S
M
T
W
T
F
S
26
60°
49°
27
58°
47°
28
59°
51°
29
59°
49°
30
58°
50°
1
56°
51°
2
57°
50°
3
56°
51°
4
58°
51°
5
59°
52°
6
60°
51°
7
56°
49°
8
59°
48°
9
58°
49°
10
59°
48°
11
61°
48°
12
59°
48°
13
58°
47°
14
59°
48°
15
60°
50°
16
60°
51°
17
62°
49°
18
56°
45°
19
58°
46°
20
62°
49°
21
63°
52°
22
63°
49°
23
61°
50°
24
64°
52°
25
63°
51°
26
63°
50°
27
64°
52°
28
64°
52°
29
63°
51°
30
63°
52°
31
64°
53°
1
64°
53°
2
63°
52°
3
64°
53°
4
64°
51°
5
63°
50°
6
62°
50°
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 56° to 64°, with overnight lows between 45° and 53°. The average high for May is 61° with an average low of 50°. 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.
