S
M
T
W
T
F
S
26
67°
42°
27
58°
37°
28
55°
35°
29
49°
25°
30
42°
31°
1
47°
23°
2
59°
26°
3
68°
42°
4
64°
33°
5
45°
30°
6
43°
34°
7
51°
28°
8
62°
27°
9
53°
32°
10
50°
24°
11
61°
37°
12
66°
36°
13
62°
31°
14
70°
43°
15
82°
51°
16
82°
40°
17
56°
40°
18
76°
53°
19
62°
40°
20
56°
34°
21
62°
39°
22
62°
45°
23
59°
50°
24
69°
45°
25
74°
50°
26
78°
54°
27
75°
51°
28
74°
52°
29
75°
52°
30
71°
53°
31
74°
51°
1
76°
51°
2
69°
45°
3
73°
52°
4
72°
50°
5
71°
46°
6
63°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Boulder Junction Town
Boulder Junction Town's May 2026 forecast shows daily high temperatures ranging from 56° to 78°, with overnight lows between 34° and 54°. The average high for May is 70° with an average low of 48°. 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 Boulder Junction Town. See also: June | July | August.