S
M
T
W
T
F
S
27
46°
23°
28
45°
24°
29
46°
26°
30
47°
25°
31
46°
23°
1
44°
19°
2
43°
19°
3
41°
24°
4
45°
30°
5
47°
39°
6
59°
30°
7
60°
21°
8
48°
22°
9
44°
22°
10
45°
21°
11
46°
19°
12
43°
17°
13
42°
19°
14
42°
18°
15
43°
20°
16
44°
25°
17
49°
20°
18
44°
17°
19
42°
16°
20
39°
20°
21
43°
29°
22
45°
36°
23
53°
35°
24
55°
30°
25
56°
25°
26
51°
26°
27
50°
26°
28
48°
23°
29
47°
24°
30
43°
20°
31
44°
21°
1
Hist. Avg.
55°
34°
2
Hist. Avg.
55°
34°
3
Hist. Avg.
55°
34°
4
Hist. Avg.
55°
35°
5
Hist. Avg.
55°
35°
6
Hist. Avg.
56°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Myrtle
Myrtle's January 2027 forecast shows daily high temperatures ranging from 39° to 60°, with overnight lows between 16° and 39°. The average high for January is 47° with an average low of 24°. 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 Myrtle. See also: February | March | April.