S
M
T
W
T
F
S
26
74°
53°
27
71°
52°
28
72°
46°
29
83°
56°
30
74°
57°
1
68°
59°
2
62°
47°
3
70°
39°
4
80°
46°
5
82°
48°
6
83°
59°
7
79°
57°
8
71°
53°
9
77°
57°
10
86°
61°
11
84°
57°
12
70°
51°
13
80°
52°
14
81°
57°
15
79°
47°
16
87°
53°
17
91°
60°
18
92°
64°
19
93°
60°
20
91°
62°
21
93°
63°
22
88°
69°
23
86°
70°
24
85°
67°
25
85°
72°
26
90°
71°
27
88°
71°
28
90°
68°
29
86°
69°
30
83°
63°
31
76°
63°
1
82°
60°
2
78°
61°
3
82°
62°
4
79°
64°
5
82°
64°
6
79°
66°
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 76° to 90°, with overnight lows between 60° and 71°. The average high for May is 82° with an average low of 65°. 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.
