Union Gap, WA vs Phoenix, AZ

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

Union Gap is cooler than Phoenix (50.8°F vs 72.5°F annual avg) and similar rainfall to it (8 in vs 8.9 in per year). Union Gap has a Desert (cold) climate; Phoenix a Desert (hot) climate.

Union Gap, WA

Annual avg
50.8°F
Annual precip
8 in
Warmest month
July (89.9°F)
Coldest month
December (23.1°F)
Annual swing
41.8°F
Desert (cold) BWk USDA Zone 7b

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

Union Gap

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 Union Gap Phoenix
High Low Precip High Low Precip
January 39.5°F 24.0°F 1.19 in 65.4°F 44.1°F 1.17 in
February 47.2°F 26.1°F 0.81 in 68.1°F 46.1°F 1.21 in
March 56.6°F 30.2°F 0.64 in 75.0°F 50.9°F 1.09 in
April 64.7°F 35.2°F 0.55 in 82.5°F 56.6°F 0.35 in
May 74.1°F 43.5°F 0.74 in 91.5°F 64.7°F 0.19 in
June 80.7°F 49.5°F 0.50 in 101.5°F 72.7°F 0.03 in
July 89.9°F 55.0°F 0.20 in 104.0°F 80.8°F 0.81 in
August 88.5°F 53.3°F 0.21 in 102.5°F 80.5°F 0.96 in
September 79.4°F 44.9°F 0.23 in 97.5°F 74.7°F 0.71 in
October 64.4°F 35.3°F 0.64 in 86.3°F 62.7°F 0.67 in
November 48.9°F 27.2°F 0.86 in 74.0°F 50.8°F 0.90 in
December 38.2°F 23.1°F 1.44 in 63.9°F 42.7°F 0.81 in
Union Gap overview
Full climate profile
 Phoenix overview
Full climate profile