S
M
T
W
T
F
S
31
68°
42°
1
69°
45°
2
73°
47°
3
75°
51°
4
77°
60°
5
77°
60°
6
76°
58°
7
74°
60°
8
76°
57°
9
74°
56°
10
75°
56°
11
76°
54°
12
75°
55°
13
73°
54°
14
72°
60°
15
66°
43°
16
66°
43°
17
67°
44°
18
68°
48°
19
72°
53°
20
75°
53°
21
75°
54°
22
76°
54°
23
72°
53°
24
73°
46°
25
68°
47°
26
70°
54°
27
74°
54°
28
70°
51°
29
70°
50°
30
71°
51°
1
71°
52°
2
73°
56°
3
77°
55°
4
73°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Harriston
Harriston's June 2026 forecast shows daily high temperatures ranging from 66° to 77°, with overnight lows between 43° and 60°. The average high for June is 73° with an average low of 52°. 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 Harriston. See also: July | August | September.
