Grass Valley, California Climate
United States
Pop. 12,944 Elev. 737 m / 2,418 ft
TZ: America/Los_Angeles (UTC-7) ·
Summers in Grass Valley are warm, with August highs around 91°F (33°C), while winters are cool with January lows of 36°F (2°C). Expect around 60 rainy days annually (61.1 in / 1551 mm total), with snow on 4 days and 28 in (723 mm) of annual accumulation. The city averages 231 sunny days per year and around 42 thunderstorm days. Nearby lake water reaches 63°F (17°C) in summer.
| Temperature | 91°F (33°C) high | 36°F (2°C) low |
| Feels like | 84°F (29°C) high | 32°F (0°C) low |
| Rain | 60 days | 61.1 in (1551 mm) /yr |
| Snow | 4 days | 28.5 in (723 mm) /yr |
| Sky | 231 sunny | 42 stormy |
| Wind | 2.1 mph (0.9 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Apr, May, Jun, Sep, Oct
Sky & Air by Month
Cloud cover (%)
25
Jan 62
Feb 63
Mar 43
Apr 22
May 9
Jun 10
Jul 11
Aug 32
Sep 34
Oct 51
Nov 53
Dec Humidity (%)
46
Jan 65
Feb 67
Mar 56
Apr 43
May 32
Jun 37
Jul 34
Aug 46
Sep 62
Oct 71
Nov 75
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 46 mi Sacramento International Airport (SMF)
Ski resort 39 mi Sugar Bowl Resort
National park 6 mi South Yuba River State Park
Mountain peak
(5,184 ft) 20 mi Cherry Hill
Hospital 1 mi Sierra Nevada Memorial Hospital
Hiking trail 5 mi Independence Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 59°F 15°C | 36°F 2°C | 1.5 in 38 mm | 1.2 in31 mm | 24 |
| February | 58°F 14°C | 39°F 4°C | 17.1 in 435 mm | 1.2 in30 mm | 7 |
| March | 60°F 15°C | 40°F 5°C | 10.5 in 266 mm | 19.0 in483 mm | 9 |
| April | 68°F 20°C | 44°F 7°C | 2.2 in 57 mm | 6.3 in160 mm | 15 |
| May | 79°F 26°C | 51°F 11°C | 1.3 in 34 mm | 0.1 in3 mm | 24 |
| June | 88°F 31°C | 59°F 15°C | 0.1 in 2 mm | — | 30 |
| July | 89°F 32°C | 60°F 16°C | 0.0 in 1 mm | — | 28 |
| August | 91°F 33°C | 62°F 17°C | 0.2 in 4 mm | — | 29 |
| September | 84°F 29°C | 59°F 15°C | 1.3 in 33 mm | — | 21 |
| October | 70°F 21°C | 47°F 9°C | 3.4 in 87 mm | 0.0 in1 mm | 21 |
| November | 63°F 17°C | 43°F 6°C | 7.2 in 183 mm | — | 11 |
| December | 56°F 13°C | 41°F 5°C | 16.3 in 413 mm | 0.6 in16 mm | 12 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 24 | 1 |
| February | 7 | 8 |
| March | 9 | 12 |
| April | 15 | 2 |
| May | 24 | 2 |
| June | 30 | 0 |
| July | 28 | 0 |
| August | 29 | 0 |
| September | 21 | 2 |
| October | 21 | 3 |
| November | 11 | 5 |
| December | 12 | 7 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 36°F 2°C |
| February | 34°F 1°C |
| March | 35°F 1°C |
| April | 37°F 3°C |
| May | 42°F 5°C |
| June | 49°F 9°C |
| July | 59°F 15°C |
| August | 63°F 17°C |
| September | 60°F 16°C |
| October | 52°F 11°C |
| November | 46°F 8°C |
| December | 42°F 6°C |