S
M
T
W
T
F
S
29
56°
40°
30
55°
40°
1
55°
45°
2
59°
41°
3
58°
46°
4
59°
41°
5
57°
38°
6
55°
41°
7
56°
41°
8
60°
40°
9
60°
41°
10
59°
42°
11
59°
42°
12
60°
43°
13
60°
43°
14
59°
42°
15
59°
42°
16
58°
41°
17
59°
41°
18
59°
40°
19
58°
43°
20
58°
38°
21
53°
34°
22
51°
37°
23
49°
38°
24
51°
37°
25
50°
34°
26
48°
33°
27
49°
32°
28
49°
36°
29
51°
38°
30
52°
42°
31
54°
37°
1
56°
38°
2
54°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Isleton
Isleton's December 2026 forecast shows daily high temperatures ranging from 48° to 60°, with overnight lows between 32° and 46°. The average high for December is 56° with an average low of 40°. 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 Isleton. See also: January | February | March.
