S
M
T
W
T
F
S
27
80°
67°
28
81°
66°
29
81°
67°
30
80°
67°
31
82°
66°
1
81°
66°
2
80°
65°
3
78°
65°
4
80°
64°
5
76°
65°
6
76°
65°
7
78°
63°
8
79°
64°
9
75°
64°
10
76°
63°
11
80°
64°
12
74°
65°
13
76°
65°
14
80°
64°
15
79°
66°
16
77°
66°
17
77°
66°
18
Hist. Avg.
76°
61°
19
Hist. Avg.
76°
61°
20
Hist. Avg.
76°
61°
21
Hist. Avg.
76°
61°
22
Hist. Avg.
76°
61°
23
Hist. Avg.
76°
61°
24
Hist. Avg.
76°
61°
25
Hist. Avg.
76°
61°
26
Hist. Avg.
76°
61°
27
Hist. Avg.
76°
61°
28
Hist. Avg.
76°
61°
29
Hist. Avg.
77°
61°
30
Hist. Avg.
77°
61°
31
Hist. Avg.
77°
62°
1
Hist. Avg.
77°
62°
2
Hist. Avg.
77°
62°
3
Hist. Avg.
77°
62°
4
Hist. Avg.
77°
62°
5
Hist. Avg.
77°
62°
6
Hist. Avg.
77°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Key Biscayne
Key Biscayne's January 2027 forecast shows daily high temperatures ranging from 74° to 82°, with overnight lows between 63° and 67°. The average high for January is 78° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Key Biscayne. See also: February | March | April.
