S
M
T
W
T
F
S
29
37°
28°
30
37°
25°
1
35°
29°
2
34°
28°
3
34°
29°
4
35°
26°
5
36°
24°
6
37°
28°
7
38°
17°
8
37°
16°
9
32°
29°
10
33°
28°
11
33°
31°
12
33°
19°
13
29°
26°
14
Hist. Avg.
30°
12°
15
Hist. Avg.
30°
12°
16
Hist. Avg.
30°
12°
17
Hist. Avg.
30°
12°
18
Hist. Avg.
29°
11°
19
Hist. Avg.
29°
11°
20
Hist. Avg.
29°
11°
21
Hist. Avg.
29°
11°
22
Hist. Avg.
29°
11°
23
Hist. Avg.
29°
11°
24
Hist. Avg.
29°
10°
25
Hist. Avg.
29°
10°
26
Hist. Avg.
28°
10°
27
Hist. Avg.
28°
10°
28
Hist. Avg.
28°
10°
29
Hist. Avg.
28°
10°
30
Hist. Avg.
28°
10°
31
Hist. Avg.
28°
9°
1
Hist. Avg.
29°
9°
2
Hist. Avg.
29°
9°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Eureka
Eureka's December 2026 forecast shows daily high temperatures ranging from 29° to 38°, with overnight lows between 16° and 31°. The average high for December is 35° with an average low of 26°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Eureka. See also: January | February | March.
