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
95°
62°
12
88°
54°
13
83°
53°
14
87°
56°
15
89°
56°
16
88°
57°
17
89°
58°
18
88°
59°
19
87°
57°
20
88°
60°
21
89°
61°
22
89°
62°
23
92°
63°
24
87°
58°
25
80°
55°
26
84°
60°
27
80°
56°
28
81°
54°
29
83°
57°
30
87°
60°
1
88°
60°
2
88°
59°
3
87°
59°
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 80° to 95°, with overnight lows between 53° and 63°. The average high for September is 87° 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 Loomis. See also: October | November | December.