S
M
T
W
T
F
S
26
73°
61°
27
75°
57°
28
81°
61°
29
82°
57°
30
73°
57°
31
N/A
1
72°
50°
2
77°
57°
3
82°
60°
4
74°
59°
5
75°
55°
6
73°
56°
7
72°
55°
8
71°
54°
9
73°
57°
10
74°
58°
11
74°
57°
12
75°
56°
13
72°
56°
14
74°
58°
15
73°
57°
16
73°
57°
17
72°
56°
18
71°
57°
19
71°
57°
20
70°
56°
21
69°
56°
22
67°
54°
23
67°
56°
24
66°
56°
25
67°
55°
26
68°
56°
27
69°
55°
28
67°
54°
29
65°
55°
30
65°
54°
31
66°
51°
1
63°
51°
2
64°
54°
3
64°
52°
4
63°
49°
5
63°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ilminster
Ilminster's August 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 49° and 60°. The average high for August is 70° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Ilminster. See also: September | October | November.