Swea City, IA vs Seattle, WA

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

Swea City is cooler than Seattle (43.8°F vs 53.8°F annual avg) and similar rainfall to it (32.9 in vs 36.5 in per year). Swea City has a Warm-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Swea City, IA

Annual avg
43.8°F
Annual precip
32.9 in
Warmest month
July (80.8°F)
Coldest month
January (4.5°F)
Annual swing
57.1°F
Pleasant months
2 / 12
Warm-summer humid continental Dfb USDA Zone 5b

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

Swea 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 Swea City Seattle
High Low Precip High Low Precip
January 21.9°F 4.5°F 0.87 in 48.6°F 36.8°F 5.21 in
February 26.9°F 8.1°F 0.93 in 50.7°F 36.8°F 3.71 in
March 39.7°F 21.4°F 1.76 in 54.8°F 39.4°F 3.94 in
April 55.4°F 32.5°F 3.43 in 59.8°F 43.6°F 2.89 in
May 67.7°F 45.6°F 4.60 in 66.5°F 49.3°F 1.98 in
June 77.8°F 56.9°F 4.65 in 71.2°F 54.0°F 1.22 in
July 80.8°F 59.8°F 4.16 in 77.3°F 57.5°F 0.56 in
August 78.3°F 57.5°F 4.11 in 77.4°F 58.1°F 0.83 in
September 72.6°F 48.0°F 3.21 in 71.7°F 53.9°F 1.37 in
October 58.7°F 35.2°F 2.52 in 61.0°F 46.4°F 3.49 in
November 41.9°F 22.1°F 1.46 in 53.0°F 39.9°F 5.80 in
December 27.6°F 11.2°F 1.17 in 47.8°F 36.2°F 5.49 in
Swea City overview
Full climate profile
 Seattle overview
Full climate profile