S
M
T
W
T
F
S
26
36°
22°
27
39°
25°
28
34°
27°
29
39°
24°
30
49°
25°
1
58°
31°
2
62°
39°
3
63°
36°
4
41°
30°
5
41°
26°
6
48°
27°
7
55°
25°
8
55°
29°
9
53°
28°
10
57°
25°
11
67°
32°
12
73°
36°
13
82°
38°
14
75°
53°
15
53°
30°
16
45°
30°
17
37°
31°
18
46°
31°
19
54°
26°
20
67°
32°
21
64°
40°
22
54°
46°
23
64°
45°
24
82°
40°
25
78°
48°
26
80°
49°
27
81°
49°
28
98°
55°
29
92°
62°
30
84°
60°
31
84°
59°
1
85°
57°
2
80°
57°
3
68°
48°
4
65°
45°
5
67°
50°
6
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Swan River
Swan River's May 2026 forecast shows daily high temperatures ranging from 65° to 85°, with overnight lows between 45° and 60°. The average high for May is 76° with an average low of 54°. 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 Swan River. See also: June | July | August.