Union County climate

Union County Weather in October

NOAA 1991-2020 normals for Grenville, 18.2 km from Union County

Average highs run from 73°F on October 1 to 62°F on October 31, and lows from 44°F to 33°F. Normal precipitation for the month is 0.99 in over about 3 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 County, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

October at a glance

Average high
68°F
Average low
38°F
Precipitation
0.99 in
Snowfall
0.7 in
Record high
93°FOct 3, 2000
Record low
6°FOct 30, 2019
Chance of a freeze
100%
Daylight
11 h 48 min to 10 h 42 min
Cloud cover
40%
Humidity
49%
Dew point
31°F
Wind
11.4 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 173°F44°F90°F 200032°F 196112%0%
Oct 273°F44°F91°F 200633°F 197112%0%
Oct 372°F43°F93°F 200032°F 192411%0%
Oct 472°F43°F91°F 192230°F 193211%0%
Oct 572°F42°F91°F 202431°F 192411%0%
Oct 671°F42°F89°F 192829°F 194811%0%
Oct 771°F42°F91°F 192825°F 197011%0%
Oct 870°F41°F90°F 197923°F 197010%0%
Oct 970°F41°F89°F 202025°F 197010%1%
Oct 1070°F40°F87°F 196223°F 201910%1%
Oct 1169°F40°F89°F 196217°F 201910%1%
Oct 1269°F40°F89°F 202419°F 196910%1%
Oct 1369°F39°F89°F 195017°F 196910%1%
Oct 1468°F39°F89°F 202024°F 201810%1%
Oct 1568°F38°F90°F 201624°F 195210%1%
Oct 1668°F38°F91°F 201618°F 189910%1%
Oct 1767°F38°F93°F 192616°F 189910%1%
Oct 1867°F37°F87°F 200923°F 191710%1%
Oct 1967°F37°F87°F 200320°F 191610%1%
Oct 2066°F37°F89°F 200720°F 191610%1%
Oct 2166°F36°F89°F 192124°F 199610%1%
Oct 2266°F36°F88°F 201622°F 199610%1%
Oct 2365°F36°F89°F 200322°F 191710%2%
Oct 2465°F35°F84°F 201420°F 192910%2%
Oct 2564°F35°F89°F 195918°F 202010%2%
Oct 2664°F35°F87°F 197912°F 202010%2%
Oct 2764°F34°F87°F 192614°F 202010%2%
Oct 2863°F34°F84°F 201613°F 192510%2%
Oct 2963°F34°F91°F 20037°F 191710%2%
Oct 3063°F33°F84°F 19506°F 201910%2%
Oct 3162°F33°F83°F 20168°F 201910%2%

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.02.557.51012.51102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

October 1
sunrise 6:49 AM, sunset 6:37 PM
October 31
sunrise 7:16 AM, sunset 5:58 PM

Every day of October: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00293706 (Grenville), public domain. Records: NOAA GHCN-Daily, station USW00023051, 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.