S
M
T
W
T
F
S
1
19°
-10°
2
23°
-15°
3
40°
8°
4
44°
29°
5
30°
16°
6
35°
14°
7
54°
29°
8
49°
39°
9
61°
39°
10
56°
33°
11
34°
29°
12
34°
23°
13
33°
20°
14
34°
15°
15
33°
7°
16
66°
26°
17
31°
11°
18
27°
2°
19
37°
23°
20
28°
24°
21
39°
24°
22
33°
23°
23
38°
23°
24
38°
18°
25
42°
24°
26
44°
29°
27
29°
14°
28
35°
11°
29
49°
25°
30
61°
30°
31
45°
33°
1
38°
27°
2
44°
27°
3
71°
37°
4
46°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in Smiths Falls
Smiths Falls's March 2026 forecast shows daily high temperatures ranging from 46° to 46°, with overnight lows between 40° and 40°. The average high for March is 46° with an average low of 40°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how March weather will actually feel in Smiths Falls. See also: April | May | June.
