S
M
T
W
T
F
S
26
59°
43°
27
69°
43°
28
64°
46°
29
61°
49°
30
63°
49°
1
66°
46°
2
64°
50°
3
63°
46°
4
74°
46°
5
86°
57°
6
73°
56°
7
67°
50°
8
65°
48°
9
69°
52°
10
77°
50°
11
63°
52°
12
68°
46°
13
76°
50°
14
68°
52°
15
68°
52°
16
81°
65°
17
88°
65°
18
81°
67°
19
96°
71°
20
91°
60°
21
69°
54°
22
67°
54°
23
69°
57°
24
74°
59°
25
73°
62°
26
78°
63°
27
80°
63°
28
79°
57°
29
70°
56°
30
71°
62°
31
78°
59°
1
71°
57°
2
72°
57°
3
71°
56°
4
72°
56°
5
73°
63°
6
78°
64°
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 67° to 96°, with overnight lows between 52° and 71°. The average high for May is 76° with an average low of 60°. 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.