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
72°
43°
12
66°
50°
13
68°
50°
14
72°
47°
15
67°
44°
16
83°
49°
17
81°
53°
18
76°
47°
19
76°
48°
20
77°
49°
21
75°
48°
22
73°
46°
23
77°
50°
24
74°
51°
25
71°
48°
26
72°
49°
27
74°
47°
28
73°
48°
29
72°
45°
30
66°
44°
1
67°
40°
2
66°
46°
3
66°
42°
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 53°. The average high for September is 73° 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 Eugene. See also: October | November | December.
