S
M
T
W
T
F
S
26
71°
36°
27
57°
44°
28
61°
48°
29
72°
38°
30
80°
42°
1
75°
46°
2
72°
51°
3
91°
48°
4
74°
56°
5
65°
56°
6
68°
55°
7
71°
51°
8
69°
49°
9
79°
45°
10
70°
52°
11
81°
49°
12
83°
59°
13
64°
53°
14
64°
50°
15
59°
44°
16
55°
45°
17
64°
44°
18
72°
45°
19
70°
48°
20
69°
53°
21
84°
46°
22
82°
49°
23
74°
53°
24
75°
54°
25
61°
48°
26
63°
50°
27
71°
52°
28
78°
52°
29
67°
42°
30
65°
42°
31
68°
46°
1
80°
52°
2
82°
54°
3
76°
51°
4
78°
50°
5
79°
51°
6
70°
49°
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 61° to 82°, with overnight lows between 42° and 54°. The average high for May is 72° with an average low of 50°. 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.
