S
M
T
W
T
F
S
30
82°
49°
31
77°
55°
1
74°
54°
2
69°
50°
3
79°
49°
4
78°
54°
5
78°
47°
6
83°
47°
7
89°
46°
8
97°
51°
9
100°
60°
10
101°
64°
11
90°
51°
12
83°
53°
13
74°
55°
14
87°
47°
15
78°
47°
16
71°
57°
17
68°
53°
18
84°
50°
19
77°
54°
20
71°
51°
21
71°
55°
22
79°
55°
23
84°
46°
24
87°
52°
25
85°
51°
26
75°
44°
27
75°
49°
28
83°
45°
29
92°
46°
30
84°
49°
1
87°
48°
2
88°
54°
3
93°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Boulder Creek
Boulder Creek's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Boulder Creek. See also: October | November | December.
