S
M
T
W
T
F
S
26
65°
39°
27
71°
33°
28
68°
36°
29
66°
39°
30
53°
43°
1
58°
39°
2
53°
36°
3
52°
31°
4
68°
42°
5
79°
47°
6
64°
45°
7
55°
40°
8
52°
34°
9
52°
34°
10
65°
47°
11
56°
39°
12
58°
34°
13
63°
52°
14
58°
48°
15
58°
46°
16
76°
57°
17
79°
52°
18
76°
56°
19
85°
63°
20
76°
50°
21
65°
45°
22
67°
46°
23
66°
48°
24
67°
50°
25
66°
50°
26
71°
48°
27
67°
47°
28
65°
45°
29
67°
49°
30
67°
53°
31
73°
51°
1
68°
50°
2
68°
48°
3
67°
47°
4
68°
47°
5
69°
54°
6
71°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mill River
Mill River's May 2026 forecast shows daily high temperatures ranging from 58° to 85°, with overnight lows between 45° and 63°. The average high for May is 69° with an average low of 50°. 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 Mill River. See also: June | July | August.