S
M
T
W
T
F
S
26
81°
48°
27
81°
48°
28
81°
48°
29
81°
42°
30
81°
36°
1
81°
36°
2
81°
33°
3
81°
33°
4
81°
33°
5
81°
33°
6
81°
33°
7
81°
33°
8
81°
33°
9
81°
33°
10
81°
33°
11
81°
33°
12
81°
33°
13
81°
33°
14
81°
33°
15
81°
33°
16
81°
33°
17
84°
33°
18
84°
33°
19
84°
33°
20
84°
33°
21
84°
33°
22
84°
33°
23
84°
33°
24
84°
33°
25
84°
33°
26
77°
63°
27
73°
59°
28
78°
52°
29
77°
53°
30
77°
49°
31
73°
52°
1
76°
52°
2
78°
55°
3
77°
59°
4
79°
56°
5
81°
62°
6
82°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Upland
Upland's May 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 49° and 64°. The average high for May is 77° with an average low of 56°. 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 Upland. See also: June | July | August.
