S
M
T
W
T
F
S
29
39°
30°
30
48°
21°
1
46°
21°
2
35°
25°
3
43°
19°
4
42°
18°
5
33°
16°
6
30°
16°
7
29°
18°
8
32°
23°
9
35°
25°
10
37°
27°
11
38°
23°
12
36°
22°
13
33°
19°
14
35°
18°
15
32°
11°
16
29°
8°
17
25°
16°
18
28°
24°
19
37°
23°
20
38°
16°
21
39°
20°
22
30°
24°
23
38°
25°
24
39°
20°
25
38°
19°
26
34°
20°
27
35°
21°
28
36°
22°
29
37°
23°
30
38°
24°
31
40°
21°
1
40°
19°
2
38°
18°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Gananoque
Gananoque's December 2026 forecast shows daily high temperatures ranging from 25° to 48°, with overnight lows between 8° and 30°. The average high for December is 36° with an average low of 20°. 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 Gananoque. See also: January | February | March.
