Walnut Creek, CA vs Seattle, WA

Side-by-side comparison of monthly climate normals (NOAA 1991-2020).

Walnut Creek is warmer than Seattle (62.4°F vs 53.8°F annual avg) and drier than it (17.7 in vs 36.5 in per year). Walnut Creek has a Semi-arid (cold) climate; Seattle a Warm-summer Mediterranean climate.

Walnut Creek, CA

Annual avg
62.4°F
Annual precip
17.7 in
Warmest month
July (88.3°F)
Coldest month
December (41.2°F)
Annual swing
23.6°F
Pleasant months
2 / 12
Semi-arid (cold) BSk USDA Zone 9b

Seattle, WA

Annual avg
53.8°F
Annual precip
36.5 in
Warmest month
August (77.4°F)
Coldest month
December (36.2°F)
Annual swing
25.8°F
Pleasant months
4 / 12
Warm-summer Mediterranean Csb USDA Zone 9a

Best months to visit each city

Walnut Creek

J
F
M
A
M
J
J
A
S
O
N
D

Seattle

J
F
M
A
M
J
J
A
S
O
N
D

Month-by-month comparison

Month Walnut Creek Seattle
High Low Precip High Low Precip
January 58.4°F 41.7°F 3.46 in 48.6°F 36.8°F 5.21 in
February 63.2°F 44.1°F 3.57 in 50.7°F 36.8°F 3.71 in
March 67.7°F 46.8°F 2.57 in 54.8°F 39.4°F 3.94 in
April 72.2°F 49.2°F 1.23 in 59.8°F 43.6°F 2.89 in
May 78.0°F 53.1°F 0.61 in 66.5°F 49.3°F 1.98 in
June 84.6°F 56.7°F 0.12 in 71.2°F 54.0°F 1.22 in
July 88.3°F 58.3°F 0.00 in 77.3°F 57.5°F 0.56 in
August 88.2°F 58.8°F 0.02 in 77.4°F 58.1°F 0.83 in
September 86.1°F 57.6°F 0.06 in 71.7°F 53.9°F 1.37 in
October 78.2°F 53.1°F 0.68 in 61.0°F 46.4°F 3.49 in
November 66.7°F 45.9°F 1.87 in 53.0°F 39.9°F 5.80 in
December 58.7°F 41.2°F 3.55 in 47.8°F 36.2°F 5.49 in
Walnut Creek overview
Full climate profile
 Seattle overview
Full climate profile