Mount Prospect, IL vs Seattle, WA

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

Mount Prospect is cooler than Seattle (50.8°F vs 53.8°F annual avg) and similar rainfall to it (32.3 in vs 36.5 in per year). Mount Prospect has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Mount Prospect, IL

Annual avg
50.8°F
Annual precip
32.3 in
Warmest month
July (84.0°F)
Coldest month
January (18.4°F)
Annual swing
49.8°F
Pleasant months
2 / 12
Hot-summer humid continental Dfa 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

Mount Prospect

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 Prospect Seattle
High Low Precip High Low Precip
January 31.9°F 18.4°F 1.33 in 48.6°F 36.8°F 5.21 in
February 35.8°F 21.2°F 1.28 in 50.7°F 36.8°F 3.71 in
March 46.7°F 30.2°F 1.84 in 54.8°F 39.4°F 3.94 in
April 58.1°F 39.3°F 3.31 in 59.8°F 43.6°F 2.89 in
May 69.5°F 49.7°F 3.76 in 66.5°F 49.3°F 1.98 in
June 79.5°F 60.1°F 3.97 in 71.2°F 54.0°F 1.22 in
July 84.0°F 65.8°F 3.15 in 77.3°F 57.5°F 0.56 in
August 82.0°F 64.7°F 3.70 in 77.4°F 58.1°F 0.83 in
September 75.3°F 56.3°F 3.04 in 71.7°F 53.9°F 1.37 in
October 62.5°F 44.5°F 3.11 in 61.0°F 46.4°F 3.49 in
November 48.5°F 33.4°F 2.15 in 53.0°F 39.9°F 5.80 in
December 36.9°F 24.0°F 1.64 in 47.8°F 36.2°F 5.49 in
Mount Prospect overview
Full climate profile
 Seattle overview
Full climate profile