S
M
T
W
T
F
S
31
75°
67°
1
82°
68°
2
80°
61°
3
81°
54°
4
86°
56°
5
89°
63°
6
87°
67°
7
88°
70°
8
91°
69°
9
83°
63°
10
83°
64°
11
87°
66°
12
90°
68°
13
91°
70°
14
89°
69°
15
87°
69°
16
89°
71°
17
88°
70°
18
90°
71°
19
91°
71°
20
91°
70°
21
90°
72°
22
92°
72°
23
90°
70°
24
88°
68°
25
90°
72°
26
91°
71°
27
92°
72°
28
93°
73°
29
91°
72°
30
92°
73°
1
88°
70°
2
85°
68°
3
87°
68°
4
88°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Jamestown
Jamestown's June 2026 forecast shows daily high temperatures ranging from 83° to 93°, with overnight lows between 56° and 73°. The average high for June is 89° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Jamestown. See also: July | August | September.