Live Weather & Forecast

Weather in Grass Valley

California, United States · Real-time conditions & 3-day outlook

Flag of United States
Sunny
11°C
Feels like 10°C
51°F / Feels 50°F
Sunny
Grass Valley, California
🌞 Daytime
Updated: 2026-04-15 08:15
💧
Humidity
62%
💨
Wind
4.7 km/h ESE
🌬️
Wind Gust
7.2 km/h
🌡️
Pressure
1017 mb
👁️
Visibility
10 km
☀️
UV Index
0.5 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
3.3°C
🌐
Wind Degree
117°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
158.9 μg/m³
NO₂
4.7 μg/m³
O₃
93 μg/m³
SO₂
3.1 μg/m³
PM 2.5
5.8 μg/m³
PM 10
7.8 μg/m³

Weather Alerts 3

Met · Moderate · Expected
Lake Wind Advisory issued April 14 at 2:09PM PDT until April 16 at 7:00AM PDT by NWS Reno NV

* WHAT...Southwest winds 20 to 25 mph with gusts up to 35 mph and wave heights 1 to 3 feet. * WHERE...Greater Lake Tahoe Area. * WHEN...From 2 PM Wednesday to 7 AM PDT Thursday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.

Effective: 2026-04-14T14:09:00-07:00  ·  Expires: 2026-04-15T16:00:00-07:00
Met · Moderate · Expected
Lake Wind Advisory issued April 15 at 12:06AM PDT until April 16 at 7:00AM PDT by NWS Reno NV

* WHAT...Southwest winds 20 to 25 mph with gusts up to 35 mph and wave heights 1 to 3 feet. * WHERE...Greater Lake Tahoe Area. * WHEN...From 2 PM this afternoon to 7 AM PDT Thursday. * IMPACTS...Small boats, kayaks and paddle boards will be prone to capsizing and should remain off lake waters until conditions improve.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.

Effective: 2026-04-15T00:06:00-07:00  ·  Expires: 2026-04-16T05:00:00-07:00
Met · Severe · Future
Freeze Watch issued April 15 at 12:06AM PDT until April 17 at 8:00AM PDT by NWS Reno NV

* WHAT...Sub-freezing temperatures with lows 21 to 27 degrees Friday morning. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...From Thursday evening through Friday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold. To prevent water pipes from freezing; wrap or drain or allow them to drip slowly.

Effective: 2026-04-15T00:06:00-07:00  ·  Expires: 2026-04-16T05:00:00-07:00

Today's Hourly Forecast

24-hour breakdown for Grass Valley, California

12 AM
Clear
10°
Clear
💧 77% 💨 7.6 km/h
1 AM
Clear
9°
Clear
💧 81% 💨 7.2 km/h
2 AM
Clear
9°
Clear
💧 82% 💨 7.6 km/h
3 AM
Clear
9°
Clear
💧 83% 💨 7.6 km/h
4 AM
Clear
8°
Clear
💧 82% 💨 7.2 km/h
5 AM
Clear
8°
Clear
💧 66% 💨 6.8 km/h
6 AM
Clear
8°
Clear
💧 64% 💨 6.5 km/h
7 AM
Sunny
9°
Sunny
💧 62% 💨 6.5 km/h
8 AM
Sunny
11°
Sunny
💧 62% 💨 4.7 km/h
9 AM
Sunny
11°
Sunny
💧 73% 💨 6.1 km/h
10 AM
Sunny
13°
Sunny
💧 78% 💨 9 km/h
11 AM
Sunny
15°
Sunny
💧 77% 💨 10.1 km/h
12 PM
Sunny
15°
Sunny
💧 73% 💨 13 km/h
1 PM
Sunny
16°
Sunny
💧 70% 💨 13.7 km/h
2 PM
Sunny
16°
Sunny
💧 72% 💨 14.4 km/h
3 PM
Sunny
16°
Sunny
💧 74% 💨 14.4 km/h
4 PM
Sunny
16°
Sunny
💧 72% 💨 13.3 km/h
5 PM
Sunny
16°
Sunny
💧 74% 💨 13 km/h
6 PM
Sunny
16°
Sunny
💧 71% 💨 12.6 km/h
7 PM
Sunny
14°
Sunny
💧 75% 💨 10.8 km/h
8 PM
Patchy rain nearby
13°
Patchy rain nearby
💧 75% 💨 10.1 km/h 🌧️ 100%
9 PM
Patchy rain nearby
12°
Patchy rain nearby
💧 85% 💨 11.2 km/h 🌧️ 81%
10 PM
Patchy rain nearby
12°
Patchy rain nearby
💧 91% 💨 7.2 km/h 🌧️ 68%
11 PM
Cloudy
12°
Cloudy
💧 83% 💨 6.5 km/h

3-Day Forecast

Daily overview for Grass Valley, California

Today
Patchy rain nearby
Patchy rain nearby
17° / 8°
🌧️ 81% chance of rain
💧 Avg. humidity: 75%
💨 Max wind: 14.4 km/h
🌧️ Total precip: 0.13 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:27 AM
🌇 Sunset: 07:42 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Partly Cloudy
Partly Cloudy
16° / 6°
🌧️ 0% chance of rain
💧 Avg. humidity: 60%
💨 Max wind: 19.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:26 AM
🌇 Sunset: 07:43 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Sunny
Sunny
19° / 7°
🌧️ 0% chance of rain
💧 Avg. humidity: 35%
💨 Max wind: 14 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:24 AM
🌇 Sunset: 07:44 PM
🌙 New Moon
🌑 Moon: 0% lit

Best Time to Visit Grass Valley

Plan your trip to Grass Valley, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Grass Valley 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Grass Valley?
Current conditions in Grass Valley: Sunny, temperature 11°C, humidity 62%.
What is the best time to visit Grass Valley?
The best time to visit Grass Valley is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Grass Valley?
Grass Valley is located at approximately 39.2° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Grass Valley?
The wettest period in Grass Valley is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Grass Valley?
For visits to Grass Valley during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Grass Valley in?
Grass Valley is located in United States, in the state of California.
What are the public holidays in Grass Valley in 2026?
View the 2026 public holidays for Grass Valley on our Holidays page.
What are the GPS coordinates used for the weather forecast in Grass Valley?
The weather forecast for Grass Valley uses coordinates 39.2191, -121.0629.