Friday Harbor, WA vs Seattle, WA

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

Friday Harbor is cooler than Seattle (50.9°F vs 53.8°F annual avg) and drier than it (18.5 in vs 36.5 in per year). Both cities share a Warm-summer Mediterranean climate (Csb).

Friday Harbor, WA

Annual avg
50.9°F
Annual precip
18.5 in
Warmest month
August (73.3°F)
Coldest month
February (36.5°F)
Annual swing
20°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

Friday Harbor

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 Friday Harbor Seattle
High Low Precip High Low Precip
January 47.1°F 37.1°F 2.69 in 48.6°F 36.8°F 5.21 in
February 48.5°F 36.5°F 1.54 in 50.7°F 36.8°F 3.71 in
March 52.6°F 38.4°F 1.35 in 54.8°F 39.4°F 3.94 in
April 57.4°F 40.7°F 1.01 in 59.8°F 43.6°F 2.89 in
May 63.7°F 44.3°F 1.14 in 66.5°F 49.3°F 1.98 in
June 68.4°F 48.1°F 0.75 in 71.2°F 54.0°F 1.22 in
July 72.4°F 50.0°F 0.48 in 77.3°F 57.5°F 0.56 in
August 73.3°F 50.0°F 0.70 in 77.4°F 58.1°F 0.83 in
September 68.1°F 47.9°F 1.04 in 71.7°F 53.9°F 1.37 in
October 58.5°F 44.0°F 2.34 in 61.0°F 46.4°F 3.49 in
November 51.0°F 39.8°F 2.98 in 53.0°F 39.9°F 5.80 in
December 46.3°F 36.8°F 2.45 in 47.8°F 36.2°F 5.49 in
Friday Harbor overview
Full climate profile
 Seattle overview
Full climate profile