UTC Offset
UTC-07:00
Grass Valley, United States Snapshot 2026
Where is Grass Valley?
Grass Valley, United States
- Continent
- Americas
- Country
- United States
- City
- Grass Valley
- Population
- 12.9K
- Elevation
- 735 m
- Coordinates
- 39.22°, -121.06°
Grass Valley is a city in United States with a population of approximately 12.9K. Average temperatures range from 3°C (37°F) in February to 33°C (92°F) in July. The best time to visit is June, July, August, September. The city sits at an elevation of 735 m above sea level.
Time in Grass Valley right now
Open full time & time zone page 22:25 25
Monday, June 15, 2026
IANA time zone
America/Los_Angeles
Daylight saving
DST in effect
PST / PDT
Next DST change
November 1
backward -1h
Live weather in Grass Valley
Daylight in Grass Valley today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 55m
Climate normals for Grass Valley
Long-term monthly averages based on historical data.
January
Wet 
February
Wet March
Wet April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Fair December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 11°C / 3°C | 9°C / -1°C | 13days (279 mm) Wet | 6.2h Fair | 74% Muggy | 2.6 Moderate | Wet | View Details |
| February | 13°C / 3°C | 10°C / -1°C | 11days (251 mm) Wet | 7.7h Good | 67% Muggy | 3.2 Moderate | Wet | View Details |
| March | 13°C / 3°C | 11°C / 0°C | 16days (293 mm) Wet | 8.5h Good | 72% Muggy | 4.6 Moderate | Wet | View Details |
| April | 19°C / 6°C | 17°C / 3°C | 8days (107 mm) Wet | 10.8h Excellent | 62% Muggy | 6.4 High | Fair | View Details |
| May | 23°C / 10°C | 22°C / 7°C | 7days (63 mm) Good | 12.5h Excellent | 52% Moderate | 7.7 Very High | Good | View Details |
| June best | 30°C / 14°C | 29°C / 12°C | 2days (11 mm) Excellent | 13.6h Excellent | 38% Comfortable | 8.1 Very High | Excellent | View Details |
| July best | 33°C / 17°C | 32°C / 16°C | 0days (0 mm) Excellent | 13.6h Excellent | 32% Comfortable | 8.2 Very High | Excellent | View Details |
| August best | 32°C / 17°C | 31°C / 16°C | 1days (5 mm) Excellent | 12.6h Excellent | 36% Comfortable | 7.5 Very High | Excellent | View Details |
| September best | 29°C / 15°C | 27°C / 13°C | 3days (24 mm) Excellent | 11.2h Excellent | 41% Moderate | 6.2 High | Excellent | View Details |
| October | 23°C / 10°C | 20°C / 7°C | 5days (84 mm) Good | 9.4h Good | 48% Moderate | 4.7 Moderate | Good | View Details |
| November | 15°C / 5°C | 13°C / 2°C | 9days (168 mm) Wet | 7.6h Good | 64% Muggy | 3 Moderate | Fair | View Details |
| December | 11°C / 3°C | 9°C / -1°C | 11days (279 mm) Wet | 6.1h Fair | 74% Muggy | 2.2 Moderate | Wet | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 11°C / 3°C . Feb: 13°C / 3°C . Mar: 13°C / 3°C . Apr: 19°C / 6°C . May: 23°C / 10°C . Jun: 30°C / 14°C . Jul: 33°C / 17°C . Aug: 32°C / 17°C . Sep: 29°C / 15°C . Oct: 23°C / 10°C . Nov: 15°C / 5°C . Dec: 11°C / 3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 279 mm. Feb: 251 mm. Mar: 293 mm. Apr: 107 mm. May: 63 mm. Jun: 11 mm. Jul: 0 mm. Aug: 5 mm. Sep: 24 mm. Oct: 84 mm. Nov: 168 mm. Dec: 279 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 74%. Feb: 67%. Mar: 72%. Apr: 62%. May: 52%. Jun: 38%. Jul: 32%. Aug: 36%. Sep: 41%. Oct: 48%. Nov: 64%. Dec: 74%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 17 km/h . Mar: 15 km/h . Apr: 14 km/h . May: 14 km/h . Jun: 13 km/h . Jul: 13 km/h . Aug: 12 km/h . Sep: 13 km/h . Oct: 14 km/h . Nov: 14 km/h . Dec: 15 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 3. Mar: UV 5. Apr: UV 6. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 6. Oct: UV 5. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Grass Valley has a population of approximately 12.9K.
The best months to visit Grass Valley are June, July, August, September, when temperatures are pleasant and rainfall is lower.
Grass Valley receives approximately 1564mm of rainfall annually across 86 rainy days.
Grass Valley is located in United States, in the Americas region.
Grass Valley sits at an elevation of 735 m (2,411 ft) above sea level.