S
M
T
W
T
F
S
30
72°
49°
31
71°
48°
1
69°
48°
2
68°
47°
3
69°
47°
4
68°
46°
5
68°
47°
6
69°
48°
7
68°
50°
8
69°
49°
9
69°
48°
10
70°
48°
11
68°
49°
12
68°
53°
13
69°
54°
14
73°
54°
15
73°
53°
16
72°
53°
17
70°
54°
18
71°
55°
19
74°
54°
20
73°
52°
21
73°
52°
22
72°
51°
23
72°
50°
24
70°
51°
25
71°
52°
26
72°
52°
27
Hist. Avg.
80°
47°
28
Hist. Avg.
80°
47°
29
Hist. Avg.
79°
47°
30
Hist. Avg.
79°
47°
1
Hist. Avg.
78°
46°
2
Hist. Avg.
78°
46°
3
Hist. Avg.
77°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Whitethorn
Whitethorn's September 2026 forecast shows daily high temperatures ranging from 68° to 74°, with overnight lows between 46° and 55°. The average high for September is 70° with an average low of 51°. 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 Whitethorn. See also: October | November | December.
