Union climate

Union Weather in October

NOAA 1991-2020 normals for Marengo, 6.4 km from Union

Average highs run from 70°F on October 1 to 55°F on October 31, and lows from 45°F to 35°F. Normal precipitation for the month is 2.98 in over about 8 wet days.

October 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.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

October at a glance

Average high
62°F
Average low
40°F
Precipitation
2.98 in
Record high
89°FOct 2, 1976
Record low
13°FOct 30, 1988
Chance of a freeze
95%
Daylight
11 h 44 min to 10 h 23 min
Cloud cover
62%
Humidity
76%
Dew point
42°F
Wind
10.5 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
Oct 170°F45°F88°F 197132°F 198424%0%
Oct 269°F45°F89°F 197625°F 197424%0%
Oct 369°F44°F88°F 197628°F 197425%0%
Oct 468°F44°F89°F 202527°F 198925%0%
Oct 568°F44°F89°F 200526°F 198925%0%
Oct 667°F43°F88°F 199726°F 198825%0%
Oct 767°F43°F87°F 200726°F 198825%0%
Oct 866°F42°F89°F 200722°F 198725%0%
Oct 966°F42°F86°F 200723°F 198725%0%
Oct 1065°F42°F88°F 201028°F 199325%0%
Oct 1165°F41°F84°F 201026°F 198725%0%
Oct 1264°F41°F83°F 202422°F 198825%0%
Oct 1364°F41°F86°F 197521°F 198825%0%
Oct 1464°F40°F85°F 197521°F 198825%0%
Oct 1563°F40°F82°F 198928°F 200625%
Oct 1663°F40°F82°F 199927°F 197025%
Oct 1762°F40°F78°F 199825°F 199225%
Oct 1862°F39°F82°F 201621°F 197625%
Oct 1961°F39°F76°F 200518°F 199225%
Oct 2061°F39°F79°F 197118°F 199225%
Oct 2160°F38°F82°F 197924°F 201826%
Oct 2260°F38°F82°F 197921°F 197626%
Oct 2359°F38°F78°F 197522°F 196926%
Oct 2459°F37°F79°F 197318°F 198126%
Oct 2558°F37°F79°F 202322°F 198726%
Oct 2658°F37°F77°F 198921°F 197926%
Oct 2757°F36°F76°F 200025°F 198826%
Oct 2857°F36°F76°F 201419°F 197626%
Oct 2956°F36°F80°F 199923°F 198026%
Oct 3056°F35°F81°F 202413°F 198826%
Oct 3155°F35°F77°F 202417°F 198826%

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 (CDT).

October 1
sunrise 6:51 AM, sunset 6:35 PM
October 31
sunrise 7:26 AM, sunset 5:49 PM

Every day of October: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00115326 (Marengo), public domain. Records: NOAA GHCN-Daily, station USC00112223, 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.