Portsmouth, IA vs Phoenix, AZ

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

Portsmouth is cooler than Phoenix (49.5°F vs 72.5°F annual avg) and wetter than it (34.3 in vs 8.9 in per year). Portsmouth has a Hot-summer humid continental climate; Phoenix a Desert (hot) climate.

Portsmouth, IA

Annual avg
49.5°F
Annual precip
34.3 in
Warmest month
July (85.9°F)
Coldest month
January (10.3°F)
Annual swing
54.2°F
Pleasant months
1 / 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

Portsmouth

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 Portsmouth Phoenix
High Low Precip High Low Precip
January 30.7°F 10.3°F 0.90 in 65.4°F 44.1°F 1.17 in
February 35.7°F 13.7°F 0.98 in 68.1°F 46.1°F 1.21 in
March 49.9°F 25.3°F 2.05 in 75.0°F 50.9°F 1.09 in
April 63.3°F 36.4°F 3.34 in 82.5°F 56.6°F 0.35 in
May 74.1°F 49.3°F 4.74 in 91.5°F 64.7°F 0.19 in
June 83.6°F 59.9°F 5.17 in 101.5°F 72.7°F 0.03 in
July 85.9°F 63.6°F 3.72 in 104.0°F 80.8°F 0.81 in
August 84.0°F 60.8°F 4.32 in 102.5°F 80.5°F 0.96 in
September 78.5°F 51.7°F 4.00 in 97.5°F 74.7°F 0.71 in
October 65.4°F 39.1°F 2.37 in 86.3°F 62.7°F 0.67 in
November 49.3°F 25.9°F 1.43 in 74.0°F 50.8°F 0.90 in
December 35.9°F 15.7°F 1.31 in 63.9°F 42.7°F 0.81 in
Portsmouth overview
Full climate profile
 Phoenix overview
Full climate profile