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
70°
51°
12
69°
54°
13
70°
50°
14
71°
46°
15
78°
48°
16
80°
47°
17
85°
48°
18
82°
50°
19
75°
49°
20
70°
48°
21
72°
49°
22
73°
49°
23
73°
48°
24
67°
45°
25
62°
50°
26
63°
46°
27
62°
42°
28
61°
42°
29
61°
40°
30
62°
40°
1
61°
49°
2
64°
48°
3
61°
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 85°, with overnight lows between 40° and 54°. The average high for September is 69° 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 Yelm. See also: October | November | December.
