S
M
T
W
T
F
S
30
78°
52°
31
79°
52°
1
85°
51°
2
81°
52°
3
80°
52°
4
78°
48°
5
77°
47°
6
77°
47°
7
82°
44°
8
78°
43°
9
81°
43°
10
80°
42°
11
78°
41°
12
79°
46°
13
78°
50°
14
85°
52°
15
87°
46°
16
82°
47°
17
83°
53°
18
83°
51°
19
79°
48°
20
82°
50°
21
83°
47°
22
77°
42°
23
74°
43°
24
74°
45°
25
75°
41°
26
78°
43°
27
77°
42°
28
73°
43°
29
77°
45°
30
76°
48°
1
77°
47°
2
81°
46°
3
79°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yoncalla
Yoncalla's September 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 41° and 53°. The average high for September is 79° 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 Yoncalla. See also: October | November | December.
