Grass Valley, Nevada Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Grass Valley weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Clear——84°55°—
- FridayJun 5Overcast——89°58°+5°
- SaturdayJun 6Overcast——82°64°-7°
- SundayJun 7Overcast——72°50°-10°
- MondayJun 8Light Drizzle16%0.07″70°56°-2°
- TuesdayJun 9Light Drizzle24%0.06″67°54°-3°
- WednesdayJun 10Overcast11%—65°53°-2°
PM2.5 at 12.0 µg/m³, PM10 at 51.1 µg/m³ — typical background levels with no transport signature. AQI down 6 over the last 6 hours (steady decline since this morning).
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 36 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 16 by mid-afternoon.
- Present
- AQI 36
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 16
PM × Wind × Precip
PM2.5 at 12.0 µg/m³, PM10 at 51.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.23
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 6:25 AM
- Moonset
- 3:56 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Grass Valley at a glance
- Today vs. normal: 8°F below the seasonal normal for this latitude
- Last frost: April 21 (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.