S
M
T
W
T
F
S
30
91°
72°
31
86°
66°
1
86°
64°
2
84°
63°
3
81°
61°
4
84°
61°
5
90°
64°
6
77°
66°
7
88°
72°
8
97°
75°
9
104°
79°
10
99°
79°
11
93°
75°
12
90°
68°
13
86°
66°
14
86°
64°
15
82°
64°
16
81°
63°
17
81°
63°
18
81°
61°
19
82°
59°
20
82°
63°
21
77°
63°
22
82°
63°
23
91°
64°
24
86°
64°
25
88°
66°
26
93°
68°
27
88°
72°
28
81°
64°
29
84°
63°
30
86°
63°
1
91°
66°
2
100°
75°
3
100°
79°
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 ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
