Rockwell City, IA vs Seattle, WA

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

Rockwell City is cooler than Seattle (47.2°F vs 53.8°F annual avg) and similar rainfall to it (33.8 in vs 36.5 in per year). Rockwell City has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Rockwell City, IA

Annual avg
47.2°F
Annual precip
33.8 in
Warmest month
July (82.9°F)
Coldest month
January (8.4°F)
Annual swing
55.5°F
Pleasant months
2 / 12
Hot-summer humid continental Dfa USDA Zone 6a

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

Rockwell City

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 Rockwell City Seattle
High Low Precip High Low Precip
January 26.5°F 8.4°F 0.76 in 48.6°F 36.8°F 5.21 in
February 31.4°F 12.3°F 0.99 in 50.7°F 36.8°F 3.71 in
March 45.1°F 24.4°F 1.99 in 54.8°F 39.4°F 3.94 in
April 59.2°F 35.6°F 3.76 in 59.8°F 43.6°F 2.89 in
May 70.0°F 48.7°F 5.02 in 66.5°F 49.3°F 1.98 in
June 79.6°F 59.5°F 5.04 in 71.2°F 54.0°F 1.22 in
July 82.9°F 62.9°F 3.54 in 77.3°F 57.5°F 0.56 in
August 80.7°F 60.5°F 4.53 in 77.4°F 58.1°F 0.83 in
September 75.0°F 51.1°F 2.95 in 71.7°F 53.9°F 1.37 in
October 62.2°F 38.4°F 2.35 in 61.0°F 46.4°F 3.49 in
November 45.8°F 25.4°F 1.48 in 53.0°F 39.9°F 5.80 in
December 32.0°F 14.8°F 1.34 in 47.8°F 36.2°F 5.49 in
Rockwell City overview
Full climate profile
 Seattle overview
Full climate profile