Best year time to visit Union County

General weather information about Union County

Average annual temperature is 17.8 °C

Absolute maximum temperature: 38.5 °C

Absolute minimum temperature: -5.8 °C

Number of sunny days: 175 days

Number of rainy days: 190 days

Look at detailed online map of Union County

* Weather data for Union County United States is based on climate observations for 2026 year

Union County air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)21.727.027.429.332.035.436.038.533.532.026.621.6
Average daytime temperature (°C)14.317.218.721.727.331.832.733.130.725.118.114.1
Average temperature (°C)9.511.112.815.621.025.026.927.124.219.012.18.6
Average night temperature (°C)5.56.98.210.715.719.622.422.518.914.07.54.5
Absolute minimum temperature (°C)-3.1-4.0-5.85.07.015.518.717.714.52.1-0.9-2.6

Union County monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.010.0
Daylight mean duration (h)10.110.912.013.114.014.414.213.412.411.310.49.9
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.010.09.0
Sunshine mean duration (h)5.66.07.97.910.912.111.110.210.88.57.27.1
Precipitation (mm)1461201601747011614611629145570
Sunny days149161310991417222220
Rainy days1719151721212217139811
Snow days000000000000

Union County - weather forecast by months

Union County weather in januaryUnion County weather in februaryUnion County weather in marchUnion County weather in aprilUnion County weather in mayUnion County weather in juneUnion County weather in julyUnion County weather in augustUnion County weather in septemberUnion County weather in octoberUnion County weather in novemberUnion County weather in december

Best time to visit Union County:

The best time to visit Union County during the most sunny months:

  • June — 12.1(h)
  • July — 11.1(h)

The largest precipitation sum in Union County is at

  • January — 146(mm)
  • March — 160(mm)
  • April — 174(mm)
  • July — 146(mm)

    • Weather forecast in the closest to Union County admin centers

    Weather forecast in the closest towns to Union County

    Explore Union County

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    MapTrains schedule
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    Frequently asked questions

    When is the best time to visit Union County?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Union County.
    What is the weather like in Union County?
    See average temperature, rainfall and daylight hours for Union County by month in the table above.
    How many sunny days does Union County have?
    The monthly weather statistics above show sunshine and rainfall patterns for Union County throughout the year.