National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

Union County Airport - Troy Shelton Field (K35A)

Lat: 34.69°NLon: 81.64°WElev: 610ft.

Mostly Cloudy

52°F

11°C

Humidity NA
Wind Speed Calm
Barometer 30.07 in
Dewpoint N/A
Visibility 0.50 mi
Last update 26 Dec 3:55 am EST
Extended Forecast for

Union SC

  • Today

    Today: Mostly cloudy, with a high near 63. Calm wind becoming east around 6 mph.

    High: 63 °F

    Mostly Cloudy

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 53. Calm wind becoming southwest around 5 mph after midnight.

    Low: 53 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 74. Light west wind.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 50. Calm wind.

    Low: 50 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy, with a high near 62. Light and variable wind.

    High: 62 °F

    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of rain between 8am and 1pm. Partly sunny, with a high near 69. Chance of precipitation is 40%.

    High: 69 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 63. Calm wind becoming east around 6 mph.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 53. Calm wind becoming southwest around 5 mph after midnight.
Saturday
Sunny, with a high near 74. Light west wind.
Saturday Night
Increasing clouds, with a low around 50. Calm wind.
Sunday
Cloudy, with a high near 62. Light and variable wind.
Sunday Night
Mostly cloudy, with a low around 55.
Monday
A chance of rain between 8am and 1pm. Partly sunny, with a high near 69. Chance of precipitation is 40%.
Monday Night
Mostly clear, with a low around 30.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Clear, with a low around 26.
Wednesday
Sunny, with a high near 51.
Wednesday Night
Mostly clear, with a low around 29.
New Year's Day
Mostly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Union SC
 34.71°N 81.62°W (Elev. 600 ft)
Last Update:
12:18 am EST Dec 26, 2025
Forecast Valid:
4am EST Dec 26, 2025-6pm EST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation