Derby, IA vs Phoenix, AZ

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

Derby is cooler than Phoenix (48.3°F vs 72.5°F annual avg) and wetter than it (37.3 in vs 8.9 in per year). Derby has a Hot-summer humid continental climate; Phoenix a Desert (hot) climate.

Derby, IA

Annual avg
48.3°F
Annual precip
37.3 in
Warmest month
July (84.5°F)
Coldest month
January (10.6°F)
Annual swing
52.2°F
Hot-summer humid continental Dfa 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

Derby

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 Derby Phoenix
High Low Precip High Low Precip
January 31.0°F 10.6°F 0.96 in 65.4°F 44.1°F 1.17 in
February 35.7°F 13.7°F 1.40 in 68.1°F 46.1°F 1.21 in
March 48.5°F 24.7°F 1.90 in 75.0°F 50.9°F 1.09 in
April 61.0°F 35.0°F 4.15 in 82.5°F 56.6°F 0.35 in
May 70.7°F 46.6°F 5.39 in 91.5°F 64.7°F 0.19 in
June 80.3°F 57.1°F 4.92 in 101.5°F 72.7°F 0.03 in
July 84.5°F 61.5°F 4.21 in 104.0°F 80.8°F 0.81 in
August 83.1°F 59.0°F 4.40 in 102.5°F 80.5°F 0.96 in
September 76.1°F 49.8°F 3.71 in 97.5°F 74.7°F 0.71 in
October 63.8°F 37.8°F 2.98 in 86.3°F 62.7°F 0.67 in
November 48.6°F 26.1°F 2.03 in 74.0°F 50.8°F 0.90 in
December 36.5°F 16.2°F 1.27 in 63.9°F 42.7°F 0.81 in
Derby overview
Full climate profile
 Phoenix overview
Full climate profile