Union, OR vs Phoenix, AZ

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

Union is cooler than Phoenix (49°F vs 72.5°F annual avg) and wetter than it (14.8 in vs 8.9 in per year). Union has a Semi-arid (cold) climate; Phoenix a Desert (hot) climate.

Union, OR

Annual avg
49°F
Annual precip
14.8 in
Warmest month
August (86.9°F)
Coldest month
December (25.1°F)
Annual swing
36.5°F
Semi-arid (cold) BSk USDA Zone 8a

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

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 Phoenix
High Low Precip High Low Precip
January 39.5°F 25.4°F 1.19 in 65.4°F 44.1°F 1.17 in
February 44.5°F 27.0°F 0.93 in 68.1°F 46.1°F 1.21 in
March 52.5°F 30.7°F 1.26 in 75.0°F 50.9°F 1.09 in
April 58.9°F 34.4°F 1.68 in 82.5°F 56.6°F 0.35 in
May 67.5°F 41.4°F 2.47 in 91.5°F 64.7°F 0.19 in
June 74.4°F 46.6°F 1.69 in 101.5°F 72.7°F 0.03 in
July 85.8°F 50.9°F 0.48 in 104.0°F 80.8°F 0.81 in
August 86.9°F 50.0°F 0.46 in 102.5°F 80.5°F 0.96 in
September 77.1°F 42.6°F 0.70 in 97.5°F 74.7°F 0.71 in
October 62.7°F 34.4°F 1.15 in 86.3°F 62.7°F 0.67 in
November 47.9°F 30.5°F 1.53 in 74.0°F 50.8°F 0.90 in
December 39.0°F 25.1°F 1.22 in 63.9°F 42.7°F 0.81 in
Union overview
Full climate profile
 Phoenix overview
Full climate profile