S
M
T
W
T
F
S
26
66°
32°
27
73°
35°
28
68°
44°
29
56°
45°
30
48°
37°
1
53°
29°
2
48°
35°
3
58°
36°
4
N/A
5
65°
42°
6
53°
36°
7
56°
38°
8
54°
37°
9
55°
41°
10
57°
40°
11
55°
38°
12
57°
37°
13
58°
42°
14
59°
44°
15
55°
41°
16
58°
43°
17
61°
44°
18
68°
48°
19
64°
44°
20
66°
49°
21
69°
49°
22
68°
48°
23
61°
41°
24
59°
42°
25
60°
42°
26
62°
44°
27
62°
43°
28
63°
42°
29
62°
43°
30
65°
45°
31
64°
50°
1
65°
46°
2
66°
45°
3
69°
51°
4
69°
48°
5
68°
53°
6
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Smiths Falls
Smiths Falls's May 2026 forecast shows daily high temperatures ranging from 53° to 75°, with overnight lows between 36° and 55°. The average high for May is 62° with an average low of 44°. 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 Smiths Falls. See also: June | July | August.
