S
M
T
W
T
F
S
26
76°
54°
27
74°
53°
28
71°
53°
29
65°
52°
30
65°
54°
1
66°
54°
2
64°
53°
3
67°
54°
4
69°
56°
5
71°
55°
6
73°
57°
7
71°
57°
8
73°
58°
9
76°
57°
10
69°
58°
11
71°
58°
12
75°
57°
13
77°
59°
14
78°
59°
15
77°
58°
16
77°
59°
17
78°
60°
18
81°
56°
19
77°
55°
20
77°
56°
21
76°
58°
22
75°
62°
23
81°
63°
24
85°
63°
25
84°
64°
26
86°
64°
27
86°
65°
28
87°
65°
29
86°
63°
30
88°
56°
31
81°
62°
1
81°
64°
2
84°
65°
3
88°
66°
4
89°
67°
5
90°
56°
6
88°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harper
Harper's May 2026 forecast shows daily high temperatures ranging from 64° to 90°, with overnight lows between 52° and 67°. The average high for May is 77° with an average low of 59°. 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 Harper. See also: June | July | August.
