S
M
T
W
T
F
S
30
87°
56°
31
76°
55°
1
72°
54°
2
73°
53°
3
70°
58°
4
73°
54°
5
77°
51°
6
79°
53°
7
84°
56°
8
92°
59°
9
97°
69°
10
100°
72°
11
90°
66°
12
88°
54°
13
80°
52°
14
87°
58°
15
89°
56°
16
90°
57°
17
89°
58°
18
90°
59°
19
89°
57°
20
88°
60°
21
89°
61°
22
89°
62°
23
92°
62°
24
90°
63°
25
86°
55°
26
84°
60°
27
80°
56°
28
79°
53°
29
82°
54°
30
82°
55°
1
86°
58°
2
83°
55°
3
84°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Loomis
Loomis's September 2026 forecast shows daily high temperatures ranging from 79° to 92°, with overnight lows between 52° and 63°. The average high for September is 86° with an average low of 57°. 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 Loomis. See also: October | November | December.