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
79°
47°
17
83°
48°
18
71°
49°
19
69°
46°
20
78°
44°
21
73°
52°
22
74°
48°
23
75°
48°
24
78°
55°
25
64°
43°
26
69°
45°
27
72°
44°
28
70°
45°
29
70°
47°
30
67°
46°
1
66°
45°
2
68°
46°
3
68°
47°
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 64° to 78°, with overnight lows between 43° and 55°. The average high for September is 70° 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.
