S
M
T
W
T
F
S
26
55°
35°
27
59°
34°
28
62°
39°
29
66°
37°
30
71°
37°
1
75°
37°
2
78°
45°
3
77°
42°
4
76°
47°
5
72°
48°
6
77°
43°
7
72°
47°
8
69°
49°
9
71°
46°
10
72°
43°
11
73°
46°
12
81°
44°
13
66°
46°
14
60°
41°
15
58°
40°
16
50°
38°
17
54°
35°
18
60°
44°
19
68°
43°
20
73°
46°
21
76°
49°
22
78°
43°
23
74°
45°
24
74°
44°
25
75°
46°
26
72°
47°
27
70°
45°
28
66°
44°
29
68°
44°
30
71°
48°
31
71°
49°
1
75°
51°
2
71°
51°
3
70°
48°
4
65°
45°
5
64°
43°
6
64°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Maries
St. Maries's May 2026 forecast shows daily high temperatures ranging from 50° to 78°, with overnight lows between 35° and 51°. The average high for May is 68° with an average low of 45°. 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. Maries. See also: June | July | August.