S
M
T
W
T
F
S
30
83°
57°
31
77°
57°
1
77°
58°
2
78°
57°
3
77°
62°
4
76°
56°
5
81°
56°
6
77°
55°
7
76°
54°
8
75°
55°
9
76°
55°
10
79°
60°
11
80°
61°
12
74°
59°
13
74°
60°
14
79°
60°
15
Hist. Avg.
76°
54°
16
Hist. Avg.
76°
54°
17
Hist. Avg.
75°
54°
18
Hist. Avg.
75°
53°
19
Hist. Avg.
75°
53°
20
Hist. Avg.
74°
52°
21
Hist. Avg.
74°
52°
22
Hist. Avg.
73°
52°
23
Hist. Avg.
73°
51°
24
Hist. Avg.
73°
51°
25
Hist. Avg.
72°
50°
26
Hist. Avg.
72°
50°
27
Hist. Avg.
71°
49°
28
Hist. Avg.
71°
49°
29
Hist. Avg.
70°
49°
30
Hist. Avg.
70°
48°
1
Hist. Avg.
70°
48°
2
Hist. Avg.
69°
47°
3
Hist. Avg.
69°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Upland
Upland's September 2026 forecast shows daily high temperatures ranging from 74° to 83°, with overnight lows between 54° and 62°. The average high for September is 77° with an average low of 58°. 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.
