Rapid City, SD vs Seattle, WA

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

Rapid City is cooler than Seattle (48°F vs 53.8°F annual avg) and drier than it (20 in vs 36.5 in per year). Rapid City has a Semi-arid (cold) climate; Seattle a Warm-summer Mediterranean climate.

Rapid City, SD

Annual avg
48°F
Annual precip
20 in
Warmest month
July (84.4°F)
Coldest month
January (16.2°F)
Annual swing
46.6°F
Pleasant months
2 / 12
Semi-arid (cold) BSk USDA Zone 7a

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

Rapid 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 Rapid City Seattle
High Low Precip High Low Precip
January 36.5°F 16.2°F 0.31 in 48.6°F 36.8°F 5.21 in
February 38.3°F 17.5°F 0.53 in 50.7°F 36.8°F 3.71 in
March 47.4°F 25.6°F 0.94 in 54.8°F 39.4°F 3.94 in
April 55.0°F 34.0°F 2.26 in 59.8°F 43.6°F 2.89 in
May 65.3°F 44.6°F 4.12 in 66.5°F 49.3°F 1.98 in
June 76.2°F 54.6°F 3.33 in 71.2°F 54.0°F 1.22 in
July 84.4°F 61.6°F 2.62 in 77.3°F 57.5°F 0.56 in
August 83.4°F 59.9°F 2.17 in 77.4°F 58.1°F 0.83 in
September 74.0°F 50.8°F 1.40 in 71.7°F 53.9°F 1.37 in
October 58.8°F 37.9°F 1.49 in 61.0°F 46.4°F 3.49 in
November 47.0°F 26.6°F 0.48 in 53.0°F 39.9°F 5.80 in
December 37.6°F 18.6°F 0.37 in 47.8°F 36.2°F 5.49 in
Rapid City overview
Full climate profile
 Seattle overview
Full climate profile