S
M
T
W
T
F
S
30
76°
49°
31
73°
51°
1
72°
51°
2
74°
50°
3
78°
54°
4
74°
50°
5
73°
48°
6
72°
50°
7
69°
45°
8
75°
50°
9
77°
54°
10
78°
53°
11
75°
52°
12
67°
51°
13
67°
44°
14
69°
44°
15
72°
48°
16
73°
45°
17
74°
48°
18
68°
44°
19
71°
45°
20
73°
48°
21
72°
51°
22
67°
48°
23
64°
44°
24
63°
49°
25
64°
47°
26
69°
50°
27
66°
49°
28
64°
45°
29
64°
41°
30
68°
46°
1
61°
41°
2
70°
47°
3
61°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yelm
Yelm's September 2026 forecast shows daily high temperatures ranging from 61° to 78°, with overnight lows between 41° and 54°. The average high for September is 70° with an average low of 48°. 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 Yelm. See also: October | November | December.
