Jonestown climate

Jonestown Weather in September

NOAA 1991-2020 normals for Austin Great Hills, 17.5 km from Jonestown

Average highs run from 93°F on September 1 to 86°F on September 30, and lows from 70°F to 62°F. Normal precipitation for the month is 3.42 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 Jonestown, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
89°F
Average low
67°F
Precipitation
3.42 in
Record high
106°FSep 8, 2023
Record low
52°FSep 27, 2010
Chance of a freeze
0%
Days of 90°F or more
18.4
Daylight
12 h 46 min to 11 h 53 min
Cloud cover
46%
Humidity
65%
Dew point
63°F
Wind
8.3 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°F70°F100°F 202369°F 200920%0%
Sep 293°F70°F101°F 202368°F 201520%0%
Sep 393°F70°F102°F 202667°F 201020%0%
Sep 492°F70°F101°F 202364°F 200821%0%
Sep 592°F69°F102°F 202366°F 200821%0%
Sep 692°F69°F102°F 202362°F 201121%0%
Sep 792°F69°F104°F 202359°F 201721%0%
Sep 891°F69°F106°F 202360°F 201721%0%
Sep 991°F68°F102°F 202354°F 202021%0%
Sep 1091°F68°F98°F 202654°F 202021%0%
Sep 1191°F68°F99°F 201158°F 202021%0%
Sep 1290°F68°F101°F 201161°F 201421%0%
Sep 1390°F67°F101°F 201156°F 201421%0%
Sep 1490°F67°F98°F 201161°F 201421%0%
Sep 1589°F67°F98°F 202661°F 201221%0%
Sep 1689°F67°F97°F 201957°F 200821%0%
Sep 1789°F66°F96°F 202158°F 200821%0%
Sep 1889°F66°F97°F 201960°F 200821%0%
Sep 1989°F66°F97°F 202159°F 200821%0%
Sep 2088°F65°F99°F 202157°F 202021%0%
Sep 2188°F65°F95°F 202462°F 201321%0%
Sep 2288°F65°F96°F 202259°F 200921%0%
Sep 2388°F65°F98°F 202355°F 200921%0%
Sep 2487°F64°F102°F 202354°F 200921%0%
Sep 2587°F64°F101°F 201155°F 200921%0%
Sep 2687°F64°F101°F 201158°F 201021%0%
Sep 2787°F63°F96°F 201152°F 201021%0%
Sep 2886°F63°F95°F 201156°F 201021%0%
Sep 2986°F63°F98°F 201156°F 200921%0%
Sep 3086°F62°F96°F 202457°F 201621%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Jonestown, 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 7:08 AM, sunset 7:54 PM
September 30
sunrise 7:25 AM, sunset 7:18 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00410433 (Austin Great Hills), public domain. Records: NOAA GHCN-Daily, station USW00023907, 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.