S
M
T
W
T
F
S
30
100°
68°
31
102°
71°
1
101°
71°
2
98°
75°
3
98°
75°
4
98°
75°
5
99°
71°
6
96°
72°
7
94°
73°
8
96°
72°
9
97°
74°
10
93°
68°
11
88°
64°
12
85°
65°
13
87°
66°
14
82°
61°
15
80°
58°
16
84°
63°
17
84°
63°
18
75°
59°
19
80°
62°
20
83°
62°
21
81°
61°
22
79°
61°
23
82°
59°
24
81°
60°
25
82°
60°
26
78°
54°
27
70°
49°
28
70°
48°
29
69°
49°
30
75°
52°
1
74°
56°
2
77°
51°
3
67°
54°
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 67° to 99°, with overnight lows between 48° and 75°. The average high for September is 84° with an average low of 62°. 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.
