S
M
T
W
T
F
S
30
76°
49°
31
77°
51°
1
76°
50°
2
77°
51°
3
77°
45°
4
75°
47°
5
74°
50°
6
75°
47°
7
76°
47°
8
74°
40°
9
66°
44°
10
66°
37°
11
68°
40°
12
69°
39°
13
63°
37°
14
63°
35°
15
62°
34°
16
64°
37°
17
63°
42°
18
61°
37°
19
62°
39°
20
61°
39°
21
66°
36°
22
65°
35°
23
66°
36°
24
Hist. Avg.
70°
40°
25
Hist. Avg.
69°
40°
26
Hist. Avg.
69°
40°
27
Hist. Avg.
68°
39°
28
Hist. Avg.
68°
39°
29
Hist. Avg.
67°
38°
30
Hist. Avg.
67°
38°
1
Hist. Avg.
66°
38°
2
Hist. Avg.
66°
38°
3
Hist. Avg.
65°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Nelson
Nelson's September 2026 forecast shows daily high temperatures ranging from 61° to 77°, with overnight lows between 34° and 51°. The average high for September is 69° with an average low of 42°. 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 Nelson. See also: October | November | December.
