S
M
T
W
T
F
S
26
77°
48°
27
75°
55°
28
63°
50°
29
57°
41°
30
61°
36°
1
59°
36°
2
59°
41°
3
72°
45°
4
79°
50°
5
55°
45°
6
57°
39°
7
66°
39°
8
63°
48°
9
79°
52°
10
66°
43°
11
72°
45°
12
81°
52°
13
72°
50°
14
75°
45°
15
82°
64°
16
83°
65°
17
86°
70°
18
86°
64°
19
78°
48°
20
69°
52°
21
72°
52°
22
76°
53°
23
74°
54°
24
78°
59°
25
78°
59°
26
79°
60°
27
81°
63°
28
78°
60°
29
80°
58°
30
72°
57°
31
72°
56°
1
73°
54°
2
73°
55°
3
74°
60°
4
79°
63°
5
82°
65°
6
82°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Montrose
Montrose's May 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 48° and 70°. The average high for May is 78° with an average low of 59°. 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 Montrose. See also: June | July | August.