S
M
T
W
T
F
S
26
66°
27°
27
67°
33°
28
60°
44°
29
70°
36°
30
73°
35°
1
77°
35°
2
81°
49°
3
83°
39°
4
85°
45°
5
83°
51°
6
77°
53°
7
76°
49°
8
67°
49°
9
74°
44°
10
73°
41°
11
75°
47°
12
81°
37°
13
66°
48°
14
58°
41°
15
57°
37°
16
56°
38°
17
64°
40°
18
69°
46°
19
67°
42°
20
75°
49°
21
76°
39°
22
80°
41°
23
77°
49°
24
79°
54°
25
77°
43°
26
67°
47°
27
80°
51°
28
91°
58°
29
67°
49°
30
66°
47°
31
71°
50°
1
75°
49°
2
83°
56°
3
78°
51°
4
82°
55°
5
76°
51°
6
74°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ellensburg
Ellensburg's May 2026 forecast shows daily high temperatures ranging from 66° to 91°, with overnight lows between 47° and 58°. The average high for May is 76° with an average low of 52°. 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 Ellensburg. See also: June | July | August.
