What is today's weather forecast for Foster, SD?

Today's forecast for Foster shows a high of 21 degrees and a low of 19 degrees Fahrenheit. Increasing clouds, with a high near 21.

What is the 7-day weather forecast for Foster, SD?

The 7-day forecast for Foster shows highs from 6 to 33 degrees and lows from -7 to 20 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in Foster, SD this week?

Yes, rain is possible in Foster this week. Precipitation chances: Friday (20% chance), Saturday (70% chance), Sunday (20% chance), Tuesday (30% chance), Wednesday (20% chance).

How accurate is the Foster weather forecast?

WeatherForYou provides highly accurate Foster forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Foster, SD Weather Forecast and Current Conditions

Current Conditions From Nearby Station

Switch to Metric Units

-3°F
Feels Like -3°F

Humidity 81% Dew Point -7°F Wind Calm Barometer 30.32 in.

Report from a MADIS/MESONET weather station 5 mi. SSE of central Foster
at 4:40 AM Thu, Dec 4, 2025

Point Forecast at a Glance

ThuDec 4

FriDec 5

20%

SatDec 6

70%

-7

SunDec 7

20%

MonDec 8

TueDec 9

WedDec 10

20%

7-Day Temperature Trend

Week Ahead Summary

High temperatures start near 21°F, reaching 33°F before cooling to 6°F, then recovering to 28°F by week's end. Unsettled weather expected with snow likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 5°F below the historical average for December. Normal highs for this period are around 29°F with lows around 11°F.

This Date in Weather History

1972 - Winds gusting to 70 mph sent the temperature at Livingston, MT, plunging from 52 degrees to 18 degrees in just twenty minutes.

Foster, SD 7 Day Weather Forecast Details

Thursday Dec 4

Day: Increasing clouds, with a high near 21. Wind chill values as low as -20. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

Night: Increasing clouds, with a low around 19. West southwest wind 5 to 15 mph, with gusts as high as 25 mph.

Friday Dec 5

Day: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 33. West wind 5 to 15 mph, with gusts as high as 20 mph.

Night: Mostly cloudy, with a low around 13. West northwest wind 5 to 10 mph becoming north northeast after midnight.

Saturday Dec 6

Day: Snow likely, mainly after noon. Cloudy, with a high near 21. East northeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of around 3 inches.

Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around -7. North northeast wind 5 to 15 mph.

Sunday Dec 7

Day: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 6.

Night: Mostly cloudy, with a low around 1.

Monday Dec 8

Day: Partly sunny, with a high near 29.

Night: Mostly cloudy, with a low around 19.

Tuesday Dec 9

Day: Mostly cloudy, with a high near 33.

Night: A 30 percent chance of snow. Mostly cloudy, with a low around 20.

Wednesday Dec 10

Day: A 20 percent chance of snow. Mostly cloudy, with a high near 28.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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