Union climate

Union Weather in September

NOAA 1991-2020 normals for Union 8 S, 12.7 km from Union

Average highs run from 87°F on September 1 to 79°F on September 30, and lows from 66°F to 55°F. Normal precipitation for the month is 3.37 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, in °F, with the record for each date.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

September at a glance

Average high
83°F
Average low
61°F
Precipitation
3.37 in
Record high
102°FSep 7, 1954
Record low
35°FSep 30, 1967
Chance of a freeze
0%
Days of 90°F or more
6.6
Daylight
12 h 53 min to 11 h 51 min
Cloud cover
50%
Humidity
72%
Dew point
62°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 187°F66°F100°F 195749°F 197626%0%
Sep 287°F65°F99°F 195746°F 196726%0%
Sep 386°F65°F100°F 195743°F 196725%0%
Sep 486°F65°F99°F 195143°F 196725%0%
Sep 586°F65°F100°F 195443°F 199725%0%
Sep 686°F64°F99°F 195443°F 199725%0%
Sep 786°F64°F102°F 195446°F 199724%0%
Sep 885°F64°F98°F 195446°F 198424%0%
Sep 985°F64°F97°F 195446°F 196524%0%
Sep 1085°F63°F98°F 200741°F 195624%0%
Sep 1185°F63°F97°F 200743°F 195624%0%
Sep 1284°F63°F97°F 200744°F 197624%0%
Sep 1384°F62°F98°F 201943°F 196724%0%
Sep 1484°F62°F95°F 196240°F 198524%0%
Sep 1584°F62°F97°F 198040°F 196724%0%
Sep 1683°F61°F97°F 198040°F 196724%0%
Sep 1783°F61°F96°F 195643°F 196124%0%
Sep 1883°F61°F94°F 195343°F 198524%0%
Sep 1982°F60°F96°F 195444°F 198124%0%
Sep 2082°F60°F99°F 195441°F 198124%0%
Sep 2182°F59°F98°F 195443°F 198124%0%
Sep 2282°F59°F96°F 195441°F 198324%0%
Sep 2381°F59°F98°F 202237°F 198324%0%
Sep 2481°F58°F96°F 201037°F 198324%0%
Sep 2581°F58°F94°F 196138°F 194924%0%
Sep 2680°F57°F96°F 201037°F 195024%0%
Sep 2780°F57°F96°F 201940°F 195024%0%
Sep 2880°F56°F95°F 201939°F 198524%0%
Sep 2979°F56°F94°F 195439°F 196724%0%
Sep 3079°F55°F96°F 201935°F 196724%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Union, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

September 1
sunrise 7:00 AM, sunset 7:53 PM
September 30
sunrise 7:21 AM, sunset 7:12 PM

Every day of September: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00388786 (Union 8 S), public domain. Records: NOAA GHCN-Daily, station USC00388786, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.