S
M
T
W
T
F
S
26
50°
36°
27
54°
35°
28
55°
33°
29
56°
37°
30
60°
37°
1
56°
33°
2
59°
39°
3
63°
40°
4
64°
41°
5
63°
40°
6
64°
42°
7
66°
44°
8
66°
41°
9
65°
39°
10
60°
41°
11
58°
42°
12
61°
43°
13
62°
43°
14
60°
42°
15
66°
45°
16
68°
46°
17
69°
45°
18
70°
31°
19
60°
35°
20
60°
36°
21
61°
34°
22
60°
37°
23
62°
38°
24
58°
39°
25
62°
48°
26
65°
38°
27
71°
45°
28
66°
49°
29
64°
44°
30
75°
44°
31
66°
49°
1
73°
43°
2
74°
51°
3
76°
51°
4
75°
41°
5
70°
41°
6
65°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Boulder Junction
Boulder Junction's May 2026 forecast shows daily high temperatures ranging from 50° to 76°, with overnight lows between 31° and 51°. The average high for May is 64° with an average low of 41°. 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. See also: June | July | August.
