S
M
T
W
T
F
S
30
73°
49°
31
80°
47°
1
69°
50°
2
70°
52°
3
68°
52°
4
72°
51°
5
73°
46°
6
76°
48°
7
74°
56°
8
76°
46°
9
83°
46°
10
73°
50°
11
69°
47°
12
67°
49°
13
62°
54°
14
69°
55°
15
68°
51°
16
78°
45°
17
80°
49°
18
75°
47°
19
74°
48°
20
72°
46°
21
72°
49°
22
71°
46°
23
71°
47°
24
70°
48°
25
71°
46°
26
69°
47°
27
68°
46°
28
70°
47°
29
66°
43°
30
61°
41°
1
62°
40°
2
63°
48°
3
62°
41°
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 80°, with overnight lows between 40° and 49°. The average high for September is 70° with an average low of 46°. 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.
