S
M
T
W
T
F
S
31
85°
60°
1
71°
50°
2
74°
50°
3
69°
52°
4
62°
51°
5
71°
53°
6
73°
49°
7
76°
58°
8
72°
55°
9
75°
51°
10
66°
53°
11
63°
52°
12
55°
46°
13
65°
46°
14
72°
42°
15
68°
47°
16
66°
44°
17
62°
51°
18
65°
45°
19
62°
49°
20
66°
44°
21
66°
46°
22
62°
53°
23
59°
52°
24
69°
49°
25
74°
47°
26
76°
53°
27
72°
55°
28
72°
61°
29
72°
57°
30
60°
57°
1
65°
52°
2
65°
52°
3
65°
56°
4
78°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Welwyn
Welwyn's June 2026 forecast shows daily high temperatures ranging from 78° to 78°, with overnight lows between 61° and 61°. The average high for June is 78° with an average low of 61°. 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 Welwyn. See also: July | August | September.