S
M
T
W
T
F
S
26
68°
26°
27
74°
28°
28
66°
29°
29
63°
30°
30
49°
42°
1
55°
29°
2
49°
27°
3
49°
27°
4
63°
24°
5
79°
31°
6
59°
43°
7
57°
28°
8
50°
26°
9
59°
23°
10
66°
33°
11
55°
27°
12
52°
24°
13
N/A
14
56°
45°
15
59°
42°
16
71°
50°
17
68°
33°
18
66°
46°
19
81°
55°
20
67°
36°
21
59°
37°
22
61°
39°
23
63°
42°
24
62°
43°
25
61°
45°
26
65°
41°
27
62°
39°
28
61°
40°
29
62°
45°
30
62°
46°
31
63°
47°
1
64°
46°
2
62°
43°
3
62°
42°
4
63°
41°
5
64°
48°
6
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Upper Dam
Upper Dam's May 2026 forecast shows daily high temperatures ranging from 56° to 81°, with overnight lows between 33° and 55°. The average high for May is 64° with an average low of 43°. 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 Upper Dam. See also: June | July | August.
