S
M
T
W
T
F
S
26
69°
62°
27
69°
57°
28
81°
54°
29
92°
63°
30
91°
63°
31
79°
61°
1
75°
51°
2
83°
61°
3
90°
67°
4
88°
66°
5
83°
61°
6
79°
53°
7
76°
55°
8
74°
54°
9
73°
53°
10
77°
56°
11
78°
56°
12
80°
57°
13
82°
58°
14
75°
58°
15
74°
60°
16
73°
59°
17
72°
59°
18
73°
58°
19
68°
53°
20
67°
53°
21
67°
54°
22
68°
52°
23
67°
52°
24
66°
53°
25
72°
58°
26
73°
58°
27
72°
57°
28
71°
54°
29
70°
53°
30
72°
55°
31
72°
54°
1
71°
57°
2
70°
56°
3
65°
53°
4
65°
51°
5
66°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Gronau
Gronau's August 2026 forecast shows daily high temperatures ranging from 65° to 90°, with overnight lows between 51° and 67°. The average high for August is 74° with an average low of 56°. 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 Gronau. See also: September | October | November.