S
M
T
W
T
F
S
28
43°
34°
29
41°
30°
30
46°
31°
31
46°
31°
1
46°
36°
2
42°
33°
3
38°
31°
4
36°
27°
5
37°
27°
6
46°
29°
7
41°
33°
8
43°
32°
9
41°
30°
10
43°
31°
11
52°
41°
12
49°
42°
13
44°
36°
14
45°
39°
15
45°
37°
16
47°
36°
17
46°
41°
18
46°
42°
19
46°
42°
20
48°
41°
21
49°
43°
22
49°
41°
23
48°
40°
24
47°
43°
25
46°
43°
26
43°
40°
27
46°
38°
28
49°
42°
29
46°
39°
30
42°
37°
31
46°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Portrush
Portrush's January 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. 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 Portrush. See also: February | March | April.
