S
M
T
W
T
F
S
26
70°
47°
27
65°
54°
28
60°
50°
29
61°
41°
30
59°
34°
1
52°
38°
2
52°
36°
3
61°
36°
4
73°
48°
5
59°
44°
6
56°
41°
7
59°
34°
8
63°
46°
9
79°
44°
10
80°
41°
11
85°
39°
12
87°
48°
13
79°
45°
14
78°
45°
15
80°
47°
16
82°
41°
17
81°
42°
18
76°
46°
19
77°
45°
20
79°
48°
21
77°
45°
22
75°
42°
23
77°
47°
24
78°
48°
25
77°
48°
26
75°
47°
27
74°
47°
28
73°
48°
29
73°
48°
30
77°
47°
31
74°
46°
1
72°
49°
2
74°
49°
3
78°
50°
4
81°
51°
5
80°
51°
6
81°
50°
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 72° to 87°, with overnight lows between 39° and 51°. The average high for May is 78° with an average low of 46°. 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.
