Shell Rock, IA vs Seattle, WA

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

Shell Rock is cooler than Seattle (46.7°F vs 53.8°F annual avg) and similar rainfall to it (35.4 in vs 36.5 in per year). Shell Rock has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Shell Rock, IA

Annual avg
46.7°F
Annual precip
35.4 in
Warmest month
July (82.7°F)
Coldest month
January (7.5°F)
Annual swing
56.5°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

Shell Rock

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 Shell Rock Seattle
High Low Precip High Low Precip
January 25.0°F 7.5°F 0.94 in 48.6°F 36.8°F 5.21 in
February 29.4°F 11.5°F 1.04 in 50.7°F 36.8°F 3.71 in
March 43.4°F 24.1°F 1.79 in 54.8°F 39.4°F 3.94 in
April 58.5°F 35.9°F 3.81 in 59.8°F 43.6°F 2.89 in
May 70.2°F 48.6°F 5.13 in 66.5°F 49.3°F 1.98 in
June 79.8°F 59.3°F 5.46 in 71.2°F 54.0°F 1.22 in
July 82.7°F 62.8°F 4.20 in 77.3°F 57.5°F 0.56 in
August 80.4°F 60.2°F 4.04 in 77.4°F 58.1°F 0.83 in
September 74.3°F 51.2°F 3.37 in 71.7°F 53.9°F 1.37 in
October 61.0°F 39.0°F 2.51 in 61.0°F 46.4°F 3.49 in
November 44.3°F 25.4°F 1.76 in 53.0°F 39.9°F 5.80 in
December 30.5°F 14.6°F 1.35 in 47.8°F 36.2°F 5.49 in
Shell Rock overview
Full climate profile
 Seattle overview
Full climate profile