S
M
T
W
T
F
S
26
61°
36°
27
65°
38°
28
66°
42°
29
67°
44°
30
67°
43°
1
68°
44°
2
69°
44°
3
68°
45°
4
69°
45°
5
68°
39°
6
57°
36°
7
57°
35°
8
58°
35°
9
60°
37°
10
68°
45°
11
64°
40°
12
69°
45°
13
70°
46°
14
71°
43°
15
61°
40°
16
63°
40°
17
66°
43°
18
71°
46°
19
73°
45°
20
66°
46°
21
69°
45°
22
67°
42°
23
61°
46°
24
70°
47°
25
71°
49°
26
66°
49°
27
74°
47°
28
67°
46°
29
63°
46°
30
69°
50°
31
73°
50°
1
69°
52°
2
76°
54°
3
77°
52°
4
71°
49°
5
68°
46°
6
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harrison
Harrison's May 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 35° and 54°. The average high for May is 67° with an average low of 44°. 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 Harrison. See also: June | July | August.