S
M
T
W
T
F
S
26
68°
27°
27
71°
33°
28
67°
48°
29
72°
43°
30
78°
36°
1
83°
37°
2
85°
47°
3
87°
46°
4
90°
53°
5
87°
52°
6
89°
61°
7
85°
58°
8
75°
50°
9
77°
49°
10
82°
53°
11
81°
54°
12
77°
51°
13
77°
51°
14
79°
51°
15
76°
48°
16
73°
47°
17
72°
48°
18
66°
46°
19
66°
44°
20
67°
46°
21
77°
54°
22
78°
56°
23
75°
53°
24
78°
55°
25
79°
55°
26
78°
56°
27
78°
56°
28
77°
55°
29
78°
56°
30
80°
56°
31
81°
57°
1
82°
58°
2
81°
57°
3
81°
58°
4
80°
57°
5
80°
57°
6
79°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in McNary
McNary's May 2026 forecast shows daily high temperatures ranging from 66° to 90°, with overnight lows between 44° and 61°. The average high for May is 78° with an average low of 53°. 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 McNary. See also: June | July | August.
