S
M
T
W
T
F
S
29
41°
27°
30
38°
27°
1
38°
29°
2
40°
36°
3
45°
29°
4
51°
26°
5
40°
33°
6
37°
33°
7
41°
34°
8
46°
35°
9
39°
26°
10
47°
39°
11
48°
39°
12
Hist. Avg.
40°
28°
13
Hist. Avg.
40°
27°
14
Hist. Avg.
39°
27°
15
Hist. Avg.
39°
27°
16
Hist. Avg.
39°
27°
17
Hist. Avg.
38°
26°
18
Hist. Avg.
38°
26°
19
Hist. Avg.
38°
26°
20
Hist. Avg.
38°
26°
21
Hist. Avg.
38°
25°
22
Hist. Avg.
37°
25°
23
Hist. Avg.
37°
25°
24
Hist. Avg.
37°
25°
25
Hist. Avg.
37°
24°
26
Hist. Avg.
36°
24°
27
Hist. Avg.
36°
24°
28
Hist. Avg.
36°
24°
29
Hist. Avg.
36°
23°
30
Hist. Avg.
36°
23°
31
Hist. Avg.
36°
23°
1
Hist. Avg.
36°
22°
2
Hist. Avg.
35°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Westfield
Westfield's December 2026 forecast shows daily high temperatures ranging from 37° to 51°, with overnight lows between 26° and 39°. The average high for December is 42° with an average low of 32°. 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.
