Union County climate

Union County Weather in September

NOAA 1991-2020 normals for Anna 2 Nne, 2.2 km from Union County

Average highs run from 88°F on September 1 to 79°F on September 30, and lows from 64°F to 54°F. Normal precipitation for the month is 3.49 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 Union County, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
84°F
Average low
59°F
Precipitation
3.49 in
Record high
103°FSep 5, 2026
Record low
33°FSep 30, 2022
Chance of a freeze
0%
Days of 90°F or more
4.5
Daylight
12 h 59 min to 11 h 50 min
Cloud cover
46%
Humidity
68%
Dew point
58°F
Wind
6.0 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 188°F64°F98°F 202650°F 200723%0%
Sep 287°F64°F99°F 202649°F 200923%0%
Sep 387°F64°F100°F 202653°F 202423%0%
Sep 487°F63°F100°F 202650°F 201023%0%
Sep 587°F63°F103°F 202647°F 201023%0%
Sep 686°F63°F96°F 199844°F 201723%0%
Sep 786°F62°F94°F 199842°F 201723%0%
Sep 886°F62°F95°F 200240°F 202523%0%
Sep 986°F62°F96°F 200241°F 202423%0%
Sep 1085°F61°F96°F 200244°F 199823%0%
Sep 1185°F61°F95°F 201344°F 201723%0%
Sep 1285°F61°F93°F 201946°F 202223%0%
Sep 1384°F60°F95°F 201144°F 201423%0%
Sep 1484°F60°F98°F 202540°F 199923%0%
Sep 1584°F60°F97°F 202644°F 199923%0%
Sep 1684°F59°F97°F 202640°F 200023%0%
Sep 1783°F59°F98°F 202641°F 199923%0%
Sep 1883°F58°F95°F 202541°F 199923%0%
Sep 1983°F58°F95°F 202242°F 201223%0%
Sep 2082°F58°F98°F 202240°F 200624%0%
Sep 2182°F57°F99°F 202244°F 200024%0%
Sep 2282°F57°F92°F 200538°F 199924%0%
Sep 2381°F57°F94°F 200737°F 201224%0%
Sep 2481°F56°F92°F 201736°F 201224%0%
Sep 2581°F56°F90°F 199838°F 200124%0%
Sep 2680°F55°F89°F 199836°F 200124%0%
Sep 2780°F55°F93°F 199839°F 200024%0%
Sep 2880°F55°F92°F 199937°F 202224%0%
Sep 2979°F54°F93°F 201935°F 202224%0%
Sep 3079°F54°F94°F 201933°F 202224%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Union County, 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 6:27 AM, sunset 7:26 PM
September 30
sunrise 6:52 AM, sunset 6:42 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00110187 (Anna 2 Nne), public domain. Records: NOAA GHCN-Daily, station USW00093810, 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.