Altona, IL vs Seattle, WA

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

Altona is cooler than Seattle (49°F vs 53.8°F annual avg) and similar rainfall to it (39.4 in vs 36.5 in per year). Altona has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Altona, IL

Annual avg
49°F
Annual precip
39.4 in
Warmest month
July (83.4°F)
Coldest month
January (13.0°F)
Annual swing
51.2°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

Altona

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 Altona Seattle
High Low Precip High Low Precip
January 29.9°F 13.0°F 1.82 in 48.6°F 36.8°F 5.21 in
February 35.3°F 15.8°F 2.07 in 50.7°F 36.8°F 3.71 in
March 48.1°F 26.5°F 2.58 in 54.8°F 39.4°F 3.94 in
April 61.5°F 36.9°F 4.00 in 59.8°F 43.6°F 2.89 in
May 72.0°F 49.2°F 5.21 in 66.5°F 49.3°F 1.98 in
June 80.5°F 58.9°F 4.72 in 71.2°F 54.0°F 1.22 in
July 83.4°F 61.8°F 3.98 in 77.3°F 57.5°F 0.56 in
August 81.9°F 59.3°F 3.76 in 77.4°F 58.1°F 0.83 in
September 76.3°F 51.6°F 3.81 in 71.7°F 53.9°F 1.37 in
October 63.9°F 39.8°F 2.77 in 61.0°F 46.4°F 3.49 in
November 48.5°F 28.1°F 2.56 in 53.0°F 39.9°F 5.80 in
December 35.4°F 18.7°F 2.10 in 47.8°F 36.2°F 5.49 in
Altona overview
Full climate profile
 Seattle overview
Full climate profile