S
M
T
W
T
F
S
27
34°
25°
28
35°
31°
29
47°
26°
30
48°
25°
31
36°
25°
1
37°
22°
2
39°
19°
3
34°
20°
4
32°
20°
5
32°
18°
6
31°
18°
7
30°
19°
8
31°
19°
9
32°
20°
10
32°
25°
11
45°
20°
12
44°
17°
13
30°
18°
14
31°
18°
15
34°
22°
16
33°
15°
17
34°
14°
18
27°
15°
19
28°
20°
20
31°
21°
21
35°
22°
22
35°
19°
23
34°
19°
24
33°
27°
25
38°
25°
26
46°
23°
27
40°
18°
28
33°
21°
29
33°
28°
30
37°
18°
31
41°
14°
1
37°
20°
2
32°
14°
3
33°
11°
4
31°
15°
5
30°
14°
6
34°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Greenwich
Greenwich's January 2027 forecast shows daily high temperatures ranging from 27° to 48°, with overnight lows between 11° and 31°. The average high for January is 35° with an average low of 20°. 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 Greenwich. See also: February | March | April.
