S
M
T
W
T
F
S
30
59°
36°
31
58°
43°
1
58°
33°
2
62°
32°
3
62°
37°
4
59°
53°
5
61°
51°
6
58°
47°
7
61°
53°
8
58°
41°
9
64°
46°
10
61°
46°
11
62°
50°
12
62°
47°
13
62°
44°
14
61°
45°
15
60°
44°
16
61°
44°
17
61°
43°
18
62°
43°
19
58°
41°
20
56°
43°
21
55°
36°
22
54°
38°
23
56°
40°
24
57°
39°
25
52°
38°
26
52°
38°
27
50°
36°
28
47°
34°
29
48°
36°
30
47°
37°
1
49°
38°
2
50°
35°
3
47°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tyonek
Tyonek's September 2026 forecast shows daily high temperatures ranging from 47° to 64°, with overnight lows between 32° and 50°. The average high for September is 56° with an average low of 41°. 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 Tyonek. See also: October | November | December.