S
M
T
W
T
F
S
29
41°
25°
30
43°
26°
1
43°
27°
2
42°
22°
3
40°
14°
4
37°
15°
5
28°
27°
6
36°
27°
7
38°
28°
8
43°
27°
9
28°
15°
10
43°
30°
11
46°
26°
12
Hist. Avg.
35°
20°
13
Hist. Avg.
34°
20°
14
Hist. Avg.
34°
20°
15
Hist. Avg.
34°
19°
16
Hist. Avg.
33°
19°
17
Hist. Avg.
33°
19°
18
Hist. Avg.
33°
18°
19
Hist. Avg.
32°
18°
20
Hist. Avg.
32°
18°
21
Hist. Avg.
32°
18°
22
Hist. Avg.
32°
17°
23
Hist. Avg.
31°
17°
24
Hist. Avg.
31°
17°
25
Hist. Avg.
31°
17°
26
Hist. Avg.
31°
16°
27
Hist. Avg.
30°
16°
28
Hist. Avg.
30°
16°
29
Hist. Avg.
30°
16°
30
Hist. Avg.
30°
15°
31
Hist. Avg.
30°
15°
1
Hist. Avg.
29°
15°
2
Hist. Avg.
29°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Marengo
Marengo's December 2026 forecast shows daily high temperatures ranging from 28° to 46°, with overnight lows between 14° and 30°. The average high for December is 39° with an average low of 24°. 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 Marengo. See also: January | February | March.
