S
M
T
W
T
F
S
30
100°
80°
31
100°
81°
1
100°
77°
2
102°
79°
3
100°
82°
4
100°
81°
5
99°
80°
6
100°
80°
7
101°
79°
8
100°
81°
9
98°
80°
10
102°
79°
11
101°
82°
12
100°
83°
13
101°
85°
14
100°
82°
15
100°
80°
16
99°
79°
17
99°
81°
18
99°
81°
19
99°
79°
20
101°
77°
21
99°
80°
22
98°
81°
23
97°
80°
24
98°
80°
25
97°
79°
26
97°
80°
27
98°
79°
28
98°
77°
29
96°
80°
30
98°
85°
1
97°
82°
2
95°
79°
3
93°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Olmito
Olmito's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Olmito. See also: October | November | December.