S
M
T
W
T
F
S
31
73°
51°
1
62°
54°
2
75°
51°
3
82°
56°
4
82°
57°
5
84°
58°
6
74°
59°
7
72°
57°
8
64°
55°
9
74°
55°
10
81°
61°
11
80°
66°
12
76°
64°
13
83°
64°
14
72°
56°
15
68°
54°
16
72°
58°
17
72°
58°
18
71°
60°
19
71°
58°
20
73°
55°
21
76°
58°
22
69°
55°
23
76°
56°
24
76°
59°
25
72°
59°
26
75°
58°
27
74°
59°
28
76°
62°
29
82°
67°
30
78°
65°
1
80°
66°
2
78°
65°
3
77°
60°
4
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in St. Catharines
St. Catharines's June 2026 forecast shows daily high temperatures ranging from 69° to 82°, with overnight lows between 55° and 67°. The average high for June is 76° with an average low of 60°. 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 St. Catharines. See also: July | August | September.
