S
M
T
W
T
F
S
26
68°
27°
27
72°
49°
28
71°
43°
29
76°
42°
30
77°
44°
1
78°
50°
2
76°
52°
3
77°
51°
4
76°
53°
5
79°
52°
6
77°
53°
7
74°
52°
8
71°
50°
9
73°
52°
10
71°
47°
11
65°
46°
12
68°
47°
13
74°
51°
14
76°
53°
15
78°
53°
16
78°
52°
17
66°
46°
18
74°
53°
19
76°
53°
20
76°
54°
21
71°
54°
22
67°
47°
23
68°
50°
24
74°
53°
25
79°
55°
26
78°
54°
27
78°
55°
28
68°
46°
29
74°
53°
30
74°
50°
31
69°
48°
1
69°
46°
2
72°
51°
3
80°
58°
4
80°
57°
5
79°
56°
6
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Umatilla
Umatilla's May 2026 forecast shows daily high temperatures ranging from 65° to 80°, with overnight lows between 42° and 58°. The average high for May is 74° with an average low of 51°. 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 Umatilla. See also: June | July | August.
