Castlewood, SD vs Seattle, WA

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

Castlewood is cooler than Seattle (42.7°F vs 53.8°F annual avg) and drier than it (24.3 in vs 36.5 in per year). Castlewood has a Warm-summer humid continental climate; Seattle a Warm-summer Mediterranean climate.

Castlewood, SD

Annual avg
42.7°F
Annual precip
24.3 in
Warmest month
July (82.5°F)
Coldest month
January (2.5°F)
Annual swing
58.5°F
Pleasant months
1 / 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

Castlewood

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 Castlewood Seattle
High Low Precip High Low Precip
January 21.5°F 2.5°F 0.52 in 48.6°F 36.8°F 5.21 in
February 26.2°F 5.9°F 0.58 in 50.7°F 36.8°F 3.71 in
March 38.7°F 17.8°F 1.12 in 54.8°F 39.4°F 3.94 in
April 54.1°F 29.6°F 2.13 in 59.8°F 43.6°F 2.89 in
May 67.3°F 43.6°F 3.18 in 66.5°F 49.3°F 1.98 in
June 77.5°F 54.2°F 3.97 in 71.2°F 54.0°F 1.22 in
July 82.5°F 58.5°F 3.49 in 77.3°F 57.5°F 0.56 in
August 80.5°F 56.1°F 3.08 in 77.4°F 58.1°F 0.83 in
September 72.4°F 47.3°F 2.69 in 71.7°F 53.9°F 1.37 in
October 57.8°F 33.7°F 2.28 in 61.0°F 46.4°F 3.49 in
November 41.0°F 20.7°F 0.76 in 53.0°F 39.9°F 5.80 in
December 26.9°F 8.7°F 0.53 in 47.8°F 36.2°F 5.49 in
Castlewood overview
Full climate profile
 Seattle overview
Full climate profile