S
M
T
W
T
F
S
30
88°
56°
31
88°
56°
1
88°
55°
2
90°
57°
3
92°
56°
4
87°
55°
5
86°
53°
6
87°
50°
7
86°
51°
8
88°
52°
9
87°
50°
10
88°
51°
11
90°
51°
12
86°
52°
13
87°
55°
14
91°
55°
15
Hist. Avg.
86°
49°
16
Hist. Avg.
86°
49°
17
Hist. Avg.
85°
49°
18
Hist. Avg.
85°
49°
19
Hist. Avg.
85°
49°
20
Hist. Avg.
85°
48°
21
Hist. Avg.
84°
48°
22
Hist. Avg.
84°
48°
23
Hist. Avg.
84°
48°
24
Hist. Avg.
83°
48°
25
Hist. Avg.
83°
47°
26
Hist. Avg.
83°
47°
27
Hist. Avg.
82°
47°
28
Hist. Avg.
82°
47°
29
Hist. Avg.
82°
47°
30
Hist. Avg.
82°
47°
1
Hist. Avg.
81°
46°
2
Hist. Avg.
81°
46°
3
Hist. Avg.
81°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Upper Lake-Nice
Upper Lake-Nice's September 2026 forecast shows daily high temperatures ranging from 86° to 92°, with overnight lows between 50° and 57°. The average high for September is 88° with an average low of 53°. 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 Upper Lake-Nice. See also: October | November | December.
