S
M
T
W
T
F
S
26
62°
51°
27
69°
42°
28
63°
43°
29
65°
55°
30
71°
52°
1
68°
41°
2
59°
43°
3
64°
36°
4
78°
41°
5
82°
56°
6
72°
63°
7
65°
48°
8
71°
40°
9
76°
47°
10
85°
54°
11
63°
41°
12
74°
38°
13
78°
45°
14
67°
47°
15
75°
44°
16
87°
61°
17
94°
64°
18
94°
64°
19
97°
66°
20
95°
64°
21
72°
54°
22
62°
54°
23
72°
56°
24
76°
60°
25
75°
59°
26
80°
59°
27
79°
60°
28
79°
60°
29
80°
56°
30
83°
62°
31
82°
61°
1
82°
63°
2
81°
63°
3
78°
62°
4
79°
62°
5
78°
59°
6
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Eureka
Eureka's May 2026 forecast shows daily high temperatures ranging from 62° to 97°, with overnight lows between 54° and 66°. The average high for May is 81° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Eureka. See also: June | July | August.
