S
M
T
W
T
F
S
30
89°
64°
31
91°
63°
1
91°
62°
2
92°
61°
3
91°
60°
4
89°
58°
5
89°
58°
6
88°
59°
7
88°
59°
8
89°
61°
9
89°
62°
10
88°
61°
11
90°
62°
12
87°
59°
13
86°
63°
14
91°
66°
15
Hist. Avg.
90°
63°
16
Hist. Avg.
90°
63°
17
Hist. Avg.
89°
63°
18
Hist. Avg.
89°
62°
19
Hist. Avg.
89°
62°
20
Hist. Avg.
88°
62°
21
Hist. Avg.
88°
62°
22
Hist. Avg.
88°
62°
23
Hist. Avg.
88°
61°
24
Hist. Avg.
87°
61°
25
Hist. Avg.
87°
61°
26
Hist. Avg.
87°
61°
27
Hist. Avg.
86°
61°
28
Hist. Avg.
86°
60°
29
Hist. Avg.
86°
60°
30
Hist. Avg.
86°
60°
1
Hist. Avg.
85°
60°
2
Hist. Avg.
85°
59°
3
Hist. Avg.
85°
59°
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 86° to 92°, with overnight lows between 58° and 66°. The average high for September is 89° with an average low of 61°. 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.
