S
M
T
W
T
F
S
26
58°
30°
27
70°
30°
28
68°
57°
29
60°
48°
30
48°
40°
1
51°
39°
2
48°
34°
3
51°
43°
4
60°
52°
5
59°
43°
6
50°
39°
7
51°
38°
8
49°
39°
9
52°
41°
10
56°
44°
11
59°
42°
12
58°
44°
13
59°
45°
14
58°
43°
15
60°
39°
16
59°
41°
17
60°
41°
18
63°
49°
19
64°
50°
20
68°
50°
21
70°
49°
22
66°
46°
23
61°
50°
24
68°
45°
25
61°
42°
26
63°
47°
27
64°
51°
28
63°
52°
29
69°
52°
30
66°
47°
31
66°
44°
1
63°
44°
2
63°
45°
3
65°
45°
4
64°
46°
5
65°
46°
6
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gananoque
Gananoque's May 2026 forecast shows daily high temperatures ranging from 48° to 70°, with overnight lows between 34° and 52°. The average high for May is 60° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Gananoque. See also: June | July | August.
