S
M
T
W
T
F
S
30
78°
66°
31
78°
71°
1
80°
68°
2
73°
66°
3
N/A
4
85°
69°
5
82°
62°
6
75°
64°
7
79°
65°
8
79°
65°
9
78°
69°
10
82°
67°
11
77°
63°
12
76°
64°
13
77°
63°
14
79°
65°
15
82°
66°
16
81°
61°
17
74°
58°
18
71°
56°
19
78°
61°
20
78°
62°
21
76°
58°
22
75°
59°
23
71°
63°
24
76°
59°
25
73°
58°
26
76°
62°
27
75°
61°
28
73°
55°
29
66°
53°
30
67°
54°
1
66°
52°
2
65°
55°
3
64°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hewlett
Hewlett's September 2026 forecast shows daily high temperatures ranging from 64° to 85°, with overnight lows between 52° and 69°. The average high for September is 75° 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 Hewlett. See also: October | November | December.
