S
M
T
W
T
F
S
26
86°
64°
27
87°
65°
28
86°
65°
29
87°
64°
30
84°
64°
31
80°
62°
1
80°
62°
2
78°
61°
3
80°
62°
4
80°
63°
5
81°
63°
6
80°
60°
7
79°
59°
8
80°
60°
9
78°
64°
10
78°
63°
11
79°
63°
12
79°
62°
13
80°
63°
14
79°
63°
15
79°
60°
16
78°
57°
17
78°
57°
18
79°
58°
19
78°
57°
20
81°
62°
21
82°
55°
22
77°
54°
23
76°
54°
24
77°
55°
25
78°
59°
26
82°
61°
27
84°
61°
28
82°
60°
29
85°
61°
30
86°
53°
31
76°
52°
1
76°
59°
2
78°
58°
3
76°
52°
4
79°
60°
5
83°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Northumberland
Northumberland's August 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 52° and 65°. The average high for August is 80° with an average low of 60°. 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 Northumberland. See also: September | October | November.
