S
M
T
W
T
F
S
26
62°
42°
27
60°
44°
28
64°
47°
29
49°
36°
30
48°
32°
1
46°
31°
2
62°
26°
3
73°
45°
4
76°
44°
5
56°
37°
6
55°
35°
7
56°
37°
8
67°
33°
9
64°
40°
10
61°
33°
11
58°
32°
12
75°
39°
13
64°
40°
14
71°
35°
15
83°
52°
16
85°
56°
17
54°
52°
18
78°
59°
19
66°
42°
20
58°
36°
21
59°
40°
22
61°
44°
23
65°
47°
24
71°
51°
25
70°
50°
26
72°
48°
27
72°
50°
28
75°
51°
29
76°
51°
30
71°
48°
31
73°
52°
1
74°
54°
2
73°
53°
3
65°
51°
4
66°
50°
5
72°
55°
6
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gresham
Gresham's May 2026 forecast shows daily high temperatures ranging from 54° to 78°, with overnight lows between 36° and 59°. The average high for May is 69° with an average low of 49°. 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 Gresham. See also: June | July | August.
