Seattle, WA vs Phoenix, AZ

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

Seattle is cooler than Phoenix (53.8°F vs 72.5°F annual avg) and wetter than it (36.5 in vs 8.9 in per year). Seattle has a Warm-summer Mediterranean climate; Phoenix a Desert (hot) climate.

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

Phoenix, AZ

Annual avg
72.5°F
Annual precip
8.9 in
Warmest month
July (104.0°F)
Coldest month
December (42.7°F)
Annual swing
39.1°F
Pleasant months
2 / 12
Desert (hot) BWh USDA Zone 9b

Best months to visit each city

Seattle

J
F
M
A
M
J
J
A
S
O
N
D

Phoenix

J
F
M
A
M
J
J
A
S
O
N
D

Month-by-month comparison

Month Seattle Phoenix
High Low Precip High Low Precip
January 48.6°F 36.8°F 5.21 in 65.4°F 44.1°F 1.17 in
February 50.7°F 36.8°F 3.71 in 68.1°F 46.1°F 1.21 in
March 54.8°F 39.4°F 3.94 in 75.0°F 50.9°F 1.09 in
April 59.8°F 43.6°F 2.89 in 82.5°F 56.6°F 0.35 in
May 66.5°F 49.3°F 1.98 in 91.5°F 64.7°F 0.19 in
June 71.2°F 54.0°F 1.22 in 101.5°F 72.7°F 0.03 in
July 77.3°F 57.5°F 0.56 in 104.0°F 80.8°F 0.81 in
August 77.4°F 58.1°F 0.83 in 102.5°F 80.5°F 0.96 in
September 71.7°F 53.9°F 1.37 in 97.5°F 74.7°F 0.71 in
October 61.0°F 46.4°F 3.49 in 86.3°F 62.7°F 0.67 in
November 53.0°F 39.9°F 5.80 in 74.0°F 50.8°F 0.90 in
December 47.8°F 36.2°F 5.49 in 63.9°F 42.7°F 0.81 in
Seattle overview
Full climate profile
 Phoenix overview
Full climate profile