S
M
T
W
T
F
S
26
81°
61°
27
82°
54°
28
76°
56°
29
77°
60°
30
76°
58°
31
76°
53°
1
77°
54°
2
75°
53°
3
75°
54°
4
76°
53°
5
75°
52°
6
75°
55°
7
77°
58°
8
77°
59°
9
76°
62°
10
79°
56°
11
78°
61°
12
83°
60°
13
79°
58°
14
83°
53°
15
75°
52°
16
74°
56°
17
75°
53°
18
74°
51°
19
73°
52°
20
73°
52°
21
74°
54°
22
73°
51°
23
72°
54°
24
73°
57°
25
74°
52°
26
73°
60°
27
79°
60°
28
79°
59°
29
81°
52°
30
80°
50°
31
71°
49°
1
71°
49°
2
70°
57°
3
74°
52°
4
74°
48°
5
68°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Lynden
Lynden's August 2026 forecast shows daily high temperatures ranging from 68° to 83°, with overnight lows between 48° and 62°. The average high for August is 76° with an average low of 55°. 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 Lynden. See also: September | October | November.