S
M
T
W
T
F
S
26
84°
69°
27
85°
70°
28
85°
70°
29
86°
69°
30
85°
71°
31
86°
70°
1
85°
71°
2
88°
72°
3
90°
72°
4
91°
71°
5
90°
72°
6
90°
72°
7
89°
71°
8
89°
71°
9
85°
67°
10
84°
69°
11
85°
69°
12
87°
71°
13
90°
71°
14
90°
70°
15
89°
71°
16
85°
71°
17
90°
66°
18
90°
65°
19
89°
64°
20
90°
66°
21
91°
69°
22
90°
68°
23
90°
69°
24
87°
69°
25
84°
64°
26
84°
66°
27
85°
64°
28
83°
63°
29
83°
63°
30
84°
64°
31
84°
63°
1
85°
64°
2
86°
65°
3
84°
67°
4
88°
62°
5
84°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Alnwick
Alnwick's August 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 62° and 72°. The average high for August is 87° with an average low of 68°. 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 Alnwick. See also: September | October | November.