S
M
T
W
T
F
S
26
66°
56°
27
65°
55°
28
66°
56°
29
66°
56°
30
65°
55°
31
65°
53°
1
62°
52°
2
63°
54°
3
62°
54°
4
63°
55°
5
65°
56°
6
65°
55°
7
67°
55°
8
65°
55°
9
64°
53°
10
65°
54°
11
67°
54°
12
66°
53°
13
64°
55°
14
64°
54°
15
65°
53°
16
66°
54°
17
64°
55°
18
66°
56°
19
66°
52°
20
62°
52°
21
61°
51°
22
61°
51°
23
60°
52°
24
60°
52°
25
61°
53°
26
65°
54°
27
66°
55°
28
67°
56°
29
67°
55°
30
66°
56°
31
67°
54°
1
66°
52°
2
66°
55°
3
67°
55°
4
67°
54°
5
66°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Eureka
Eureka's August 2026 forecast shows daily high temperatures ranging from 60° to 67°, with overnight lows between 51° and 56°. 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 Eureka. See also: September | October | November.
