S
M
T
W
T
F
S
29
80°
66°
30
80°
67°
1
79°
66°
2
81°
67°
3
80°
66°
4
79°
67°
5
79°
65°
6
80°
65°
7
77°
66°
8
78°
67°
9
79°
67°
10
79°
66°
11
78°
67°
12
79°
64°
13
80°
67°
14
80°
67°
15
79°
66°
16
79°
67°
17
78°
68°
18
80°
67°
19
80°
65°
20
78°
66°
21
79°
67°
22
78°
66°
23
79°
66°
24
80°
67°
25
79°
66°
26
79°
66°
27
79°
68°
28
Hist. Avg.
79°
65°
29
Hist. Avg.
79°
65°
30
Hist. Avg.
79°
65°
31
Hist. Avg.
79°
65°
1
Hist. Avg.
79°
65°
2
Hist. Avg.
79°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Hilo
Hilo's December 2026 forecast shows daily high temperatures ranging from 77° to 81°, with overnight lows between 64° and 68°. The average high for December is 79° with an average low of 66°. 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 Hilo. See also: January | February | March.
