Walnut Creek, California Climate
United States
Pop. 68,910 Elev. 54 m / 177 ft
TZ: America/Los_Angeles (UTC-7) ·
Walnut Creek is largely arid, with warm summers peaking at 84°F (29°C) in August and cool winters around 41°F (5°C) in January. Precipitation occurs on roughly 25 days per year (14.9 in / 379 mm total). The city averages 180 sunny days per year. Ocean water temperatures reach 62°F (17°C) in summer.
| Temperature | 84°F (29°C) high | 41°F (5°C) low |
| Feels like | 88°F (31°C) high | 41°F (5°C) low |
| Rain | 25 days | 14.9 in (379 mm) /yr |
| Sky | 180 sunny | 13 stormy |
| Wind | 5.2 mph (2.3 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 (%)
41
Jan 65
Feb 59
Mar 48
Apr 25
May 20
Jun 33
Jul 21
Aug 38
Sep 43
Oct 70
Nov 69
Dec Humidity (%)
66
Jan 75
Feb 72
Mar 68
Apr 58
May 64
Jun 69
Jul 64
Aug 68
Sep 71
Oct 83
Nov 86
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 6 mi Buchanan Field (CCR)
Ski resort 116 mi Bear Valley Adventure Company
National park 16 mi Rosie the Riveter/World War II Home Front National Historical Park
Mountain peak
(6,113 ft) 100 mi Goat Mountain
Hospital 1 mi Walnut Creek Medical Center
Hiking trail 2 mi Briones to Mt. Diablo Regional Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 61°F 16°C | 41°F 5°C | 0.4 in 11 mm | — | 15 |
| February | 62°F 17°C | 45°F 7°C | 5.0 in 126 mm | — | 6 |
| March | 65°F 18°C | 46°F 8°C | 2.5 in 63 mm | — | 10 |
| April | 71°F 22°C | 49°F 9°C | 0.3 in 9 mm | — | 12 |
| May | 79°F 26°C | 53°F 12°C | 0.1 in 2 mm | — | 24 |
| June | 78°F 26°C | 54°F 12°C | 0.0 in 0 mm | — | 25 |
| July | 77°F 25°C | 56°F 13°C | 0.0 in 0 mm | — | 21 |
| August | 84°F 29°C | 58°F 14°C | 0.0 in 1 mm | — | 26 |
| September | 83°F 28°C | 61°F 16°C | 0.1 in 3 mm | — | 18 |
| October | 74°F 23°C | 54°F 12°C | 1.5 in 38 mm | — | 16 |
| November | 65°F 18°C | 50°F 10°C | 2.8 in 72 mm | — | 5 |
| December | 56°F 13°C | 45°F 7°C | 2.2 in 55 mm | — | 2 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 15 | 0 |
| February | 6 | 3 |
| March | 10 | 3 |
| April | 12 | 1 |
| May | 24 | 0 |
| June | 25 | 0 |
| July | 21 | 0 |
| August | 26 | 0 |
| September | 18 | 0 |
| October | 16 | 1 |
| November | 5 | 3 |
| December | 2 | 2 |
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 | 51°F 10°C |
| March | 55°F 13°C | 54°F 12°C |
| April | 56°F 13°C | 59°F 15°C |
| May | 55°F 13°C | 63°F 17°C |
| June | 57°F 14°C | 65°F 18°C |
| July | 60°F 16°C | 66°F 19°C |
| August | 61°F 16°C | 69°F 21°C |
| September | 62°F 17°C | 71°F 21°C |
| October | 62°F 17°C | 64°F 18°C |
| November | 58°F 14°C | 59°F 15°C |
| December | 56°F 14°C | 52°F 11°C |