S
M
T
W
T
F
S
27
85°
79°
28
86°
79°
29
87°
78°
30
86°
79°
1
85°
79°
2
86°
78°
3
85°
77°
4
85°
77°
5
86°
76°
6
85°
78°
7
83°
78°
8
83°
77°
9
84°
77°
10
84°
78°
11
85°
78°
12
84°
76°
13
85°
76°
14
86°
74°
15
85°
75°
16
84°
76°
17
85°
75°
18
86°
74°
19
84°
74°
20
85°
72°
21
84°
72°
22
85°
74°
23
86°
75°
24
86°
75°
25
85°
74°
26
86°
75°
27
86°
75°
28
85°
74°
29
85°
75°
30
86°
75°
31
85°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Key Largo
Key Largo's October 2026 forecast shows daily high temperatures ranging from 83° to 87°, with overnight lows between 72° and 79°. The average high for October is 85° with an average low of 76°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Key Largo. See also: November | December | January.
