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

Greenville Spartanburg International Airport (KGSP)

Lat: 34.91°NLon: 82.21°WElev: 955ft.

Fair

52°F

11°C

Humidity 93%
Wind Speed Calm
Barometer 30.03 in (1016.2 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 26 Dec 4:53 am EST
Extended Forecast for

4 Miles NE Simpsonville SC

  • Today

    Today: Increasing clouds, with a high near 65. Light and variable wind becoming south southeast 5 to 7 mph in the morning.

    High: 65 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Patchy fog between midnight and 1am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 52. West wind 5 to 7 mph.

    Low: 52 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Sunny, with a high near 76. Light and variable wind.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52. Calm wind becoming northeast around 5 mph after midnight.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of rain between 10am and noon. Cloudy, with a high near 62. East northeast wind around 6 mph becoming south southeast in the afternoon. Chance of precipitation is 20%.

    High: 62 °F

    Slight Chance
    Rain then
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Monday

    Monday: A 40 percent chance of rain before 1pm. Partly sunny, with a high near 68.

    High: 68 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 65. Light and variable wind becoming south southeast 5 to 7 mph in the morning.
Tonight
Patchy fog between midnight and 1am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 52. West wind 5 to 7 mph.
Saturday
Sunny, with a high near 76. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 52. Calm wind becoming northeast around 5 mph after midnight.
Sunday
A slight chance of rain between 10am and noon. Cloudy, with a high near 62. East northeast wind around 6 mph becoming south southeast in the afternoon. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 56.
Monday
A 40 percent chance of rain before 1pm. Partly sunny, with a high near 68.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Sunny, with a high near 48.
Tuesday Night
Clear, with a low around 26.
Wednesday
Sunny, with a high near 52.
Wednesday Night
Mostly clear, with a low around 29.
New Year's Day
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Simpsonville SC
 34.78°N 82.22°W (Elev. 830 ft)
Last Update:
12:18 am EST Dec 26, 2025
Forecast Valid:
5am 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