Bexar County climate

Bexar County Weather in September

NOAA 1991-2020 normals for San Antonio Incarnate Word, 5.1 km from Bexar County

Average highs run from 93°F on September 1 to 86°F on September 30, and lows from 72°F to 65°F. Normal precipitation for the month is 3.90 in over about 8 wet days.

September day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Bexar County, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
90°F
Average low
69°F
Precipitation
3.90 in
Record high
112°FSep 5, 2000
Record low
47°FSep 30, 2020
Chance of a freeze
0%
Days of 90°F or more
17.2
Daylight
12 h 44 min to 11 h 54 min
Cloud cover
48%
Humidity
67%
Dew point
65°F
Wind
8.1 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Sep 193°F72°F105°F 200070°F 201721%0%
Sep 293°F72°F104°F 200068°F 200422%0%
Sep 393°F72°F106°F 200066°F 200422%0%
Sep 492°F72°F109°F 200070°F 200822%0%
Sep 592°F71°F112°F 200067°F 200623%0%
Sep 692°F71°F103°F 202164°F 201723%0%
Sep 792°F71°F104°F 202360°F 200623%0%
Sep 891°F71°F106°F 202361°F 201723%0%
Sep 991°F71°F103°F 202361°F 201124%0%
Sep 1091°F70°F103°F 202358°F 202024%0%
Sep 1191°F70°F104°F 202663°F 202024%0%
Sep 1290°F70°F103°F 202660°F 201724%0%
Sep 1390°F70°F103°F 200862°F 201725%0%
Sep 1490°F69°F103°F 202663°F 201525%0%
Sep 1590°F69°F103°F 202667°F 200325%0%
Sep 1689°F69°F101°F 201960°F 200825%0%
Sep 1789°F69°F101°F 202158°F 200025%0%
Sep 1889°F68°F104°F 201957°F 200025%0%
Sep 1989°F68°F104°F 201961°F 200625%0%
Sep 2088°F68°F104°F 202154°F 200825%0%
Sep 2188°F68°F102°F 202159°F 200226%0%
Sep 2288°F67°F100°F 200060°F 199926%0%
Sep 2388°F67°F101°F 200051°F 199926%0%
Sep 2487°F67°F103°F 202357°F 199926%0%
Sep 2587°F66°F105°F 201157°F 200026%0%
Sep 2687°F66°F103°F 201151°F 200026%0%
Sep 2787°F66°F101°F 200551°F 200026%0%
Sep 2887°F65°F103°F 200554°F 200026%0%
Sep 2986°F65°F101°F 201948°F 202026%0%
Sep 3086°F65°F99°F 201947°F 202026%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Bexar County, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 7:12 AM, sunset 7:56 PM
September 30
sunrise 7:27 AM, sunset 7:21 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417947 (San Antonio Incarnate Word), public domain. Records: NOAA GHCN-Daily, station USW00012970, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.