Houston climate

Houston Weather in September

NOAA 1991-2020 normals for Houston, 1 km from Houston

Average highs run from 83°F on September 1 to 74°F on September 30, and lows from 62°F to 51°F. Normal precipitation for the month is 4.17 in over about 7 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 Houston, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
79°F
Average low
57°F
Precipitation
4.17 in
Record high
104°FSep 6, 2026
Record low
37°FSep 23, 2012
Chance of a freeze
4%
Days of 90°F or more
2.7
Daylight
12 h 58 min to 11 h 49 min
Cloud cover
46%
Humidity
69%
Dew point
56°F
Wind
3.8 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 183°F62°F102°F 202647°F 200922%0%
Sep 283°F62°F101°F 202647°F 200922%0%
Sep 383°F62°F101°F 202647°F 200921%0%
Sep 483°F61°F102°F 202647°F 200921%0%
Sep 582°F61°F101°F 202648°F 201021%0%
Sep 682°F61°F104°F 202646°F 201721%0%
Sep 782°F60°F98°F 202644°F 201721%0%
Sep 882°F60°F96°F 202640°F 202421%0%
Sep 981°F60°F101°F 202641°F 202421%0%
Sep 1081°F59°F100°F 202643°F 202421%0%
Sep 1181°F59°F89°F 201544°F 202421%0%
Sep 1280°F58°F94°F 202549°F 201521%0%
Sep 1380°F58°F97°F 202541°F 201521%0%
Sep 1480°F58°F97°F 202540°F 201421%0%
Sep 1579°F57°F97°F 202641°F 201421%0%
Sep 1679°F57°F101°F 202644°F 200721%0%
Sep 1779°F56°F101°F 202646°F 200821%0%
Sep 1878°F56°F97°F 202648°F 202322%0%
Sep 1978°F56°F93°F 201840°F 201222%0%
Sep 2078°F55°F95°F 202240°F 201222%0%
Sep 2177°F55°F96°F 202246°F 201122%0%
Sep 2277°F54°F95°F 201748°F 201522%0%
Sep 2377°F54°F94°F 201737°F 201222%0%
Sep 2476°F53°F94°F 201737°F 201222%0%
Sep 2576°F53°F94°F 201741°F 201222%0%
Sep 2676°F53°F90°F 201745°F 201122%0%
Sep 2775°F52°F89°F 201743°F 202222%0%
Sep 2875°F52°F90°F 201945°F 202222%0%
Sep 2975°F51°F90°F 202342°F 202022%0%
Sep 3074°F51°F92°F 202339°F 200922%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Houston, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 6:38 AM, sunset 7:36 PM
September 30
sunrise 7:03 AM, sunset 6:52 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00234019 (Houston), public domain. Records: NOAA GHCN-Daily, station USC00232981, 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.