S
M
T
W
T
F
S
27
90°
75°
28
89°
76°
29
90°
75°
30
89°
76°
1
89°
76°
2
90°
75°
3
90°
77°
4
89°
77°
5
90°
76°
6
90°
77°
7
89°
76°
8
89°
76°
9
88°
75°
10
89°
77°
11
88°
76°
12
89°
75°
13
88°
76°
14
89°
75°
15
89°
76°
16
88°
76°
17
89°
75°
18
89°
76°
19
88°
76°
20
89°
75°
21
88°
76°
22
88°
76°
23
87°
75°
24
89°
76°
25
88°
75°
26
88°
76°
27
87°
74°
28
89°
75°
29
87°
74°
30
88°
75°
31
87°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Guaynabo
Guaynabo's October 2026 forecast shows daily high temperatures ranging from 87° to 90°, with overnight lows between 74° and 77°. The average high for October is 89° 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 Guaynabo. See also: November | December | January.
