S
M
T
W
T
F
S
30
87°
51°
31
83°
49°
1
79°
50°
2
81°
51°
3
84°
55°
4
84°
52°
5
86°
51°
6
80°
49°
7
80°
49°
8
80°
49°
9
Hist. Avg.
82°
53°
10
Hist. Avg.
82°
52°
11
Hist. Avg.
82°
52°
12
Hist. Avg.
81°
52°
13
Hist. Avg.
81°
51°
14
Hist. Avg.
81°
51°
15
Hist. Avg.
80°
50°
16
Hist. Avg.
80°
50°
17
Hist. Avg.
79°
50°
18
Hist. Avg.
79°
49°
19
Hist. Avg.
78°
49°
20
Hist. Avg.
78°
48°
21
Hist. Avg.
78°
48°
22
Hist. Avg.
77°
48°
23
Hist. Avg.
77°
47°
24
Hist. Avg.
76°
47°
25
Hist. Avg.
76°
46°
26
Hist. Avg.
75°
46°
27
Hist. Avg.
74°
45°
28
Hist. Avg.
74°
45°
29
Hist. Avg.
74°
44°
30
Hist. Avg.
73°
44°
1
Hist. Avg.
72°
44°
2
Hist. Avg.
72°
43°
3
Hist. Avg.
71°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Barr Lake
Barr Lake's September 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 49° and 55°. The average high for September is 82° with an average low of 51°. 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 Barr Lake. See also: October | November | December.
