LaSalle, IL vs Seattle, WA

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

LaSalle is cooler than Seattle (49.6°F vs 53.8°F annual avg) and similar rainfall to it (38.1 in vs 36.5 in per year). LaSalle has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

LaSalle, IL

Annual avg
49.6°F
Annual precip
38.1 in
Warmest month
July (84.0°F)
Coldest month
January (14.0°F)
Annual swing
51.4°F
Pleasant months
1 / 12
Hot-summer humid continental Dfa USDA Zone 6b

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

LaSalle

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 LaSalle Seattle
High Low Precip High Low Precip
January 30.0°F 14.0°F 1.81 in 48.6°F 36.8°F 5.21 in
February 34.5°F 17.6°F 1.77 in 50.7°F 36.8°F 3.71 in
March 47.5°F 27.3°F 2.28 in 54.8°F 39.4°F 3.94 in
April 60.9°F 37.7°F 3.77 in 59.8°F 43.6°F 2.89 in
May 72.5°F 49.2°F 4.49 in 66.5°F 49.3°F 1.98 in
June 81.3°F 59.4°F 4.62 in 71.2°F 54.0°F 1.22 in
July 84.0°F 62.8°F 3.89 in 77.3°F 57.5°F 0.56 in
August 82.2°F 60.8°F 3.70 in 77.4°F 58.1°F 0.83 in
September 76.9°F 52.6°F 3.41 in 71.7°F 53.9°F 1.37 in
October 63.9°F 41.1°F 3.50 in 61.0°F 46.4°F 3.49 in
November 48.4°F 30.0°F 2.71 in 53.0°F 39.9°F 5.80 in
December 35.5°F 19.9°F 2.10 in 47.8°F 36.2°F 5.49 in
LaSalle overview
Full climate profile
 Seattle overview
Full climate profile