S
M
T
W
T
F
S
26
72°
54°
27
70°
50°
28
72°
45°
29
81°
55°
30
72°
57°
1
68°
57°
2
59°
48°
3
68°
41°
4
78°
49°
5
79°
55°
6
84°
68°
7
77°
57°
8
67°
51°
9
78°
57°
10
80°
63°
11
79°
57°
12
73°
50°
13
79°
56°
14
80°
58°
15
83°
58°
16
80°
59°
17
83°
60°
18
80°
62°
19
79°
63°
20
85°
64°
21
84°
64°
22
79°
58°
23
79°
57°
24
78°
58°
25
80°
62°
26
80°
60°
27
81°
59°
28
80°
60°
29
81°
61°
30
82°
63°
31
81°
64°
1
82°
67°
2
85°
66°
3
82°
67°
4
82°
67°
5
84°
66°
6
84°
67°
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 67° to 85°, with overnight lows between 49° and 68°. The average high for May is 80° with an average low of 60°. 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.
