°48°-6°
- TuesdayJun 9Foggy22%—75°47°-2°
- WednesdayJun 10Clear——86°45°+11°
- ThursdayJun 11Clear——93°57°+7°
AQI 34 (Good), driven by PM2.5. AQI down 8 over the last 6 hours (steady decline since this morning). PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.73 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 8.5 µg/m³ (AQI 47) with a 0.73 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.73
- 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
- 7:04 AM
- Moonset
- 5:27 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Boulder Creek at a glance
- Today vs. normal: 20°F below the seasonal normal for this latitude
- Last frost: March 30 (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 5, 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.