S
M
T
W
T
F
S
30
74°
52°
31
78°
54°
1
68°
57°
2
68°
59°
3
72°
59°
4
72°
54°
5
67°
49°
6
66°
51°
7
68°
52°
8
66°
50°
9
65°
51°
10
67°
54°
11
68°
53°
12
69°
53°
13
66°
50°
14
64°
48°
15
64°
46°
16
67°
52°
17
69°
47°
18
61°
44°
19
61°
42°
20
68°
49°
21
70°
52°
22
70°
52°
23
69°
50°
24
68°
49°
25
68°
47°
26
69°
48°
27
68°
49°
28
69°
47°
29
65°
42°
30
56°
38°
1
56°
38°
2
60°
46°
3
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Barnard
Barnard's September 2026 forecast shows daily high temperatures ranging from 56° to 72°, with overnight lows between 38° and 59°. The average high for September is 66° with an average low of 49°. 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 Barnard. See also: October | November | December.