S
M
T
W
T
F
S
26
84°
62°
27
73°
53°
28
71°
47°
29
86°
62°
30
81°
64°
1
78°
59°
2
64°
54°
3
75°
48°
4
81°
48°
5
83°
52°
6
90°
61°
7
79°
65°
8
73°
58°
9
73°
63°
10
86°
64°
11
88°
64°
12
70°
61°
13
77°
61°
14
81°
55°
15
81°
52°
16
88°
54°
17
91°
68°
18
90°
63°
19
90°
61°
20
91°
64°
21
91°
66°
22
91°
70°
23
84°
68°
24
90°
68°
25
83°
70°
26
85°
70°
27
84°
68°
28
87°
71°
29
83°
69°
30
82°
67°
31
78°
61°
1
82°
65°
2
84°
64°
3
83°
66°
4
82°
66°
5
84°
68°
6
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Norristown
Norristown's May 2026 forecast shows daily high temperatures ranging from 78° to 90°, with overnight lows between 61° and 71°. The average high for May is 84° with an average low of 67°. 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 Norristown. See also: June | July | August.
