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