S
M
T
W
T
F
S
26
84°
60°
27
76°
58°
28
68°
56°
29
83°
62°
30
74°
59°
1
68°
56°
2
70°
49°
3
70°
44°
4
78°
50°
5
81°
60°
6
79°
65°
7
71°
49°
8
69°
51°
9
73°
55°
10
77°
58°
11
73°
59°
12
72°
55°
13
76°
55°
14
78°
58°
15
80°
57°
16
77°
56°
17
76°
56°
18
77°
60°
19
79°
60°
20
78°
61°
21
75°
56°
22
77°
54°
23
73°
53°
24
74°
55°
25
75°
57°
26
76°
55°
27
74°
55°
28
75°
56°
29
76°
57°
30
78°
59°
31
77°
61°
1
79°
64°
2
78°
63°
3
78°
63°
4
78°
61°
5
82°
64°
6
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Roswell-Alpharetta
Roswell-Alpharetta's May 2026 forecast shows daily high temperatures ranging from 69° to 83°, with overnight lows between 44° and 65°. The average high for May is 76° with an average low of 57°. 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 Roswell-Alpharetta. See also: June | July | August.
