Union County climate

Union County Weather in January

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

Average highs run from 46°F on January 1 to 48°F on January 31, and lows from 20°F to 20°F. Normal precipitation for the month is 0.38 in over about 2 wet days.

January 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.-250255075100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

January at a glance

Average high
47°F
Average low
20°F
Precipitation
0.38 in
Snowfall
3.2 in
Record high
80°FJan 10, 1990
Record low
-21°FJan 4, 1959
Chance of a freeze
100%
Daylight
9 h 43 min to 10 h 23 min
Cloud cover
50%
Humidity
54%
Dew point
17°F
Wind
11.9 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
Jan 146°F20°F72°F 2026-12°F 19198%5%
Jan 246°F20°F79°F 1997-6°F 19798%5%
Jan 346°F20°F69°F 1898-19°F 19598%5%
Jan 446°F20°F78°F 1927-21°F 19598%5%
Jan 546°F20°F78°F 1956-9°F 19718%5%
Jan 646°F20°F75°F 1927-8°F 19718%5%
Jan 746°F20°F75°F 2006-11°F 19378%5%
Jan 846°F20°F76°F 1948-8°F 19378%5%
Jan 947°F20°F75°F 1916-8°F 19628%6%
Jan 1047°F20°F80°F 1990-12°F 19628%6%
Jan 1147°F20°F72°F 1928-16°F 19638%6%
Jan 1247°F20°F74°F 1953-17°F 19638%6%
Jan 1347°F20°F75°F 1928-16°F 19638%6%
Jan 1447°F20°F75°F 1928-5°F 20248%6%
Jan 1547°F20°F77°F 1999-4°F 19308%6%
Jan 1647°F20°F72°F 1974-9°F 19308%6%
Jan 1747°F20°F74°F 1923-12°F 19308%6%
Jan 1847°F20°F75°F 1920-13°F 19848%6%
Jan 1947°F20°F79°F 2018-15°F 19438%6%
Jan 2047°F20°F75°F 1986-8°F 20258%6%
Jan 2147°F20°F75°F 1950-8°F 19668%6%
Jan 2248°F20°F70°F 1943-3°F 19628%6%
Jan 2348°F20°F72°F 2013-3°F 19638%6%
Jan 2448°F20°F77°F 1970-3°F 20268%6%
Jan 2548°F20°F74°F 1935-4°F 19298%6%
Jan 2648°F20°F77°F 1951-3°F 19638%6%
Jan 2748°F20°F73°F 1970-10°F 19488%6%
Jan 2848°F20°F75°F 1986-10°F 19488%6%
Jan 2948°F20°F72°F 1971-6°F 19519%6%
Jan 3048°F20°F78°F 2018-2°F 19499%6%
Jan 3148°F20°F79°F 1989-12°F 19519%6%

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.02468101102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MST).

January 1
sunrise 7:06 AM, sunset 4:49 PM
January 31
sunrise 6:56 AM, sunset 5:19 PM

Every day of January: 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.