S
M
T
W
T
F
S
30
76°
58°
31
77°
62°
1
77°
62°
2
78°
61°
3
77°
54°
4
76°
52°
5
75°
54°
6
75°
53°
7
77°
54°
8
81°
56°
9
81°
59°
10
80°
52°
11
74°
52°
12
74°
56°
13
75°
51°
14
73°
50°
15
70°
50°
16
71°
51°
17
72°
50°
18
73°
49°
19
75°
49°
20
72°
53°
21
76°
50°
22
72°
55°
23
76°
55°
24
77°
54°
25
77°
55°
26
75°
55°
27
76°
54°
28
78°
54°
29
77°
52°
30
74°
53°
1
75°
54°
2
77°
47°
3
76°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Upland
Upland's September 2026 forecast shows daily high temperatures ranging from 70° to 81°, with overnight lows between 43° and 62°. The average high for September is 76° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Upland. See also: October | November | December.
