April weather forecast
Letcher, SD

Weather in April

April is a mild spring month in Letcher, South Dakota, with an average temperature ranging between max 56.8°F (13.8°C) and min 38.8°F (3.8°C).

Temperature

In Letcher, the average high-temperature in April increases from a chilly 44.4°F (6.9°C) in March to a mild 56.8°F (13.8°C). In April, the average low-temperature is 38.8°F (3.8°C).

Humidity

In Letcher, the average relative humidity in April is 67%.

Rainfall

In Letcher, it is raining for 11.3 days, with typically 1.18" (30mm) of accumulated precipitation. Throughout the year, there are 93.2 rainfall days, and 11.3" (287mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Letcher are January through April, October through December. April is the last month it regularly snows in Letcher. During 2.6 snowfall days, Letcher aggregates 0.98" (25mm) of snow. Throughout the year, there are 35.3 snowfall days, and 7.17" (182mm) of snow is accumulated.

Daylight

The average length of the day in April in Letcher is 13h and 29min.
On the first day of the month, sunrise is at 7:13 am and sunset at 7:59 pm. On the last day of April, sunrise is at 6:25 am and sunset at 8:34 pm CDT.

Sunshine

The average sunshine in April in Letcher is 8h.

UV index

The average daily maximum UV index in April in Letcher is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 4 in April transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in April in Letcher?

The average high-temperature, in April, in Letcher, South Dakota, is 56.8°F (13.8°C), while the average low-temperature is 38.8°F (3.8°C).

What is the average humidity in April in Letcher?

The average relative humidity in April in Letcher, South Dakota, is 67%.

How much does it rain in Letcher in April?

In Letcher, South Dakota, in April, during 11.3 rainfall days, 1.18" (30mm) of precipitation is typically accumulated.

What is the last month it snows in Letcher?

April is the last month it regularly snows in Letcher. During 2.6 snowfall days, in April, Letcher aggregates 0.98" (25mm) of snow.

How many hours of daylight does Letcher have in April?

In Letcher, South Dakota, the average day length in April is 13h and 29min.

What time are sunrise and sunset in April in Letcher?

On the first day of April, sunrise is at 7:13 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 6:25 am and sunset at 8:34 pm CDT.

How long on average sun shines in April in Letcher?

In Letcher, the average sunshine duration in April is 8h.

What is the UV index reading in April in Letcher?

In Letcher, South Dakota, the average daily maximum UV index in April is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Letcher, SD

Average temperature in April - Letcher, SD
  • Average high temperature in April: 56.8°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (24.4°F).

  • Average low temperature in April: 38.8°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (10.2°F).

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Average pressure in April
Letcher, SD

Average pressure in April - Letcher, SD
  • Average pressure in April: 29.93"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in April
Letcher, SD

Average wind speed in April - Letcher, SD
  • Average wind speed in April: 11.2mph

The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).

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Average humidity in April
Letcher, SD

Average humidity in April - Letcher, SD
  • Average humidity in April: 67%

The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are September and October (63%).

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Average rainfall in April
Letcher, SD

Average rainfall in April - Letcher, SD
  • Average rainfall in April: 1.18"

The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February and November (0.28").

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Average rainfall days in April
Letcher, SD

Average rainfall days in April - Letcher, SD
  • Average rainfall days in April: 11.3 days

The month with the highest number of rainy days is June (13.6 days).
The month with the least rainy days is February (1.9 days).

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Average snowfall in April
Letcher, SD

Average snowfall in April - Letcher, SD
  • Average snowfall in April: 0.98"

The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in April
Letcher, SD

Average snowfall days in April - Letcher, SD
  • Average snowfall days in April: 2.6 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in April /
Average sunshine in April
Letcher, SD

Average daylight in April / Average sunshine in April - Letcher, SD
  • Average daylight in April: 13h and 29min

The month with the longest days is June (Average daylight: 15h and 25min).
The month with the shortest days is December (Average daylight: 8h and 58min).

  • Average sunshine in April: 8h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days in April
Letcher, SD

Average sunshine days in April - Letcher, SD
  • Average sunshine days in April: 14.8 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is June (12.8 days).

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Average UV index in April
Letcher, SD

Average UV index in April - Letcher, SD
  • Average UV index in April: 4

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in April
Letcher, SD

Average cloud cover in April - Letcher, SD
  • Average cloud cover in April: 43

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 22).

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Average visibility in April
Letcher, SD

Average visibility in April - Letcher, SD
  • Average visibility in April: 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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