Harper, IA vs Seattle, WA

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

Harper is cooler than Seattle (48.9°F vs 53.8°F annual avg) and similar rainfall to it (37.4 in vs 36.5 in per year). Harper has a Hot-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Harper, IA

Annual avg
48.9°F
Annual precip
37.4 in
Warmest month
July (84.6°F)
Coldest month
January (11.5°F)
Annual swing
52.9°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

Harper

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 Harper Seattle
High Low Precip High Low Precip
January 29.8°F 11.5°F 1.18 in 48.6°F 36.8°F 5.21 in
February 34.6°F 15.1°F 1.47 in 50.7°F 36.8°F 3.71 in
March 47.6°F 26.3°F 2.34 in 54.8°F 39.4°F 3.94 in
April 60.7°F 37.2°F 3.70 in 59.8°F 43.6°F 2.89 in
May 71.0°F 49.1°F 4.95 in 66.5°F 49.3°F 1.98 in
June 80.6°F 59.1°F 5.11 in 71.2°F 54.0°F 1.22 in
July 84.6°F 62.7°F 3.93 in 77.3°F 57.5°F 0.56 in
August 82.8°F 60.4°F 4.76 in 77.4°F 58.1°F 0.83 in
September 76.4°F 51.7°F 3.47 in 71.7°F 53.9°F 1.37 in
October 63.4°F 39.8°F 2.78 in 61.0°F 46.4°F 3.49 in
November 48.2°F 27.7°F 2.18 in 53.0°F 39.9°F 5.80 in
December 35.3°F 17.7°F 1.54 in 47.8°F 36.2°F 5.49 in
Harper overview
Full climate profile
 Seattle overview
Full climate profile