Ilwaco, WA vs Seattle, WA

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

Ilwaco is cooler than Seattle (49.8°F vs 53.8°F annual avg) and wetter than it (78.5 in vs 36.5 in per year). Both cities share a Warm-summer Mediterranean climate (Csb).

Ilwaco, WA

Annual avg
49.8°F
Annual precip
78.5 in
Warmest month
August (66.5°F)
Coldest month
February (35.4°F)
Annual swing
17°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

Ilwaco

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 Ilwaco Seattle
High Low Precip High Low Precip
January 48.8°F 35.9°F 12.04 in 48.6°F 36.8°F 5.21 in
February 50.4°F 35.4°F 7.76 in 50.7°F 36.8°F 3.71 in
March 52.4°F 37.3°F 8.71 in 54.8°F 39.4°F 3.94 in
April 55.0°F 40.2°F 6.79 in 59.8°F 43.6°F 2.89 in
May 58.9°F 45.1°F 3.55 in 66.5°F 49.3°F 1.98 in
June 62.0°F 48.9°F 2.58 in 71.2°F 54.0°F 1.22 in
July 65.2°F 51.8°F 1.01 in 77.3°F 57.5°F 0.56 in
August 66.5°F 51.6°F 1.63 in 77.4°F 58.1°F 0.83 in
September 66.0°F 47.9°F 2.66 in 71.7°F 53.9°F 1.37 in
October 59.7°F 42.2°F 8.20 in 61.0°F 46.4°F 3.49 in
November 52.5°F 38.2°F 11.43 in 53.0°F 39.9°F 5.80 in
December 48.2°F 35.8°F 12.15 in 47.8°F 36.2°F 5.49 in
Ilwaco overview
Full climate profile
 Seattle overview
Full climate profile