S
M
T
W
T
F
S
26
74°
40°
27
68°
51°
28
62°
48°
29
76°
39°
30
81°
39°
1
85°
40°
2
86°
56°
3
91°
49°
4
82°
51°
5
76°
59°
6
78°
61°
7
78°
55°
8
73°
48°
9
83°
46°
10
74°
48°
11
82°
48°
12
88°
46°
13
65°
54°
14
68°
52°
15
65°
49°
16
62°
45°
17
69°
46°
18
75°
52°
19
76°
48°
20
77°
54°
21
84°
50°
22
87°
45°
23
76°
53°
24
78°
57°
25
68°
50°
26
66°
55°
27
76°
56°
28
80°
52°
29
74°
48°
30
73°
45°
31
68°
44°
1
74°
49°
2
84°
54°
3
83°
52°
4
82°
55°
5
74°
51°
6
76°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mosier
Mosier's May 2026 forecast shows daily high temperatures ranging from 66° to 84°, with overnight lows between 44° and 57°. The average high for May is 75° with an average low of 51°. 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 Mosier. See also: June | July | August.