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