March weather forecast
Keystone, SD

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Weather in March

March in Keystone signals the advent of Spring, which begins to modify the weather conditions seen in the previous two months. The most notable difference in March is a leap in temperature, with highs reaching up to 43.9°F (6.6°C), establishing it as a transitional month. As the snow starts to diminish, rainfall becomes more frequent, making the city's weather more dynamic. The month is characterized by more daylight hours that favor outdoor activities. With the arrival of April, the weather in Keystone becomes even milder, paving the way towards the warm season.

Temperature

The onset of March in Keystone brings a rise in the average high-temperature, elevating from a freezing cold 31.5°F (-0.3°C) in February to a frosty 43.9°F (6.6°C). Throughout the nights in March, Keystone experiences an average low-temperature of 26.4°F (-3.1°C).

Humidity

In March, the average relative humidity is 70%.

Rainfall

In Keystone, in March, during 9.3 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Keystone, South Dakota, during the entire year, the rain falls for 135.4 days and collects up to 20.39" (518mm) of precipitation.

Snowfall

Months with snowfall in Keystone are January through May, September through December. In Keystone, in March, during 11.3 snowfall days, 6.97" (177mm) of snow is typically accumulated. Throughout the year, in Keystone, there are 75.1 snowfall days, and 40.24" (1022mm) of snow is accumulated.

Daylight

In March, the average length of the day in Keystone is 11h and 58min.
On the first day of the month, sunrise is at 6:28 am and sunset at 5:42 pm MST. On the last day of March, sunrise is at 6:35 am and sunset at 7:19 pm MDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from MDT to MST.

Sunshine

The average sunshine in March in Keystone is 7.9h.

UV index

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Keystone. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: In March, the maximum UV index of 2 suggests these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Frequently asked questions

How cold is it in Keystone in March?

During March, Keystone experiences an average high-temperature of 43.9°F (6.6°C) and a low-temperature of 26.4°F (-3.1°C).

What is the average humidity in March in Keystone?

In March, the average relative humidity in Keystone is 70%.

How many days does it rain in March in Keystone?

In Keystone, during March, the rain falls for 9.3 days and regularly aggregates up to 1.34" (34mm) of precipitation.

How many days does it snow in March in Keystone?

In Keystone, in March, snow falls for 11.3 days, with typically accumulated 6.97" (177mm) of snow.

How many hours of daylight does Keystone have in March?

In Keystone, the average day length in March is 11h and 58min.

When are sunrise and sunset in March in Keystone?

On the first day of March in Keystone, sunrise is at 6:28 am and sunset at 5:42 pm MST. On the last day of the month, sunrise is at 6:35 am and sunset at 7:19 pm MDT.

When does Daylight Saving Time (DST) start in March in Keystone?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Keystone, and the time zone changes from MST to MDT. DST ends Sunday, November 3. 2024, at 2:00 am.

How long on average sun shines in March in Keystone?

In March, the average sunshine duration is 7.9h.

When is the lowest UV index in Keystone?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Keystone, South Dakota.

How high is the UV index in March in Keystone?

The average daily maximum UV index in March is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in March
Keystone, SD

Average temperature in March - Keystone, SD
  • Average high temperature in March: 43.9°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (29.8°F).

  • Average low temperature in March: 26.4°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).

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Average pressure in March
Keystone, SD

Average pressure in March - Keystone, SD
  • Average pressure in March: 30"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed in March
Keystone, SD

Average wind speed in March - Keystone, SD
  • Average wind speed in March: 8.8mph

The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).

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Average humidity in March
Keystone, SD

Average humidity in March - Keystone, SD
  • Average humidity in March: 70%

The months with the highest relative humidity are January and February (77%).
The months with the lowest relative humidity are August and September (52%).

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Average rainfall in March
Keystone, SD

Average rainfall in March - Keystone, SD
  • Average rainfall in March: 1.34"

The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in March
Keystone, SD

Average rainfall days in March - Keystone, SD
  • Average rainfall days in March: 9.3 days

The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is November (4.5 days).

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Average snowfall in March
Keystone, SD

Average snowfall in March - Keystone, SD
  • Average snowfall in March: 6.97"

The month with the highest snowfall is April (7.24").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in March
Keystone, SD

Average snowfall days in March - Keystone, SD
  • Average snowfall days in March: 11.3 days

The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight in March /
Average sunshine in March
Keystone, SD

Average daylight in March / Average sunshine in March - Keystone, SD
  • Average daylight in March: 12h and 0min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in March: 7h and 5min

The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).

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Average sunshine days in March
Keystone, SD

Average sunshine days in March - Keystone, SD
  • Average sunshine days in March: 13.3 days

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (7.8 days).

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Average UV index in March
Keystone, SD

Average UV index in March - Keystone, SD
  • Average UV index in March: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in March
Keystone, SD

Average cloud cover in March - Keystone, SD
  • Average cloud cover in March: 36

The month with the most cloud cover is April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 17).

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Average visibility in March
Keystone, SD

Average visibility in March - Keystone, SD
  • Average visibility in March: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Keystone, South Dakota, USA

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