S
M
T
W
T
F
S
26
67°
56°
27
68°
57°
28
69°
58°
29
68°
57°
30
68°
56°
31
67°
55°
1
68°
56°
2
67°
57°
3
68°
57°
4
68°
56°
5
67°
54°
6
64°
53°
7
63°
55°
8
64°
51°
9
63°
52°
10
62°
55°
11
65°
55°
12
68°
52°
13
64°
50°
14
63°
50°
15
62°
51°
16
63°
56°
17
66°
55°
18
68°
54°
19
68°
56°
20
67°
54°
21
65°
53°
22
66°
56°
23
68°
57°
24
69°
57°
25
70°
56°
26
70°
57°
27
69°
52°
28
69°
50°
29
63°
50°
30
63°
55°
31
62°
53°
1
63°
50°
2
62°
50°
3
61°
51°
4
64°
56°
5
63°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Arcata
Arcata's August 2026 forecast shows daily high temperatures ranging from 61° to 70°, with overnight lows between 50° and 58°. The average high for August is 66° with an average low of 54°. 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 Arcata. See also: September | October | November.
