Petersburg, IL vs Phoenix, AZ

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

Petersburg is cooler than Phoenix (52.3°F vs 72.5°F annual avg) and wetter than it (37.7 in vs 8.9 in per year). Petersburg has a Hot-summer humid continental climate; Phoenix a Desert (hot) climate.

Petersburg, IL

Annual avg
52.3°F
Annual precip
37.7 in
Warmest month
July (85.5°F)
Coldest month
January (17.3°F)
Annual swing
49.6°F
Pleasant months
2 / 12
Hot-summer humid continental Dfa 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

Petersburg

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 Petersburg Phoenix
High Low Precip High Low Precip
January 34.4°F 17.3°F 2.02 in 65.4°F 44.1°F 1.17 in
February 39.3°F 20.5°F 1.75 in 68.1°F 46.1°F 1.21 in
March 50.8°F 30.3°F 2.51 in 75.0°F 50.9°F 1.09 in
April 63.7°F 41.3°F 4.09 in 82.5°F 56.6°F 0.35 in
May 73.7°F 53.3°F 4.61 in 91.5°F 64.7°F 0.19 in
June 82.2°F 62.3°F 4.14 in 101.5°F 72.7°F 0.03 in
July 85.5°F 65.4°F 3.87 in 104.0°F 80.8°F 0.81 in
August 84.5°F 62.7°F 3.66 in 102.5°F 80.5°F 0.96 in
September 78.8°F 54.9°F 3.12 in 97.5°F 74.7°F 0.71 in
October 66.3°F 43.0°F 3.19 in 86.3°F 62.7°F 0.67 in
November 51.5°F 32.1°F 2.76 in 74.0°F 50.8°F 0.90 in
December 39.1°F 22.6°F 1.93 in 63.9°F 42.7°F 0.81 in
Petersburg overview
Full climate profile
 Phoenix overview
Full climate profile