Grass Valley, Nevada Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Grass Valley weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast14%—95°56°—
- MondayJul 6Overcast——91°66°-4°
- TuesdayJul 7Overcast——93°65°+2°
- WednesdayJul 8Overcast——91°69°-2°
- ThursdayJul 9Clear——92°68°+1°
- FridayJul 10Clear——96°71°+4°
- SaturdayJul 11Overcast——100°71°+4°
AQI 35 (Good), driven by Ozone. AQI down 11 over the last 6 hours (gradual decline). Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 36
- UV peak
- 7.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 18
PM × Wind × Precip
PM2.5 at 4.9 µg/m³, PM10 at 9.7 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.51
- Wind
- calm
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:11 PM
- Moonset
- 11:08 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Grass Valley at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: April 21 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Grass Valley
- Sun95°56°14%
- Mon91°66°3%
- Tue93°65°2%
- Wed91°69°0%
- Thu92°68°0%
- Fri96°71°0%
- Sat100°71°1%
- Sun98°73°1%
- Mon101°76°8%
- Tue103°79°12%
- Wed97°72°11%
- Thu89°70°10%
- Fri93°71°16%
- Sat99°77°18%
- Sun102°79°13%
- Mon100°77°12%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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.
SPC Convective Outlook
Storm Prediction Center — Grass Valley
SPC includes Grass Valley in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Grass Valley
- 89445