S
M
T
W
T
F
S
30
77°
43°
31
87°
47°
1
68°
53°
2
61°
53°
3
68°
53°
4
61°
54°
5
72°
54°
6
65°
54°
7
74°
52°
8
80°
46°
9
86°
46°
10
86°
48°
11
73°
49°
12
67°
52°
13
70°
45°
14
76°
44°
15
77°
46°
16
83°
50°
17
83°
51°
18
80°
50°
19
73°
52°
20
75°
49°
21
74°
50°
22
76°
49°
23
77°
50°
24
74°
44°
25
67°
49°
26
66°
44°
27
66°
42°
28
67°
41°
29
66°
41°
30
66°
40°
1
68°
41°
2
69°
46°
3
67°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Eugene
Eugene's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 40° and 52°. The average high for September is 72° 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 Eugene. See also: October | November | December.
