S
M
T
W
T
F
S
26
59°
41°
27
70°
36°
28
61°
38°
29
63°
48°
30
64°
48°
1
64°
38°
2
60°
45°
3
61°
41°
4
73°
37°
5
82°
51°
6
69°
52°
7
65°
50°
8
66°
41°
9
60°
48°
10
74°
49°
11
62°
45°
12
67°
36°
13
73°
53°
14
63°
51°
15
68°
45°
16
77°
59°
17
83°
55°
18
92°
63°
19
93°
66°
20
85°
60°
21
70°
47°
22
68°
50°
23
73°
51°
24
74°
52°
25
78°
57°
26
79°
60°
27
83°
54°
28
75°
55°
29
70°
56°
30
71°
58°
31
75°
55°
1
70°
54°
2
71°
52°
3
70°
52°
4
71°
53°
5
72°
60°
6
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Boyertown
Boyertown's May 2026 forecast shows daily high temperatures ranging from 68° to 93°, with overnight lows between 45° and 66°. The average high for May is 76° with an average low of 55°. 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 Boyertown. See also: June | July | August.