S
M
T
W
T
F
S
26
81°
57°
27
86°
61°
28
65°
49°
29
63°
46°
30
68°
38°
1
64°
41°
2
63°
41°
3
80°
37°
4
83°
61°
5
65°
43°
6
62°
38°
7
68°
48°
8
76°
48°
9
81°
57°
10
65°
43°
11
69°
51°
12
80°
54°
13
78°
58°
14
77°
59°
15
77°
59°
16
76°
56°
17
75°
54°
18
77°
57°
19
79°
55°
20
76°
59°
21
72°
55°
22
71°
54°
23
72°
56°
24
74°
60°
25
74°
60°
26
75°
59°
27
75°
58°
28
76°
56°
29
76°
55°
30
79°
60°
31
80°
60°
1
83°
62°
2
82°
63°
3
83°
63°
4
84°
64°
5
84°
65°
6
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Robert
St. Robert's May 2026 forecast shows daily high temperatures ranging from 62° to 84°, with overnight lows between 38° and 65°. The average high for May is 76° with an average low of 57°. 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 St. Robert. See also: June | July | August.