S
M
T
W
T
F
S
29
42°
30°
30
44°
26°
1
41°
22°
2
39°
26°
3
40°
24°
4
40°
25°
5
38°
29°
6
41°
35°
7
44°
38°
8
52°
34°
9
53°
32°
10
45°
29°
11
43°
30°
12
42°
28°
13
42°
27°
14
39°
24°
15
39°
22°
16
38°
24°
17
36°
20°
18
35°
19°
19
35°
17°
20
36°
31°
21
42°
27°
22
44°
21°
23
40°
26°
24
36°
31°
25
46°
26°
26
44°
18°
27
41°
23°
28
35°
17°
29
38°
18°
30
31°
14°
31
45°
15°
1
34°
18°
2
33°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Westfield
Westfield's December 2026 forecast shows daily high temperatures ranging from 31° to 53°, with overnight lows between 14° and 38°. The average high for December is 40° with an average low of 25°. 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 Westfield. See also: January | February | March.
