S
M
T
W
T
F
S
31
66°
41°
1
70°
37°
2
70°
36°
3
74°
40°
4
78°
52°
5
81°
55°
6
77°
60°
7
67°
55°
8
78°
44°
9
83°
51°
10
82°
70°
11
83°
66°
12
82°
59°
13
79°
56°
14
72°
60°
15
62°
52°
16
73°
49°
17
75°
54°
18
72°
60°
19
69°
58°
20
68°
53°
21
72°
49°
22
67°
52°
23
70°
51°
24
72°
46°
25
76°
59°
26
71°
59°
27
79°
53°
28
84°
53°
29
89°
65°
30
86°
74°
1
88°
72°
2
92°
71°
3
85°
70°
4
85°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Watertown
Watertown's June 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 65° and 74°. The average high for June is 88° with an average low of 70°. 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 Watertown. See also: July | August | September.