S
M
T
W
T
F
S
26
82°
49°
27
84°
50°
28
83°
50°
29
85°
51°
30
86°
50°
31
86°
50°
1
85°
51°
2
87°
51°
3
86°
50°
4
86°
51°
5
85°
51°
6
86°
50°
7
86°
50°
8
85°
49°
9
86°
50°
10
86°
50°
11
85°
49°
12
85°
50°
13
83°
49°
14
85°
41°
15
84°
44°
16
83°
41°
17
79°
45°
18
85°
46°
19
82°
45°
20
80°
45°
21
80°
44°
22
83°
47°
23
85°
46°
24
83°
46°
25
83°
45°
26
82°
45°
27
83°
43°
28
79°
43°
29
76°
42°
30
73°
43°
31
77°
39°
1
79°
41°
2
81°
42°
3
81°
41°
4
80°
33°
5
72°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fontenelle
Fontenelle's August 2026 forecast shows daily high temperatures ranging from 72° to 87°, with overnight lows between 33° and 51°. The average high for August is 83° with an average low of 46°. 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 Fontenelle. See also: September | October | November.