S
M
T
W
T
F
S
29
44°
37°
30
47°
34°
1
47°
35°
2
46°
35°
3
48°
21°
4
53°
19°
5
35°
19°
6
34°
20°
7
36°
22°
8
37°
18°
9
36°
16°
10
31°
16°
11
30°
19°
12
32°
18°
13
34°
19°
14
35°
21°
15
38°
23°
16
41°
22°
17
40°
27°
18
42°
30°
19
40°
29°
20
39°
27°
21
36°
27°
22
36°
25°
23
37°
22°
24
38°
18°
25
36°
24°
26
33°
22°
27
33°
17°
28
34°
19°
29
32°
22°
30
33°
23°
31
Hist. Avg.
36°
20°
1
Hist. Avg.
36°
20°
2
Hist. Avg.
36°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Radnor
Radnor's December 2026 forecast shows daily high temperatures ranging from 30° to 53°, with overnight lows between 16° and 37°. The average high for December is 38° with an average low of 23°. 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 Radnor. See also: January | February | March.
