S
M
T
W
T
F
S
26
69°
62°
27
69°
57°
28
81°
54°
29
92°
63°
30
91°
63°
31
N/A
1
77°
52°
2
82°
60°
3
92°
66°
4
87°
64°
5
84°
60°
6
82°
55°
7
79°
59°
8
74°
54°
9
73°
53°
10
77°
57°
11
80°
59°
12
78°
57°
13
74°
58°
14
75°
58°
15
76°
59°
16
76°
60°
17
77°
61°
18
78°
60°
19
74°
59°
20
75°
60°
21
74°
59°
22
73°
56°
23
68°
55°
24
72°
58°
25
71°
57°
26
73°
58°
27
74°
59°
28
73°
58°
29
70°
57°
30
71°
57°
31
67°
54°
1
69°
53°
2
64°
53°
3
65°
54°
4
66°
51°
5
63°
50°
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 63° to 92°, with overnight lows between 50° and 66°. The average high for August is 75° with an average low of 57°. 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.