S
M
T
W
T
F
S
26
76°
48°
27
82°
48°
28
78°
60°
29
74°
54°
30
64°
42°
1
68°
39°
2
72°
37°
3
64°
30°
4
80°
41°
5
74°
54°
6
81°
54°
7
65°
43°
8
73°
36°
9
75°
49°
10
82°
46°
11
71°
48°
12
77°
41°
13
77°
42°
14
65°
41°
15
78°
59°
16
84°
63°
17
91°
65°
18
87°
66°
19
81°
64°
20
75°
61°
21
76°
60°
22
72°
58°
23
73°
55°
24
74°
56°
25
78°
60°
26
79°
56°
27
80°
61°
28
77°
62°
29
80°
61°
30
77°
59°
31
74°
56°
1
74°
57°
2
75°
56°
3
75°
56°
4
78°
59°
5
82°
63°
6
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Jamestown
Jamestown's May 2026 forecast shows daily high temperatures ranging from 65° to 91°, with overnight lows between 41° and 66°. The average high for May is 78° with an average low of 58°. 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 Jamestown. See also: June | July | August.
