S
M
T
W
T
F
S
30
89°
64°
31
90°
62°
1
90°
61°
2
91°
60°
3
89°
58°
4
87°
59°
5
86°
59°
6
86°
60°
7
88°
61°
8
90°
59°
9
88°
58°
10
87°
58°
11
87°
60°
12
88°
62°
13
89°
63°
14
92°
63°
15
92°
64°
16
91°
66°
17
93°
63°
18
93°
64°
19
90°
64°
20
91°
62°
21
90°
61°
22
89°
59°
23
84°
61°
24
86°
60°
25
90°
62°
26
84°
59°
27
80°
60°
28
82°
61°
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 80° to 93°, with overnight lows between 58° and 66°. The average high for September is 88° 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.
