Roy, UT vs Phoenix, AZ

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

Roy is cooler than Phoenix (51.7°F vs 72.5°F annual avg) and wetter than it (16.4 in vs 8.9 in per year). Roy has a Semi-arid (cold) climate; Phoenix a Desert (hot) climate.

Roy, UT

Annual avg
51.7°F
Annual precip
16.4 in
Warmest month
July (91.3°F)
Coldest month
January (21.2°F)
Annual swing
49.5°F
Pleasant months
1 / 12
Semi-arid (cold) BSk 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

Roy

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 Roy Phoenix
High Low Precip High Low Precip
January 35.7°F 21.2°F 1.53 in 65.4°F 44.1°F 1.17 in
February 41.9°F 24.9°F 1.55 in 68.1°F 46.1°F 1.21 in
March 52.7°F 33.1°F 1.71 in 75.0°F 50.9°F 1.09 in
April 59.6°F 38.6°F 1.97 in 82.5°F 56.6°F 0.35 in
May 70.1°F 47.1°F 2.17 in 91.5°F 64.7°F 0.19 in
June 81.5°F 55.3°F 1.12 in 101.5°F 72.7°F 0.03 in
July 91.3°F 64.8°F 0.35 in 104.0°F 80.8°F 0.81 in
August 88.7°F 62.9°F 0.72 in 102.5°F 80.5°F 0.96 in
September 77.8°F 53.0°F 1.06 in 97.5°F 74.7°F 0.71 in
October 62.7°F 40.8°F 1.68 in 86.3°F 62.7°F 0.67 in
November 48.5°F 30.5°F 1.17 in 74.0°F 50.8°F 0.90 in
December 36.8°F 22.4°F 1.33 in 63.9°F 42.7°F 0.81 in
Roy overview
Full climate profile
 Phoenix overview
Full climate profile