Rock River, WY vs Phoenix, AZ

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

Rock River is cooler than Phoenix (42.2°F vs 72.5°F annual avg) and similar rainfall to it (11.2 in vs 8.9 in per year). Rock River has a Semi-arid (cold) climate; Phoenix a Desert (hot) climate.

Rock River, WY

Annual avg
42.2°F
Annual precip
11.2 in
Warmest month
July (85.3°F)
Coldest month
January (10.3°F)
Annual swing
46°F
Semi-arid (cold) BSk USDA Zone 6b

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

Rock River

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 Rock River Phoenix
High Low Precip High Low Precip
January 31.3°F 10.3°F 0.41 in 65.4°F 44.1°F 1.17 in
February 34.8°F 11.5°F 0.63 in 68.1°F 46.1°F 1.21 in
March 45.6°F 18.1°F 0.72 in 75.0°F 50.9°F 1.09 in
April 55.1°F 25.0°F 1.38 in 82.5°F 56.6°F 0.35 in
May 64.8°F 33.3°F 1.74 in 91.5°F 64.7°F 0.19 in
June 77.4°F 42.6°F 1.38 in 101.5°F 72.7°F 0.03 in
July 85.3°F 48.3°F 1.11 in 104.0°F 80.8°F 0.81 in
August 83.0°F 45.9°F 0.82 in 102.5°F 80.5°F 0.96 in
September 73.6°F 36.3°F 0.96 in 97.5°F 74.7°F 0.71 in
October 59.1°F 26.7°F 1.01 in 86.3°F 62.7°F 0.67 in
November 42.8°F 17.6°F 0.55 in 74.0°F 50.8°F 0.90 in
December 32.8°F 10.7°F 0.49 in 63.9°F 42.7°F 0.81 in
Rock River overview
Full climate profile
 Phoenix overview
Full climate profile