Key Biscayne, FL vs Phoenix, AZ

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

Key Biscayne is warmer than Phoenix (78.7°F vs 72.5°F annual avg) and wetter than it (55.3 in vs 8.9 in per year). Key Biscayne has a Tropical monsoon climate; Phoenix a Desert (hot) climate.

Key Biscayne, FL

Annual avg
78.7°F
Annual precip
55.3 in
Warmest month
August (91.4°F)
Coldest month
January (62.8°F)
Annual swing
15.3°F
Pleasant months
3 / 12
Tropical monsoon Am USDA Zone 11b

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

Key Biscayne

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 Key Biscayne Phoenix
High Low Precip High Low Precip
January 77.5°F 62.8°F 2.44 in 65.4°F 44.1°F 1.17 in
February 78.9°F 64.8°F 2.00 in 68.1°F 46.1°F 1.21 in
March 80.9°F 67.1°F 2.37 in 75.0°F 50.9°F 1.09 in
April 83.8°F 71.5°F 3.17 in 82.5°F 56.6°F 0.35 in
May 86.5°F 74.9°F 5.67 in 91.5°F 64.7°F 0.19 in
June 89.6°F 78.0°F 7.37 in 101.5°F 72.7°F 0.03 in
July 90.8°F 79.0°F 5.64 in 104.0°F 80.8°F 0.81 in
August 91.4°F 79.4°F 7.05 in 102.5°F 80.5°F 0.96 in
September 90.3°F 78.7°F 7.54 in 97.5°F 74.7°F 0.71 in
October 87.2°F 76.1°F 6.33 in 86.3°F 62.7°F 0.67 in
November 82.7°F 70.7°F 3.51 in 74.0°F 50.8°F 0.90 in
December 79.7°F 66.0°F 2.24 in 63.9°F 42.7°F 0.81 in
Key Biscayne overview
Full climate profile
 Phoenix overview
Full climate profile