Wilsonville, OR vs Seattle, WA

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

Wilsonville is about the same temperature as Seattle (53.9°F vs 53.8°F annual avg) and wetter than it (42.4 in vs 36.5 in per year). Both cities share a Warm-summer Mediterranean climate (Csb).

Wilsonville, OR

Annual avg
53.9°F
Annual precip
42.4 in
Warmest month
August (82.2°F)
Coldest month
December (35.5°F)
Annual swing
27.4°F
Pleasant months
2 / 12
Warm-summer Mediterranean Csb USDA Zone 9a

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

Wilsonville

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 Wilsonville Seattle
High Low Precip High Low Precip
January 47.2°F 36.4°F 6.12 in 48.6°F 36.8°F 5.21 in
February 51.6°F 36.6°F 4.20 in 50.7°F 36.8°F 3.71 in
March 55.7°F 38.9°F 4.92 in 54.8°F 39.4°F 3.94 in
April 60.2°F 42.1°F 3.28 in 59.8°F 43.6°F 2.89 in
May 67.7°F 47.1°F 2.44 in 66.5°F 49.3°F 1.98 in
June 73.7°F 51.7°F 1.59 in 71.2°F 54.0°F 1.22 in
July 81.7°F 55.5°F 0.45 in 77.3°F 57.5°F 0.56 in
August 82.2°F 55.3°F 0.53 in 77.4°F 58.1°F 0.83 in
September 76.2°F 51.3°F 1.73 in 71.7°F 53.9°F 1.37 in
October 63.5°F 44.6°F 4.27 in 61.0°F 46.4°F 3.49 in
November 52.4°F 39.2°F 6.25 in 53.0°F 39.9°F 5.80 in
December 47.0°F 35.5°F 6.60 in 47.8°F 36.2°F 5.49 in
Wilsonville overview
Full climate profile
 Seattle overview
Full climate profile