Places › San Antonio, TX › September
San Antonio in September
A good month — score 66 of 100
Typical September days in San Antonio reach about 90°F with nights near 70°F.
Avg high
90°F
1991–2020 normal
Avg low
70°F
1991–2020 normal
Rain total
3.88 in
in a typical September
Rain days
7
days with at least 0.01 in
Daylight
12h 18m
at mid-September, computed
What to pack for San Antonio in September
- Layers — afternoons run about 20° warmer than mornings.
- A compact rain layer — about 7 days see rain in a typical September.
- Breathable clothes, a hat, and sunscreen — typical afternoons reach about 90°F.
- Pace the midday hours — about 20 days in a typical September reach 90°F.
Every packing line is triggered by a number on this page — the rules are on How we pick.
September vs. the alternatives
The whole year in San Antonio
JAN
63°F
Rain 7 days
Daylight 10h 27mFEB
68°F
★ Best
Rain 7 days
Daylight 11h 06mMAR
74°F
Rain 8 days
Daylight 11h 54mAPR
80°F
Rain 6 days
Daylight 12h 50mMAY
87°F
Rain 8 days
Daylight 13h 36mJUN
92°F
Rain 7 days
Daylight 14h 01mJUL
95°F
Rain 5 days
Daylight 13h 51mAUG
96°F
Rain 5 days
Daylight 13h 12mSEP
90°F
Rain 7 days
Daylight 12h 18mOCT
82°F
Rain 6 days
Daylight 11h 24mNOV
72°F
★ Best
Rain 6 days
Daylight 10h 38mDEC
65°F
Rain 7 days
Daylight 10h 16m
63°F
Rain 7 days
Daylight 10h 27mFEB
68°F
★ Best
Rain 7 days
Daylight 11h 06mMAR
74°F
Rain 8 days
Daylight 11h 54mAPR
80°F
Rain 6 days
Daylight 12h 50mMAY
87°F
Rain 8 days
Daylight 13h 36mJUN
92°F
Rain 7 days
Daylight 14h 01mJUL
95°F
Rain 5 days
Daylight 13h 51mAUG
96°F
Rain 5 days
Daylight 13h 12mSEP
90°F
Rain 7 days
Daylight 12h 18mOCT
82°F
Rain 6 days
Daylight 11h 24mNOV
72°F
★ Best
Rain 6 days
Daylight 10h 38mDEC
65°F
Rain 7 days
Daylight 10h 16m
Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.