Littleton, IL vs Seattle, WA

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

Littleton is cooler than Seattle (51.7°F vs 53.8°F annual avg) and similar rainfall to it (40.9 in vs 36.5 in per year). Littleton has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Littleton, IL

Annual avg
51.7°F
Annual precip
40.9 in
Warmest month
July (84.5°F)
Coldest month
January (17.0°F)
Annual swing
49.9°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

Littleton

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 Littleton Seattle
High Low Precip High Low Precip
January 32.9°F 17.0°F 1.78 in 48.6°F 36.8°F 5.21 in
February 38.1°F 21.0°F 2.09 in 50.7°F 36.8°F 3.71 in
March 49.8°F 30.7°F 2.60 in 54.8°F 39.4°F 3.94 in
April 62.3°F 41.5°F 3.88 in 59.8°F 43.6°F 2.89 in
May 72.2°F 52.4°F 5.33 in 66.5°F 49.3°F 1.98 in
June 81.0°F 61.6°F 5.01 in 71.2°F 54.0°F 1.22 in
July 84.5°F 65.2°F 4.03 in 77.3°F 57.5°F 0.56 in
August 83.2°F 63.1°F 3.75 in 77.4°F 58.1°F 0.83 in
September 77.0°F 55.3°F 3.92 in 71.7°F 53.9°F 1.37 in
October 64.8°F 43.6°F 3.43 in 61.0°F 46.4°F 3.49 in
November 50.3°F 32.5°F 2.67 in 53.0°F 39.9°F 5.80 in
December 38.5°F 22.8°F 2.41 in 47.8°F 36.2°F 5.49 in
Littleton overview
Full climate profile
 Seattle overview
Full climate profile