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