S
M
T
W
T
F
S
29
55°
39°
30
59°
38°
1
54°
34°
2
55°
42°
3
61°
40°
4
61°
34°
5
48°
35°
6
51°
42°
7
49°
42°
8
50°
41°
9
58°
43°
10
60°
41°
11
52°
34°
12
46°
35°
13
56°
31°
14
45°
31°
15
45°
35°
16
46°
34°
17
51°
41°
18
59°
40°
19
55°
39°
20
57°
33°
21
43°
29°
22
53°
41°
23
57°
39°
24
44°
36°
25
42°
27°
26
44°
28°
27
45°
31°
28
46°
28°
29
46°
28°
30
45°
29°
31
46°
26°
1
46°
27°
2
44°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Bartlett
Bartlett's December 2026 forecast shows daily high temperatures ranging from 42° to 61°, with overnight lows between 26° and 43°. The average high for December is 51° with an average low of 35°. 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 Bartlett. See also: January | February | March.