S
M
T
W
T
F
S
30
87°
50°
31
85°
49°
1
85°
50°
2
86°
47°
3
85°
48°
4
84°
49°
5
84°
48°
6
83°
48°
7
82°
49°
8
83°
47°
9
83°
47°
10
84°
46°
11
84°
46°
12
83°
50°
13
82°
50°
14
85°
51°
15
87°
52°
16
84°
47°
17
81°
51°
18
80°
53°
19
86°
53°
20
87°
50°
21
87°
47°
22
84°
50°
23
85°
47°
24
84°
48°
25
85°
46°
26
83°
44°
27
78°
48°
28
74°
42°
29
75°
43°
30
Hist. Avg.
79°
47°
1
Hist. Avg.
79°
46°
2
Hist. Avg.
78°
46°
3
Hist. Avg.
78°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Grants Pass
Grants Pass's September 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 42° and 53°. The average high for September is 83° 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 Grants Pass. See also: October | November | December.
