S
M
T
W
T
F
S
29
47°
32°
30
49°
36°
1
51°
35°
2
50°
35°
3
51°
33°
4
47°
31°
5
49°
30°
6
47°
33°
7
49°
31°
8
42°
28°
9
39°
27°
10
39°
25°
11
37°
30°
12
38°
27°
13
40°
27°
14
39°
22°
15
37°
22°
16
39°
23°
17
38°
24°
18
37°
28°
19
43°
27°
20
44°
19°
21
38°
20°
22
34°
21°
23
33°
21°
24
37°
20°
25
38°
20°
26
41°
13°
27
34°
11°
28
29°
12°
29
32°
8°
30
32°
19°
31
34°
23°
1
46°
16°
2
42°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Plattekill
Plattekill's December 2026 forecast shows daily high temperatures ranging from 29° to 51°, with overnight lows between 8° and 36°. The average high for December is 41° with an average low of 24°. 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 Plattekill. See also: January | February | March.