S
M
T
W
T
F
S
26
58°
42°
27
69°
45°
28
65°
51°
29
54°
36°
30
52°
32°
1
48°
30°
2
57°
28°
3
68°
45°
4
80°
43°
5
58°
40°
6
54°
31°
7
57°
38°
8
63°
43°
9
70°
45°
10
61°
40°
11
60°
40°
12
58°
43°
13
69°
46°
14
72°
51°
15
73°
49°
16
67°
47°
17
66°
49°
18
71°
49°
19
72°
48°
20
65°
44°
21
66°
45°
22
64°
44°
23
66°
47°
24
67°
48°
25
68°
47°
26
68°
46°
27
71°
46°
28
71°
48°
29
73°
52°
30
78°
54°
31
78°
56°
1
77°
53°
2
73°
55°
3
79°
58°
4
80°
59°
5
81°
58°
6
72°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harvard
Harvard's May 2026 forecast shows daily high temperatures ranging from 54° to 81°, with overnight lows between 31° and 59°. The average high for May is 69° with an average low of 48°. 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 Harvard. See also: June | July | August.
