S
M
T
W
T
F
S
27
62°
58°
28
62°
56°
29
68°
55°
30
73°
58°
1
77°
60°
2
83°
57°
3
71°
54°
4
65°
54°
5
70°
48°
6
61°
40°
7
65°
49°
8
70°
52°
9
69°
51°
10
68°
49°
11
63°
47°
12
66°
51°
13
66°
48°
14
65°
45°
15
58°
40°
16
61°
42°
17
67°
49°
18
67°
49°
19
64°
48°
20
65°
44°
21
61°
41°
22
57°
41°
23
58°
42°
24
64°
47°
25
65°
46°
26
65°
40°
27
54°
37°
28
56°
36°
29
58°
40°
30
57°
41°
31
58°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Old Greenwich
Old Greenwich's October 2026 forecast shows daily high temperatures ranging from 54° to 83°, with overnight lows between 36° and 57°. The average high for October is 64° with an average low of 46°. 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 Old Greenwich. See also: November | December | January.
