S
M
T
W
T
F
S
26
57°
41°
27
69°
38°
28
58°
42°
29
59°
47°
30
63°
47°
1
62°
37°
2
58°
39°
3
57°
41°
4
67°
52°
5
78°
61°
6
70°
51°
7
62°
42°
8
59°
41°
9
58°
43°
10
63°
47°
11
62°
45°
12
64°
46°
13
62°
49°
14
65°
50°
15
68°
51°
16
74°
54°
17
75°
55°
18
76°
55°
19
75°
54°
20
74°
56°
21
75°
55°
22
73°
48°
23
68°
47°
24
67°
49°
25
68°
49°
26
69°
50°
27
69°
49°
28
70°
51°
29
69°
49°
30
69°
52°
31
71°
59°
1
75°
57°
2
71°
54°
3
72°
57°
4
76°
59°
5
75°
57°
6
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Downingtown
Downingtown's May 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 39° and 61°. The average high for May is 69° with an average low of 51°. 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 Downingtown. See also: June | July | August.
