S
M
T
W
T
F
S
26
43°
28°
27
55°
28°
28
51°
27°
29
46°
34°
30
44°
36°
1
51°
43°
2
63°
36°
3
47°
35°
4
57°
38°
5
69°
47°
6
61°
44°
7
54°
43°
8
53°
38°
9
54°
39°
10
55°
41°
11
53°
39°
12
53°
40°
13
54°
39°
14
55°
37°
15
57°
39°
16
56°
36°
17
56°
36°
18
60°
41°
19
60°
42°
20
58°
42°
21
64°
41°
22
61°
39°
23
58°
38°
24
59°
41°
25
59°
43°
26
60°
42°
27
59°
37°
28
60°
38°
29
60°
42°
30
61°
42°
31
61°
42°
1
62°
42°
2
61°
40°
3
60°
41°
4
61°
42°
5
61°
41°
6
62°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lower South River
Lower South River's May 2026 forecast shows daily high temperatures ranging from 47° to 69°, with overnight lows between 35° and 47°. The average high for May is 58° 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 May weather will actually feel in Lower South River. See also: June | July | August.