Key Biscayne, FL vs Miami, FL

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

Key Biscayne is warmer than Miami (78.7°F vs 76.1°F annual avg) and similar rainfall to it (55.3 in vs 57.2 in per year). Both cities share a Tropical monsoon climate (Am).

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

Miami, FL

Annual avg
76.1°F
Annual precip
57.2 in
Warmest month
August (88.1°F)
Coldest month
January (61.2°F)
Annual swing
15.7°F
Pleasant months
6 / 12
Tropical monsoon Am USDA Zone 11b

Best months to visit each city

Key Biscayne

J
F
M
A
M
J
J
A
S
O
N
D

Miami

J
F
M
A
M
J
J
A
S
O
N
D

Month-by-month comparison

Month Key Biscayne Miami
High Low Precip High Low Precip
January 77.5°F 62.8°F 2.44 in 73.6°F 61.2°F 2.33 in
February 78.9°F 64.8°F 2.00 in 74.8°F 63.3°F 2.27 in
March 80.9°F 67.1°F 2.37 in 76.5°F 65.2°F 2.47 in
April 83.8°F 71.5°F 3.17 in 79.6°F 69.8°F 3.44 in
May 86.5°F 74.9°F 5.67 in 82.7°F 73.6°F 4.94 in
June 89.6°F 78.0°F 7.37 in 86.0°F 76.5°F 7.76 in
July 90.8°F 79.0°F 5.64 in 87.8°F 78.0°F 5.98 in
August 91.4°F 79.4°F 7.05 in 88.1°F 78.1°F 7.51 in
September 90.3°F 78.7°F 7.54 in 87.0°F 77.2°F 8.45 in
October 87.2°F 76.1°F 6.33 in 83.7°F 74.4°F 6.49 in
November 82.7°F 70.7°F 3.51 in 78.9°F 68.6°F 3.29 in
December 79.7°F 66.0°F 2.24 in 76.1°F 64.6°F 2.25 in
Key Biscayne overview
Full climate profile
 Miami overview
Full climate profile