S
M
T
W
T
F
S
29
45°
25°
30
44°
28°
1
49°
31°
2
48°
20°
3
47°
20°
4
40°
22°
5
41°
24°
6
40°
20°
7
39°
17°
8
38°
15°
9
37°
14°
10
35°
14°
11
33°
13°
12
34°
18°
13
36°
19°
14
37°
21°
15
38°
24°
16
40°
25°
17
40°
26°
18
41°
31°
19
47°
24°
20
48°
28°
21
48°
29°
22
47°
22°
23
41°
16°
24
40°
25°
25
37°
24°
26
39°
19°
27
39°
25°
28
42°
24°
29
46°
22°
30
38°
12°
31
34°
10°
1
Hist. Avg.
41°
21°
2
Hist. Avg.
41°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Newton
Newton's December 2026 forecast shows daily high temperatures ranging from 33° to 49°, with overnight lows between 10° and 31°. The average high for December is 41° with an average low of 21°. 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 Newton. See also: January | February | March.
