S
M
T
W
T
F
S
26
84°
53°
27
87°
55°
28
83°
64°
29
79°
64°
30
82°
63°
31
82°
60°
1
90°
61°
2
86°
68°
3
81°
63°
4
87°
58°
5
87°
56°
6
92°
68°
7
93°
70°
8
91°
66°
9
90°
62°
10
87°
57°
11
86°
62°
12
85°
63°
13
83°
58°
14
84°
58°
15
82°
54°
16
80°
66°
17
79°
57°
18
81°
56°
19
83°
60°
20
80°
59°
21
81°
60°
22
81°
59°
23
76°
56°
24
77°
54°
25
76°
55°
26
80°
58°
27
82°
60°
28
74°
52°
29
74°
51°
30
78°
56°
31
81°
58°
1
77°
58°
2
81°
59°
3
82°
59°
4
80°
58°
5
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Northampton
Northampton's August 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 51° and 66°. The average high for August is 80° with an average low of 58°. 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 Northampton. See also: September | October | November.