Forecast Details for Spearfish, SD

Recent Locations: Eldena, IL Lacombe, LA Spearfish, SD

Today: A 20 percent chance of rain before noon. Partly sunny, with a high near 46. Northwest wind 10 to 18 mph, with gusts as high as 30 mph.

Tonight: Mostly clear, with a low around 35. West wind 9 to 15 mph, with gusts as high as 24 mph.

Sunday: Mostly sunny, with a high near 53. West wind 8 to 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

Sunday Night: A 20 percent chance of snow after midnight. Areas of fog after 9pm. Otherwise, mostly cloudy, with a low around 29. North wind 5 to 9 mph becoming light and variable in the evening. Winds could gust as high as 16 mph.

Monday: A slight chance of snow before 11am, then a slight chance of rain and snow between 11am and noon, then a slight chance of rain after noon. Areas of fog before noon. Otherwise, mostly cloudy, with a high near 42. Breezy, with an east wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 20%.

Monday Night: Mostly cloudy, with a low around 32. Breezy, with a southeast wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 32 mph.

Tuesday: Mostly sunny, with a high near 67. South wind 5 to 7 mph becoming west in the afternoon.

Tuesday Night: A slight chance of rain. Partly cloudy, with a low around 38. Southeast wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph.

Wednesday: A slight chance of rain before 7am, then a slight chance of rain and snow between 7am and noon, then a chance of rain after noon. Mostly sunny, with a high near 50. Breezy.

Wednesday Night: A chance of rain before 7pm, then a chance of rain and snow between 7pm and 10pm, then a chance of snow after 10pm. Mostly cloudy, with a low around 28.

Thursday: Rain and snow likely. Partly sunny, with a high near 47.

Thursday Night: Rain and snow likely. Mostly cloudy, with a low around 31.

Friday: A chance of rain and snow. Partly sunny, with a high near 52.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog