Weather StoryAlmanac, microseasons, and the day's weather story.

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

Grass Valley, NV
Sunday, July 5 at 9:09 AM
77
°
Overcast
Feels like
71°
Humidity
16%
Wind
3 mph
Sunrise
10:25 PM
Sunset
1:25 PM
Grass Valley, NV
Hour by hour · 24h
24-Hour ForecastGrass Valley, NV: 24-hour forecast. Temperatures range from 66 to 95 degrees Fahrenheit.
L 66°H 95°
Grass Valley, NV
7-day forecast
  1. Today
    Jul 5
    Overcast
    14%
    95°56°
  2. Monday
    Jul 6
    Overcast
    91°66°-4°
  3. Tuesday
    Jul 7
    Overcast
    93°65°+2°
  4. Wednesday
    Jul 8
    Overcast
    91°69°-2°
  5. Thursday
    Jul 9
    Clear
    92°68°+1°
  6. Friday
    Jul 10
    Clear
    96°71°+4°
  7. Saturday
    Jul 11
    Overcast
    100°71°+4°
Grass Valley, NV
Anemometer · 24h winds · from true
NESW
From · True
S
189° · backing 133°
Direction
S
189°
Sustained
3
mph
Gust
11
mph
Peak 24h
11
avg 4
Beaufort · 1 · LIGHT AIR
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 4 · pk 11 @ 9:00a
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 336SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 133° from the s.
Grass Valley, NV
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
865.5
+5.6 mb in 3h · rising rapidly · 25.56 inHg
Now
865.5
mb
3h
+5.6
mb
12h
+0.4
mb
24h
-3.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 859871
855860865870875-21h-18h-15h-12h-9h-6h-3h-24hNOW870.8859.2865.5
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Grass Valley, NV
Air quality
35
AQI
Good
-11 in 6hPeak ~43 @ 10 PM

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.

PM 2.5Good
4.9μg/m³
PM 10Good
10μg/m³
NO₂Good
5μg/m³
OzoneDRIVERModerate
76μg/m³
UV IndexModerate
3.7

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
Grass Valley, NV
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow

Visibility
176.7mi
UNLIMITED
185 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
16:09 UTC · Grass Valley, NV · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
16:09 UTC · Grass Valley, NV · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Grass Valley, NV
Satellite · infrared · animated
Grass Valley, NV
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Grass Valley, NV
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:53 AM
Sunrise
10:25 PM
Daylight
15h 00m
Sunset
1:25 PM
Civil dusk
8:59 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Grass Valley, NV
The moon
Waning Gibbous
71% illuminated
Moonrise
11:11 PM
Moonset
11:08 AM
In sign
♓︎ Pisces
Grass Valley, NV
Microseason
Jul 1–5

Summer heat deepens across the valleys

weather
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

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

  1. Sun95°56°14%
  2. Mon91°66°3%
  3. Tue93°65°2%
  4. Wed91°69°0%
  5. Thu92°68°0%
  6. Fri96°71°0%
  7. Sat100°71°1%
  8. Sun98°73°1%
  9. Mon101°76°8%
  10. Tue103°79°12%
  11. Wed97°72°11%
  12. Thu89°70°10%
  13. Fri93°71°16%
  14. Sat99°77°18%
  15. Sun102°79°13%
  16. 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

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.