S
M
T
W
T
F
S
30
93°
60°
31
95°
61°
1
96°
62°
2
96°
61°
3
95°
61°
4
95°
63°
5
94°
62°
6
94°
63°
7
93°
63°
8
94°
61°
9
92°
61°
10
87°
62°
11
93°
63°
12
87°
62°
13
87°
61°
14
84°
56°
15
85°
55°
16
84°
55°
17
Hist. Avg.
89°
58°
18
Hist. Avg.
89°
58°
19
Hist. Avg.
88°
58°
20
Hist. Avg.
88°
58°
21
Hist. Avg.
88°
58°
22
Hist. Avg.
88°
58°
23
Hist. Avg.
87°
57°
24
Hist. Avg.
87°
57°
25
Hist. Avg.
87°
57°
26
Hist. Avg.
86°
57°
27
Hist. Avg.
86°
56°
28
Hist. Avg.
86°
56°
29
Hist. Avg.
86°
56°
30
Hist. Avg.
85°
56°
1
Hist. Avg.
85°
56°
2
Hist. Avg.
84°
55°
3
Hist. Avg.
84°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hilmar
Hilmar's September 2026 forecast shows daily high temperatures ranging from 84° to 96°, with overnight lows between 55° and 63°. The average high for September is 91° with an average low of 61°. 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 Hilmar. See also: October | November | December.