Old Mill Creek, IL vs Phoenix, AZ

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

Old Mill Creek is cooler than Phoenix (48.6°F vs 72.5°F annual avg) and wetter than it (37.8 in vs 8.9 in per year). Old Mill Creek has a Hot-summer humid continental climate; Phoenix a Desert (hot) climate.

Old Mill Creek, IL

Annual avg
48.6°F
Annual precip
37.8 in
Warmest month
July (82.3°F)
Coldest month
January (14.6°F)
Annual swing
50.5°F
Pleasant months
2 / 12
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

Old Mill Creek

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 Old Mill Creek Phoenix
High Low Precip High Low Precip
January 29.9°F 14.6°F 2.07 in 65.4°F 44.1°F 1.17 in
February 34.0°F 17.5°F 1.89 in 68.1°F 46.1°F 1.21 in
March 44.8°F 26.6°F 2.64 in 75.0°F 50.9°F 1.09 in
April 56.8°F 37.1°F 4.12 in 82.5°F 56.6°F 0.35 in
May 68.8°F 47.8°F 4.44 in 91.5°F 64.7°F 0.19 in
June 78.4°F 57.9°F 4.20 in 101.5°F 72.7°F 0.03 in
July 82.3°F 63.1°F 3.92 in 104.0°F 80.8°F 0.81 in
August 80.6°F 61.8°F 3.27 in 102.5°F 80.5°F 0.96 in
September 73.4°F 54.4°F 3.36 in 97.5°F 74.7°F 0.71 in
October 60.4°F 43.1°F 3.04 in 86.3°F 62.7°F 0.67 in
November 47.1°F 30.9°F 2.54 in 74.0°F 50.8°F 0.90 in
December 35.0°F 20.8°F 2.28 in 63.9°F 42.7°F 0.81 in
Old Mill Creek overview
Full climate profile
 Phoenix overview
Full climate profile