S
M
T
W
T
F
S
26
68°
56°
27
67°
57°
28
70°
58°
29
66°
53°
30
65°
48°
31
67°
55°
1
68°
53°
2
66°
53°
3
66°
52°
4
65°
53°
5
64°
54°
6
64°
52°
7
64°
54°
8
63°
53°
9
64°
53°
10
65°
54°
11
68°
57°
12
68°
57°
13
67°
56°
14
67°
55°
15
66°
56°
16
67°
56°
17
67°
55°
18
68°
56°
19
68°
56°
20
67°
55°
21
68°
55°
22
67°
56°
23
63°
55°
24
63°
54°
25
62°
53°
26
63°
52°
27
63°
54°
28
64°
55°
29
64°
56°
30
62°
55°
31
63°
54°
1
64°
54°
2
64°
55°
3
63°
55°
4
63°
54°
5
64°
53°
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 62° to 70°, with overnight lows between 48° and 58°. The average high for August is 65° 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.
