Irion County climate

Irion County Weather in September

NOAA 1991-2020 normals for Mertzon 12NNW, 17.7 km from Irion County

Average highs run from 91°F on September 1 to 85°F on September 30, and lows from 66°F to 57°F. Normal precipitation for the month is 2.59 in.

September day by day

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

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

September at a glance

Average high
87°F
Average low
62°F
Precipitation
2.59 in
Record high
106°FSep 6, 2023
Record low
41°FSep 29, 2020
Chance of a freeze
0%
Days of 90°F or more
13.5
Daylight
12 h 47 min to 11 h 53 min
Cloud cover
43%
Humidity
57%
Dew point
57°F
Wind
10.1 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 191°F66°F103°F 202057°F 20170%
Sep 291°F66°F103°F 202060°F 20030%
Sep 390°F66°F101°F 202660°F 20030%
Sep 490°F65°F104°F 202652°F 20100%
Sep 590°F65°F104°F 202352°F 20100%
Sep 689°F65°F106°F 202349°F 20110%
Sep 789°F65°F102°F 201247°F 20110%
Sep 889°F64°F104°F 201247°F 20040%
Sep 989°F64°F105°F 202345°F 20040%
Sep 1088°F64°F103°F 202345°F 20040%
Sep 1188°F63°F102°F 201448°F 20200%
Sep 1288°F63°F103°F 202654°F 20170%
Sep 1388°F63°F103°F 202653°F 20140%
Sep 1488°F63°F103°F 201152°F 20140%
Sep 1587°F62°F104°F 201759°F 20080%
Sep 1687°F62°F101°F 202646°F 20080%
Sep 1787°F62°F98°F 202645°F 20080%
Sep 1887°F61°F98°F 202145°F 20080%
Sep 1987°F61°F97°F 201551°F 20080%
Sep 2086°F61°F100°F 201952°F 20080%
Sep 2186°F60°F103°F 202152°F 20200%
Sep 2286°F60°F99°F 201749°F 20210%
Sep 2386°F60°F101°F 202543°F 20210%
Sep 2486°F60°F102°F 202345°F 20210%
Sep 2586°F59°F101°F 202347°F 20090%
Sep 2685°F59°F105°F 200548°F 20090%
Sep 2785°F59°F102°F 200547°F 20100%
Sep 2885°F58°F101°F 201151°F 20080%
Sep 2985°F58°F103°F 200541°F 20200%
Sep 3085°F57°F98°F 201144°F 20200%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Irion County, in percent, and of at least 0.1 inch of snowfall.00.21102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

September 1
sunrise 7:20 AM, sunset 8:07 PM
September 30
sunrise 7:37 AM, sunset 7:30 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00415861 (Mertzon 12NNW), public domain. Records: NOAA GHCN-Daily, station USC00417944, 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.