S
M
T
W
T
F
S
26
43°
28°
27
55°
28°
28
51°
27°
29
46°
34°
30
44°
36°
1
49°
39°
2
61°
36°
3
48°
36°
4
59°
41°
5
69°
49°
6
66°
49°
7
54°
43°
8
53°
38°
9
56°
39°
10
57°
41°
11
53°
41°
12
51°
40°
13
56°
41°
14
55°
42°
15
57°
39°
16
64°
41°
17
63°
40°
18
59°
42°
19
65°
42°
20
61°
41°
21
65°
43°
22
64°
44°
23
61°
44°
24
62°
43°
25
65°
44°
26
62°
44°
27
65°
45°
28
65°
45°
29
66°
44°
30
64°
44°
31
63°
45°
1
64°
46°
2
67°
45°
3
64°
46°
4
68°
46°
5
63°
45°
6
64°
47°
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 48° to 69°, with overnight lows between 36° and 49°. The average high for May is 61° with an average low of 43°. 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.