S
M
T
W
T
F
S
30
78°
52°
31
77°
54°
1
79°
54°
2
78°
55°
3
79°
53°
4
77°
53°
5
78°
49°
6
79°
49°
7
78°
53°
8
75°
55°
9
74°
54°
10
68°
47°
11
67°
44°
12
66°
44°
13
67°
45°
14
70°
50°
15
66°
41°
16
64°
42°
17
66°
52°
18
66°
51°
19
67°
53°
20
74°
47°
21
67°
42°
22
63°
41°
23
63°
44°
24
65°
47°
25
67°
52°
26
72°
51°
27
71°
52°
28
72°
50°
29
71°
40°
30
62°
44°
1
66°
46°
2
66°
41°
3
59°
39°
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 59° to 79°, with overnight lows between 39° and 55°. 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.
