S
M
T
W
T
F
S
26
85°
64°
27
85°
64°
28
84°
63°
29
84°
63°
30
83°
59°
31
76°
56°
1
76°
56°
2
77°
57°
3
78°
60°
4
79°
59°
5
80°
59°
6
83°
62°
7
80°
62°
8
78°
61°
9
79°
61°
10
78°
54°
11
78°
55°
12
82°
58°
13
83°
61°
14
84°
62°
15
83°
61°
16
80°
62°
17
84°
62°
18
82°
59°
19
78°
53°
20
76°
52°
21
75°
52°
22
76°
53°
23
75°
52°
24
76°
52°
25
79°
53°
26
81°
52°
27
81°
52°
28
80°
57°
29
78°
57°
30
74°
54°
31
80°
56°
1
80°
49°
2
75°
48°
3
72°
49°
4
75°
54°
5
77°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Guilderland
Guilderland's August 2026 forecast shows daily high temperatures ranging from 72° to 85°, with overnight lows between 48° and 64°. The average high for August is 79° 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 Guilderland. See also: September | October | November.