Napa, California Climate
United States
Pop. 80,434 Elev. 9 m / 30 ft
TZ: America/Los_Angeles (UTC-7) ·
Napa has a dry climate with warm summers reaching 88°F (31°C) in August and cool winters averaging 41°F (5°C) in January. Rain falls on about 26 days per year (19.9 in / 504 mm total). The city averages 201 sunny days per year. Ocean water temperatures reach 62°F (17°C) in summer.
| Temperature | 88°F (31°C) high | 41°F (5°C) low |
| Feels like | 92°F (33°C) high | 41°F (5°C) low |
| Rain | 26 days | 19.9 in (504 mm) /yr |
| Sky | 201 sunny | 15 stormy |
| Wind | 3.9 mph (1.7 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jan, Apr, May, Jun, Jul, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
36
Jan 61
Feb 57
Mar 47
Apr 22
May 15
Jun 26
Jul 15
Aug 37
Sep 41
Oct 68
Nov 63
Dec Humidity (%)
59
Jan 73
Feb 71
Mar 67
Apr 51
May 57
Jun 64
Jul 54
Aug 62
Sep 67
Oct 81
Nov 83
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 25 mi Buchanan Field (CCR)
Ski resort 126 mi Sugar Bowl Resort
National park 15 mi Jack London State Historic Park
Mountain peak
(6,113 ft) 70 mi Goat Mountain
Hospital 2 mi Napa State Hospital
Hiking trail 9 mi Bay Area Ridge Trail - 01 - North Bay
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 63°F 17°C | 41°F 5°C | 0.5 in 14 mm | — | 18 |
| February | 62°F 17°C | 44°F 7°C | 6.9 in 176 mm | — | 6 |
| March | 65°F 18°C | 45°F 7°C | 2.6 in 67 mm | 0.1 in2 mm | 11 |
| April | 72°F 22°C | 48°F 9°C | 0.3 in 7 mm | — | 13 |
| May | 81°F 27°C | 54°F 12°C | 0.1 in 2 mm | — | 26 |
| June | 81°F 27°C | 55°F 13°C | 0.0 in 0 mm | — | 29 |
| July | 80°F 27°C | 56°F 13°C | 0.0 in 1 mm | — | 24 |
| August | 88°F 31°C | 59°F 15°C | 0.0 in 0 mm | — | 29 |
| September | 84°F 29°C | 60°F 16°C | 0.2 in 5 mm | — | 17 |
| October | 75°F 24°C | 53°F 11°C | 1.9 in 47 mm | — | 17 |
| November | 66°F 19°C | 49°F 10°C | 3.2 in 82 mm | — | 5 |
| December | 57°F 14°C | 45°F 7°C | 4.2 in 105 mm | — | 6 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 18 | 0 |
| February | 6 | 4 |
| March | 11 | 2 |
| April | 13 | 0 |
| May | 26 | 0 |
| June | 29 | 0 |
| July | 24 | 0 |
| August | 29 | 0 |
| September | 17 | 0 |
| October | 17 | 1 |
| November | 5 | 4 |
| December | 6 | 4 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 53°F 12°C | 49°F 10°C |
| February | 54°F 12°C | 49°F 10°C |
| March | 55°F 13°C | 52°F 11°C |
| April | 56°F 13°C | 58°F 15°C |
| May | 55°F 13°C | 64°F 18°C |
| June | 57°F 14°C | 67°F 19°C |
| July | 60°F 16°C | 67°F 20°C |
| August | 61°F 16°C | 71°F 22°C |
| September | 62°F 17°C | 72°F 22°C |
| October | 62°F 17°C | 65°F 18°C |
| November | 58°F 14°C | 59°F 15°C |
| December | 56°F 14°C | 53°F 11°C |