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Keystone, SD
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7-Day Forecast
Today
Patchy Fog then Slight Chance Showers
High: 43°
A 20% chance of showers after 4pm.
Patchy fog before 10am.
Otherwise, mostly cloudy with a high near 43.
Light south wind increasing
to 5 to 9 mph in the morning.
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Tonight
Rain/Snow Likely then Slight Chance Rain/Snow
Low: 33°
Rain likely, possibly mixed with snow showers before 4am,
then a slight chance of rain showers.
Cloudy with a low around 33.
South wind 3 to 8 mph.
Chance of precipitation is 60%.
Little or no snow accumulation expected.
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Tuesday
Chance Showers then Rain/Snow
High: 43°
A chance of rain showers before noon,
then rain
between noon and 2pm,
then rain and snow after 2pm.
High near 43.
Light and variable wind becoming
north 5 to 8 mph in the morning.
Chance of precipitation is 80%.
Little or no snow accumulation expected.
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Tuesday Night
Rain/Snow Likely then Snow Likely
Low: 27°
Rain and snow likely, becoming all snow after 9pm.
Mostly cloudy with a low around 27.
Wind chill values as low as 20.
North wind 7 to 10 mph
with gusts as high as 22 mph.
Chance of precipitation is 70%.
New snow accumulation of 1 to 3 inches possible.
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Wednesday
Snow Likely
High: 37°
Snow likely.
Mostly cloudy with a high near 37.
Northwest wind 9 to 14 mph
with gusts as high as 30 mph.
Chance of precipitation is 70%.
New snow accumulation of less than a half inch possible.
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Wednesday Night
Slight Chance Snow then Mostly Cloudy
Low: 26°
A 20% chance of snow before midnight.
Mostly cloudy with a low around 26.
North wind 5 to 9 mph becoming calm in the evening.
Winds could gust as high as 23 mph.
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Thursday
Partly Sunny then Chance Snow
High: 41°
A 30% chance of snow after noon.
Partly sunny with a high near 41.
Calm wind becoming
southeast around 6 mph in the afternoon.
Winds could gust as high as 15 mph.
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Thursday Night
Chance Snow
Low: 27°
A chance of snow, mainly before midnight.
Mostly cloudy with a low around 27.
Southeast wind around 5 mph becoming calm in the evening.
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Friday
Chance Snow
High: 42°
A chance of snow.
Partly sunny with a high near 42.
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Friday Night
Chance Snow
Low: 24°
A chance of snow.
Mostly cloudy with a low around 24.
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Saturday
Chance Snow
High: 43°
A chance of snow.
Mostly sunny with a high near 43.
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Saturday Night
Mostly Clear
Low: 25°
Mostly clear with a low around 25.
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Sunday
Sunny
High: 48°
Sunny with a high near 48.
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Source: National Weather Service
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