S
M
T
W
T
F
S
30
76°
51°
31
82°
53°
1
83°
53°
2
82°
54°
3
83°
52°
4
83°
53°
5
83°
51°
6
83°
51°
7
84°
52°
8
83°
53°
9
74°
52°
10
75°
46°
11
73°
48°
12
72°
44°
13
72°
43°
14
74°
51°
15
73°
44°
16
71°
45°
17
72°
48°
18
73°
51°
19
78°
52°
20
80°
47°
21
70°
41°
22
70°
44°
23
71°
47°
24
72°
50°
25
76°
51°
26
79°
50°
27
78°
51°
28
79°
50°
29
78°
42°
30
73°
47°
1
71°
48°
2
75°
41°
3
64°
39°
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 84°, with overnight lows between 39° and 54°. The average high for September is 76° with an average low of 48°. 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.
