S
M
T
W
T
F
S
30
76°
49°
31
75°
48°
1
74°
48°
2
74°
50°
3
75°
50°
4
73°
52°
5
74°
49°
6
73°
50°
7
71°
48°
8
70°
47°
9
70°
47°
10
72°
53°
11
70°
47°
12
70°
46°
13
74°
45°
14
73°
52°
15
74°
52°
16
70°
46°
17
69°
44°
18
74°
44°
19
75°
51°
20
74°
51°
21
75°
50°
22
71°
48°
23
73°
44°
24
68°
43°
25
66°
48°
26
67°
41°
27
71°
41°
28
62°
40°
29
61°
41°
30
61°
40°
1
Hist. Avg.
66°
43°
2
Hist. Avg.
66°
43°
3
Hist. Avg.
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in White River Junction
White River Junction's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 40° and 53°. The average high for September is 71° with an average low of 47°. 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 White River Junction. See also: October | November | December.
