S
M
T
W
T
F
S
26
75°
54°
27
70°
47°
28
60°
45°
29
60°
41°
30
61°
38°
1
60°
37°
2
61°
36°
3
72°
48°
4
82°
53°
5
56°
46°
6
58°
41°
7
72°
48°
8
70°
50°
9
82°
49°
10
70°
46°
11
74°
53°
12
78°
46°
13
74°
53°
14
77°
56°
15
78°
55°
16
77°
59°
17
80°
61°
18
82°
61°
19
80°
60°
20
76°
53°
21
68°
49°
22
68°
51°
23
69°
54°
24
72°
55°
25
72°
58°
26
73°
60°
27
73°
59°
28
74°
57°
29
76°
54°
30
77°
55°
31
81°
61°
1
83°
61°
2
82°
63°
3
83°
63°
4
84°
64°
5
83°
64°
6
82°
63°
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 68° to 84°, with overnight lows between 46° and 64°. The average high for May is 76° with an average low of 56°. 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.
