Castle Rock, CO vs Phoenix, AZ

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

Castle Rock is cooler than Phoenix (49.5°F vs 72.5°F annual avg) and wetter than it (17.6 in vs 8.9 in per year). Castle Rock has a Semi-arid (cold) climate; Phoenix a Desert (hot) climate.

Castle Rock, CO

Annual avg
49.5°F
Annual precip
17.6 in
Warmest month
July (85.7°F)
Coldest month
January (18.0°F)
Annual swing
39.3°F
Semi-arid (cold) BSk USDA Zone 7a

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

Castle Rock

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 Castle Rock Phoenix
High Low Precip High Low Precip
January 45.6°F 18.0°F 0.55 in 65.4°F 44.1°F 1.17 in
February 46.7°F 19.9°F 0.70 in 68.1°F 46.1°F 1.21 in
March 53.8°F 26.5°F 1.54 in 75.0°F 50.9°F 1.09 in
April 59.1°F 32.5°F 2.08 in 82.5°F 56.6°F 0.35 in
May 68.4°F 41.6°F 1.97 in 91.5°F 64.7°F 0.19 in
June 80.2°F 50.5°F 2.20 in 101.5°F 72.7°F 0.03 in
July 85.7°F 56.4°F 2.32 in 104.0°F 80.8°F 0.81 in
August 83.6°F 54.7°F 2.52 in 102.5°F 80.5°F 0.96 in
September 76.7°F 46.6°F 1.39 in 97.5°F 74.7°F 0.71 in
October 64.8°F 34.6°F 0.85 in 86.3°F 62.7°F 0.67 in
November 53.9°F 25.7°F 0.79 in 74.0°F 50.8°F 0.90 in
December 45.7°F 18.0°F 0.69 in 63.9°F 42.7°F 0.81 in
Castle Rock overview
Full climate profile
 Phoenix overview
Full climate profile