Union County climate

Union County Weather in October

NOAA 1991-2020 normals for Marysville, 14.7 km from Union County

Average highs run from 72°F on October 1 to 58°F on October 31, and lows from 49°F to 39°F. Normal precipitation for the month is 2.72 in over about 9 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
65°F
Average low
44°F
Precipitation
2.72 in
Record high
92°FOct 2, 2019
Record low
12°FOct 29, 1925
Chance of a freeze
70%
Daylight
11 h 46 min to 10 h 30 min
Cloud cover
60%
Humidity
73%
Dew point
43°F
Wind
10.3 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 172°F49°F91°F 201929°F 194729%0%
Oct 271°F49°F92°F 201929°F 194729%0%
Oct 371°F48°F92°F 195330°F 197429%0%
Oct 470°F48°F91°F 195129°F 193529%0%
Oct 570°F48°F92°F 195126°F 196530%0%
Oct 670°F47°F88°F 194626°F 192330%0%
Oct 769°F47°F90°F 200724°F 193530%0%
Oct 869°F47°F91°F 193926°F 195230%0%
Oct 968°F46°F90°F 194927°F 195130%0%
Oct 1068°F46°F86°F 201026°F 192530%0%
Oct 1167°F46°F85°F 195419°F 196430%
Oct 1267°F45°F86°F 193824°F 196430%
Oct 1366°F45°F84°F 193525°F 192230%
Oct 1466°F44°F83°F 198925°F 191730%
Oct 1566°F44°F85°F 195321°F 193930%
Oct 1665°F44°F82°F 193824°F 193730%
Oct 1765°F43°F84°F 193823°F 197730%
Oct 1864°F43°F85°F 193822°F 193930%
Oct 1964°F43°F87°F 195324°F 192230%
Oct 2063°F42°F87°F 195322°F 193030%
Oct 2163°F42°F85°F 195317°F 195230%
Oct 2262°F42°F83°F 192018°F 193030%
Oct 2362°F41°F84°F 194721°F 193030%
Oct 2461°F41°F81°F 192020°F 198130%
Oct 2561°F41°F81°F 196322°F 196030%
Oct 2661°F40°F83°F 196319°F 193030%
Oct 2760°F40°F79°F 194021°F 196230%
Oct 2860°F40°F80°F 192721°F 193630%
Oct 2959°F39°F80°F 192212°F 192530%
Oct 3059°F39°F80°F 192721°F 192830%
Oct 3158°F39°F84°F 195018°F 198830%

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.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

October 1
sunrise 7:30 AM, sunset 7:16 PM
October 31
sunrise 8:02 AM, sunset 6:32 PM

Every day of October: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00334979 (Marysville), public domain. Records: NOAA GHCN-Daily, station USC00334979, 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.