S
M
T
W
T
F
S
26
67°
27°
27
74°
29°
28
66°
32°
29
63°
42°
30
50°
43°
1
60°
29°
2
49°
30°
3
53°
32°
4
72°
31°
5
85°
41°
6
67°
51°
7
63°
36°
8
57°
33°
9
54°
44°
10
65°
43°
11
60°
36°
12
60°
31°
13
58°
45°
14
56°
46°
15
59°
42°
16
64°
45°
17
69°
49°
18
73°
50°
19
70°
46°
20
69°
47°
21
72°
48°
22
70°
44°
23
73°
50°
24
72°
49°
25
72°
49°
26
73°
51°
27
74°
50°
28
72°
50°
29
75°
52°
30
75°
53°
31
74°
52°
1
74°
50°
2
67°
48°
3
67°
47°
4
71°
51°
5
69°
53°
6
74°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Effingham
Effingham's May 2026 forecast shows daily high temperatures ranging from 54° to 75°, with overnight lows between 31° and 53°. The average high for May is 68° with an average low of 47°. 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 Effingham. See also: June | July | August.
