St. Louis, MI vs Seattle, WA

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

St. Louis is cooler than Seattle (47°F vs 53.8°F annual avg) and similar rainfall to it (34.5 in vs 36.5 in per year). St. Louis has a Warm-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

St. Louis, MI

Annual avg
47°F
Annual precip
34.5 in
Warmest month
July (82.2°F)
Coldest month
January (15.0°F)
Annual swing
48.8°F
Pleasant months
1 / 12
Warm-summer humid continental Dfb USDA Zone 7a

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

St. Louis

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 St. Louis Seattle
High Low Precip High Low Precip
January 29.1°F 15.0°F 2.17 in 48.6°F 36.8°F 5.21 in
February 32.0°F 15.4°F 1.76 in 50.7°F 36.8°F 3.71 in
March 42.6°F 23.4°F 2.10 in 54.8°F 39.4°F 3.94 in
April 55.9°F 34.5°F 3.46 in 59.8°F 43.6°F 2.89 in
May 68.5°F 45.6°F 3.73 in 66.5°F 49.3°F 1.98 in
June 78.1°F 55.6°F 3.64 in 71.2°F 54.0°F 1.22 in
July 82.2°F 59.3°F 3.26 in 77.3°F 57.5°F 0.56 in
August 80.1°F 57.8°F 3.71 in 77.4°F 58.1°F 0.83 in
September 72.9°F 49.7°F 2.73 in 71.7°F 53.9°F 1.37 in
October 60.0°F 39.4°F 3.24 in 61.0°F 46.4°F 3.49 in
November 45.8°F 29.7°F 2.66 in 53.0°F 39.9°F 5.80 in
December 34.5°F 21.9°F 2.04 in 47.8°F 36.2°F 5.49 in
St. Louis overview
Full climate profile
 Seattle overview
Full climate profile