Walla Walla, WA vs Phoenix, AZ

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

Walla Walla is cooler than Phoenix (54.3°F vs 72.5°F annual avg) and wetter than it (18.7 in vs 8.9 in per year). Walla Walla has a Semi-arid (cold) climate; Phoenix a Desert (hot) climate.

Walla Walla, WA

Annual avg
54.3°F
Annual precip
18.7 in
Warmest month
July (90.1°F)
Coldest month
December (30.2°F)
Annual swing
40.7°F
Pleasant months
2 / 12
Semi-arid (cold) BSk USDA Zone 8b

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

Walla Walla

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 Walla Walla Phoenix
High Low Precip High Low Precip
January 41.9°F 30.7°F 2.10 in 65.4°F 44.1°F 1.17 in
February 46.5°F 32.9°F 1.59 in 68.1°F 46.1°F 1.21 in
March 55.8°F 37.8°F 2.11 in 75.0°F 50.9°F 1.09 in
April 62.5°F 42.5°F 1.98 in 82.5°F 56.6°F 0.35 in
May 71.4°F 49.3°F 2.07 in 91.5°F 64.7°F 0.19 in
June 79.0°F 55.1°F 1.24 in 101.5°F 72.7°F 0.03 in
July 90.1°F 62.4°F 0.47 in 104.0°F 80.8°F 0.81 in
August 88.6°F 61.7°F 0.40 in 102.5°F 80.5°F 0.96 in
September 78.5°F 53.9°F 0.64 in 97.5°F 74.7°F 0.71 in
October 63.4°F 43.9°F 1.66 in 86.3°F 62.7°F 0.67 in
November 49.2°F 35.6°F 2.25 in 74.0°F 50.8°F 0.90 in
December 41.0°F 30.2°F 2.23 in 63.9°F 42.7°F 0.81 in
Walla Walla overview
Full climate profile
 Phoenix overview
Full climate profile