Mount Vernon, WA vs Seattle, WA

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

Mount Vernon is cooler than Seattle (51.4°F vs 53.8°F annual avg) and drier than it (0 in vs 36.5 in per year). Mount Vernon has a Desert (cold) climate; Seattle a Warm-summer Mediterranean climate.

Mount Vernon, WA

Annual avg
51.4°F
Annual precip
0 in
Warmest month
August (75.1°F)
Coldest month
February (34.9°F)
Annual swing
23.5°F
Pleasant months
3 / 12
Desert (cold) BWk USDA Zone 8b

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

Mount Vernon

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 Mount Vernon Seattle
High Low Precip High Low Precip
January 47.1°F 35.0°F — in 48.6°F 36.8°F 5.21 in
February 49.6°F 34.9°F — in 50.7°F 36.8°F 3.71 in
March 53.7°F 38.0°F — in 54.8°F 39.4°F 3.94 in
April 58.4°F 41.3°F — in 59.8°F 43.6°F 2.89 in
May 64.8°F 46.6°F — in 66.5°F 49.3°F 1.98 in
June 68.7°F 50.7°F — in 71.2°F 54.0°F 1.22 in
July 73.3°F 53.5°F — in 77.3°F 57.5°F 0.56 in
August 75.1°F 53.2°F — in 77.4°F 58.1°F 0.83 in
September 68.8°F 48.6°F — in 71.7°F 53.9°F 1.37 in
October 59.3°F 43.2°F — in 61.0°F 46.4°F 3.49 in
November 51.2°F 38.8°F — in 53.0°F 39.9°F 5.80 in
December 45.9°F 35.3°F — in 47.8°F 36.2°F 5.49 in
Mount Vernon overview
Full climate profile
 Seattle overview
Full climate profile