S
M
T
W
T
F
S
30
88°
63°
31
83°
64°
1
86°
58°
2
82°
55°
3
78°
60°
4
85°
64°
5
86°
63°
6
87°
61°
7
85°
62°
8
83°
61°
9
79°
58°
10
81°
53°
11
75°
53°
12
76°
56°
13
77°
59°
14
80°
60°
15
78°
60°
16
80°
59°
17
79°
50°
18
79°
48°
19
72°
48°
20
71°
51°
21
72°
55°
22
77°
58°
23
78°
59°
24
79°
56°
25
80°
47°
26
78°
48°
27
68°
46°
28
67°
45°
29
68°
46°
30
68°
55°
1
78°
54°
2
Hist. Avg.
73°
51°
3
Hist. Avg.
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trimble
Trimble's September 2026 forecast shows daily high temperatures ranging from 67° to 88°, with overnight lows between 45° and 64°. The average high for September is 78° with an average low of 56°. 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 Trimble. See also: October | November | December.