S
M
T
W
T
F
S
26
58°
28°
27
54°
27°
28
65°
28°
29
68°
41°
30
71°
34°
1
77°
43°
2
79°
41°
3
81°
42°
4
79°
43°
5
77°
43°
6
80°
45°
7
78°
46°
8
77°
44°
9
74°
43°
10
77°
45°
11
75°
44°
12
77°
44°
13
76°
46°
14
68°
42°
15
62°
41°
16
65°
43°
17
63°
46°
18
62°
45°
19
61°
44°
20
62°
43°
21
63°
44°
22
62°
41°
23
63°
41°
24
65°
43°
25
68°
46°
26
73°
50°
27
74°
51°
28
73°
50°
29
71°
50°
30
74°
52°
31
68°
49°
1
67°
48°
2
68°
49°
3
73°
52°
4
68°
50°
5
70°
52°
6
71°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in La Grande
La Grande's May 2026 forecast shows daily high temperatures ranging from 61° to 81°, with overnight lows between 41° and 52°. The average high for May is 71° with an average low of 46°. 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 La Grande. See also: June | July | August.
