S
M
T
W
T
F
S
30
79°
54°
31
84°
57°
1
84°
57°
2
83°
56°
3
84°
49°
4
83°
47°
5
76°
48°
6
77°
54°
7
79°
54°
8
81°
53°
9
82°
54°
10
77°
53°
11
81°
52°
12
81°
53°
13
80°
53°
14
79°
52°
15
81°
53°
16
81°
46°
17
79°
52°
18
78°
47°
19
78°
44°
20
73°
42°
21
70°
40°
22
69°
48°
23
70°
46°
24
74°
41°
25
68°
40°
26
68°
40°
27
70°
43°
28
75°
46°
29
74°
44°
30
74°
42°
1
67°
45°
2
67°
37°
3
67°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Katrine
Lake Katrine's September 2026 forecast shows daily high temperatures ranging from 67° to 84°, with overnight lows between 37° and 57°. The average high for September is 76° 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 Lake Katrine. See also: October | November | December.