S
M
T
W
T
F
S
26
97°
74°
27
97°
74°
28
96°
73°
29
96°
71°
30
95°
72°
31
94°
71°
1
92°
70°
2
93°
70°
3
88°
69°
4
93°
70°
5
92°
71°
6
94°
72°
7
95°
72°
8
95°
71°
9
90°
71°
10
90°
70°
11
92°
70°
12
93°
69°
13
93°
71°
14
94°
70°
15
95°
69°
16
94°
66°
17
92°
67°
18
93°
62°
19
85°
61°
20
85°
60°
21
84°
60°
22
84°
61°
23
91°
60°
24
89°
65°
25
92°
68°
26
94°
67°
27
94°
68°
28
93°
68°
29
93°
67°
30
92°
66°
31
92°
65°
1
91°
59°
2
86°
57°
3
82°
60°
4
89°
66°
5
91°
65°
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 82° to 97°, with overnight lows between 57° and 74°. The average high for August is 92° with an average low of 67°. 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.
