S
M
T
W
T
F
S
30
86°
64°
31
84°
66°
1
86°
66°
2
86°
65°
3
85°
65°
4
86°
61°
5
83°
60°
6
80°
61°
7
79°
59°
8
78°
60°
9
78°
60°
10
80°
63°
11
81°
63°
12
82°
64°
13
84°
64°
14
84°
62°
15
82°
61°
16
81°
64°
17
82°
65°
18
84°
65°
19
85°
64°
20
85°
64°
21
84°
65°
22
83°
64°
23
80°
61°
24
78°
58°
25
79°
57°
26
77°
59°
27
77°
62°
28
80°
61°
29
81°
60°
30
80°
57°
1
Hist. Avg.
84°
59°
2
Hist. Avg.
84°
59°
3
Hist. Avg.
83°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lemon Grove
Lemon Grove's September 2026 forecast shows daily high temperatures ranging from 77° to 86°, with overnight lows between 57° and 66°. The average high for September is 82° with an average low of 62°. 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 Lemon Grove. See also: October | November | December.
