S
M
T
W
T
F
S
26
70°
42°
27
58°
42°
28
61°
49°
29
72°
46°
30
77°
48°
1
79°
47°
2
83°
53°
3
85°
55°
4
84°
57°
5
72°
48°
6
59°
50°
7
68°
53°
8
61°
53°
9
72°
45°
10
69°
45°
11
75°
46°
12
82°
53°
13
65°
53°
14
62°
50°
15
52°
43°
16
54°
43°
17
67°
46°
18
67°
44°
19
63°
52°
20
71°
49°
21
76°
47°
22
79°
48°
23
70°
53°
24
72°
51°
25
60°
52°
26
67°
51°
27
79°
57°
28
82°
57°
29
63°
48°
30
61°
45°
31
68°
52°
1
80°
56°
2
90°
57°
3
78°
54°
4
74°
52°
5
72°
51°
6
70°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harrison Mills
Harrison Mills's May 2026 forecast shows daily high temperatures ranging from 61° to 90°, with overnight lows between 45° and 57°. The average high for May is 74° 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 Harrison Mills. See also: June | July | August.