S
M
T
W
T
F
S
26
72°
38°
27
58°
43°
28
61°
46°
29
72°
40°
30
83°
46°
1
76°
49°
2
72°
49°
3
93°
50°
4
75°
54°
5
65°
53°
6
73°
49°
7
73°
52°
8
68°
51°
9
76°
51°
10
75°
50°
11
78°
49°
12
81°
48°
13
81°
46°
14
82°
48°
15
80°
48°
16
75°
47°
17
73°
49°
18
74°
46°
19
71°
47°
20
64°
42°
21
65°
49°
22
66°
43°
23
68°
45°
24
73°
46°
25
72°
47°
26
66°
43°
27
66°
43°
28
70°
49°
29
69°
52°
30
72°
51°
31
76°
52°
1
78°
53°
2
77°
48°
3
67°
45°
4
75°
49°
5
76°
46°
6
67°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Tigard
Tigard's May 2026 forecast shows daily high temperatures ranging from 64° to 82°, with overnight lows between 42° and 53°. The average high for May is 73° with an average low of 48°. 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 Tigard. See also: June | July | August.