S
M
T
W
T
F
S
30
87°
57°
31
86°
60°
1
86°
59°
2
87°
59°
3
85°
60°
4
85°
59°
5
86°
58°
6
86°
58°
7
92°
56°
8
89°
54°
9
87°
54°
10
86°
53°
11
85°
52°
12
86°
53°
13
85°
54°
14
87°
60°
15
87°
61°
16
84°
60°
17
91°
61°
18
91°
59°
19
89°
60°
20
91°
59°
21
91°
56°
22
87°
54°
23
84°
55°
24
84°
55°
25
82°
59°
26
86°
55°
27
89°
56°
28
87°
57°
29
88°
58°
30
87°
61°
1
88°
62°
2
90°
61°
3
88°
61°
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 82° to 92°, with overnight lows between 52° and 62°. 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.