S
M
T
W
T
F
S
30
75°
52°
31
78°
54°
1
79°
55°
2
79°
54°
3
77°
53°
4
77°
54°
5
76°
53°
6
74°
52°
7
70°
47°
8
72°
48°
9
76°
52°
10
76°
53°
11
68°
48°
12
75°
52°
13
77°
55°
14
78°
53°
15
75°
53°
16
76°
52°
17
76°
53°
18
75°
52°
19
73°
46°
20
72°
46°
21
70°
50°
22
73°
46°
23
67°
42°
24
66°
41°
25
64°
44°
26
67°
46°
27
71°
49°
28
71°
47°
29
72°
49°
30
71°
45°
1
69°
47°
2
68°
48°
3
69°
44°
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 64° to 79°, with overnight lows between 41° and 55°. The average high for September is 73° with an average low of 50°. 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.
