Idaho Falls, ID vs Phoenix, AZ

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

Idaho Falls is cooler than Phoenix (46.5°F vs 72.5°F annual avg) and similar rainfall to it (13.5 in vs 8.9 in per year). Idaho Falls has a Semi-arid (cold) climate; Phoenix a Desert (hot) climate.

Idaho Falls, ID

Annual avg
46.5°F
Annual precip
13.5 in
Warmest month
July (86.3°F)
Coldest month
January (16.1°F)
Annual swing
47.6°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

Idaho Falls

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 Idaho Falls Phoenix
High Low Precip High Low Precip
January 30.2°F 16.1°F 1.06 in 65.4°F 44.1°F 1.17 in
February 35.7°F 20.0°F 0.95 in 68.1°F 46.1°F 1.21 in
March 48.2°F 28.5°F 1.26 in 75.0°F 50.9°F 1.09 in
April 57.8°F 34.3°F 1.43 in 82.5°F 56.6°F 0.35 in
May 67.2°F 42.4°F 1.93 in 91.5°F 64.7°F 0.19 in
June 76.6°F 48.7°F 1.25 in 101.5°F 72.7°F 0.03 in
July 86.3°F 55.2°F 0.51 in 104.0°F 80.8°F 0.81 in
August 85.5°F 53.6°F 0.65 in 102.5°F 80.5°F 0.96 in
September 74.9°F 45.3°F 1.13 in 97.5°F 74.7°F 0.71 in
October 59.4°F 34.8°F 1.23 in 86.3°F 62.7°F 0.67 in
November 43.0°F 25.1°F 0.95 in 74.0°F 50.8°F 0.90 in
December 30.8°F 17.2°F 1.14 in 63.9°F 42.7°F 0.81 in
Idaho Falls overview
Full climate profile
 Phoenix overview
Full climate profile