S
M
T
W
T
F
S
30
73°
45°
31
76°
45°
1
78°
40°
2
74°
38°
3
71°
39°
4
73°
40°
5
77°
43°
6
78°
46°
7
79°
42°
8
73°
39°
9
72°
38°
10
72°
41°
11
76°
45°
12
79°
37°
13
76°
41°
14
78°
44°
15
81°
45°
16
80°
43°
17
78°
40°
18
69°
39°
19
74°
37°
20
76°
40°
21
76°
41°
22
75°
41°
23
75°
40°
24
74°
41°
25
71°
39°
26
73°
39°
27
73°
38°
28
72°
38°
29
72°
39°
30
73°
39°
1
73°
37°
2
66°
31°
3
62°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Nathrop
Nathrop's September 2026 forecast shows daily high temperatures ranging from 62° to 81°, with overnight lows between 29° and 46°. The average high for September is 74° with an average low of 40°. 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 Nathrop. See also: October | November | December.