S
M
T
W
T
F
S
29
53°
43°
30
53°
44°
1
52°
43°
2
53°
42°
3
52°
42°
4
51°
41°
5
50°
43°
6
51°
42°
7
50°
41°
8
49°
40°
9
50°
41°
10
49°
42°
11
51°
43°
12
50°
41°
13
47°
38°
14
52°
41°
15
51°
42°
16
Hist. Avg.
44°
37°
17
Hist. Avg.
44°
37°
18
Hist. Avg.
44°
37°
19
Hist. Avg.
44°
37°
20
Hist. Avg.
44°
37°
21
Hist. Avg.
44°
37°
22
Hist. Avg.
44°
37°
23
Hist. Avg.
44°
37°
24
Hist. Avg.
43°
37°
25
Hist. Avg.
43°
37°
26
Hist. Avg.
43°
37°
27
Hist. Avg.
43°
36°
28
Hist. Avg.
43°
36°
29
Hist. Avg.
43°
36°
30
Hist. Avg.
43°
36°
31
Hist. Avg.
43°
36°
1
Hist. Avg.
43°
36°
2
Hist. Avg.
43°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Newcastle
Newcastle's December 2026 forecast shows daily high temperatures ranging from 47° to 53°, with overnight lows between 38° and 44°. The average high for December is 51° with an average low of 42°. 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 Newcastle. See also: January | February | March.
