S
M
T
W
T
F
S
26
81°
61°
27
81°
59°
28
73°
66°
29
71°
64°
30
74°
58°
31
82°
55°
1
82°
60°
2
75°
68°
3
73°
54°
4
84°
52°
5
87°
57°
6
85°
68°
7
85°
66°
8
84°
62°
9
79°
61°
10
80°
64°
11
81°
55°
12
79°
59°
13
79°
57°
14
73°
53°
15
74°
57°
16
73°
59°
17
74°
56°
18
76°
58°
19
76°
58°
20
78°
59°
21
79°
62°
22
74°
58°
23
76°
59°
24
73°
53°
25
74°
54°
26
78°
58°
27
80°
59°
28
81°
55°
29
72°
51°
30
71°
50°
31
70°
50°
1
72°
55°
2
73°
56°
3
74°
57°
4
71°
56°
5
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ithaca
Ithaca's August 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 50° and 64°. The average high for August is 75° 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 Ithaca. See also: September | October | November.