Cross Mountain climate

Cross Mountain Weather in September

NOAA 1991-2020 normals for Boerne, 18.5 km from Cross Mountain

Average highs run from 92°F on September 1 to 85°F on September 30, and lows from 69°F to 61°F. Normal precipitation for the month is 3.90 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 Cross Mountain, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
89°F
Average low
65°F
Precipitation
3.90 in
Record high
109°FSep 6, 2000
Record low
35°FSep 30, 1908
Chance of a freeze
0%
Days of 90°F or more
15.0
Daylight
12 h 45 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 192°F69°F102°F 195155°F 191521%0%
Sep 292°F69°F102°F 200055°F 191522%0%
Sep 391°F68°F103°F 200056°F 195522%0%
Sep 491°F68°F104°F 200054°F 197422%0%
Sep 591°F68°F108°F 200049°F 197422%0%
Sep 691°F68°F109°F 200047°F 197423%0%
Sep 791°F67°F102°F 202347°F 197423%0%
Sep 890°F67°F103°F 202347°F 191823%0%
Sep 990°F67°F106°F 202349°F 191823%0%
Sep 1090°F67°F102°F 191250°F 191823%0%
Sep 1190°F67°F101°F 202351°F 196823%0%
Sep 1289°F66°F102°F 202646°F 196823%0%
Sep 1389°F66°F106°F 191247°F 194023%0%
Sep 1489°F66°F101°F 193046°F 191323%0%
Sep 1589°F65°F101°F 191150°F 194523%0%
Sep 1688°F65°F100°F 191150°F 194523%0%
Sep 1788°F65°F100°F 191148°F 197923%0%
Sep 1888°F65°F100°F 191145°F 195123%0%
Sep 1988°F64°F100°F 191143°F 198123%0%
Sep 2087°F64°F99°F 191139°F 191322%0%
Sep 2187°F64°F102°F 192642°F 191222%0%
Sep 2287°F63°F100°F 190937°F 198322%0%
Sep 2387°F63°F98°F 190837°F 198322%0%
Sep 2487°F63°F100°F 202341°F 199922%0%
Sep 2586°F63°F104°F 202342°F 198922%0%
Sep 2686°F62°F104°F 200540°F 197521%0%
Sep 2786°F62°F104°F 200537°F 190921%0%
Sep 2886°F62°F102°F 200539°F 194221%0%
Sep 2985°F61°F102°F 200538°F 190821%0%
Sep 3085°F61°F96°F 192635°F 190821%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Cross Mountain, 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 7:12 AM, sunset 7:57 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 USC00410902 (Boerne), public domain. Records: NOAA GHCN-Daily, station USC00410902, 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.