January weather forecast
Letcher, SD

Weather in January

January, like December, is another subzero cold winter month in Letcher, South Dakota, with an average temperature fluctuating between 10.2°F (-12.1°C) and 24.4°F (-4.2°C).

Temperature

The coldest month is January, with an average high-temperature of 24.4°F (-4.2°C) and an average low-temperature of 10.2°F (-12.1°C).

Humidity

The most humid month is January, with an average relative humidity of 87%.

Rainfall

In Letcher, during 2.6 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. In Letcher, South Dakota, during the entire year, the rain falls for 93.2 days and collects up to 11.3" (287mm) of precipitation.

Snowfall

Months with snowfall in Letcher are January through April, October through December. In Letcher, snow falls for 8.7 days, with typically accumulated 1.38" (35mm) of snow. In Letcher, during the entire year, snow falls for 35.3 days and aggregates up to 7.17" (182mm) of snow.

Daylight

In January, the average length of the day is 9h and 21min.
On the first day of the month, sunrise is at 8:06 am and sunset at 5:05 pm. On the last day of January, sunrise is at 7:50 am and sunset at 5:41 pm CST.

Sunshine

The month with the least sunshine in Letcher is January, with an average of 4.4h of sunshine.

UV index

The month with the lowest UV index is January, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Letcher?

January is the coldest month, with an average high-temperature of 24.4°F (-4.2°C) and an average low-temperature of 10.2°F (-12.1°C).

What is the temperature in January in Letcher?

In Letcher, South Dakota, in January, the average high-temperature is 24.4°F (-4.2°C), and the average low-temperature is 10.2°F (-12.1°C).

What is the most humid month in Letcher?

January is the most humid month in Letcher, with an average relative humidity of 87%.

What is the average humidity in January in Letcher?

In Letcher, the average relative humidity in January is 87%.

How many days does it rain in January in Letcher?

In Letcher, in January, it is raining for 2.6 days, with typically 0.31" (8mm) of accumulated precipitation.

How many days does it snow in January in Letcher?

In January, in Letcher, South Dakota, it is snowing for 8.7 days. Throughout January, 1.38" (35mm) of snow is accumulated.

What is the average length of the day in January in Letcher?

In Letcher, the average day length in January is 9h and 21min.

What time are sunrise and sunset in January in Letcher?

In January, on the first day of the month, sunrise is at 8:06 am and sunset at 5:05 pm. On the last day of the month, in Letcher, sunrise is at 7:50 am and sunset at 5:41 pm CST.

What is the month with the least sunshine in Letcher?

With an average of 4.4h of sunshine, January has the least sunshine of the year in Letcher.

How long on average sun shines in January in Letcher?

The average sunshine duration in January is 4.4h.

What is the month with the lowest UV index in Letcher?

January is the month with the lowest UV index, with an average maximum UV index of 1.

What is the UV index reading in January in Letcher?

In Letcher, the average daily maximum UV index in January is 1. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Letcher, SD

Average temperature in January - Letcher, SD
  • Average high temperature in January: 24.4°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 January: 10.2°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 January
Letcher, SD

Average pressure in January - Letcher, SD
  • Average pressure in January: 30.16"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 January
Letcher, SD

Average wind speed in January - Letcher, SD
  • Average wind speed in January: 10.3mph

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 January
Letcher, SD

Average humidity in January - Letcher, SD
  • Average humidity in January: 87%

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 January
Letcher, SD

Average rainfall in January - Letcher, SD
  • Average rainfall in January: 0.31"

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 January
Letcher, SD

Average rainfall days in January - Letcher, SD
  • Average rainfall days in January: 2.6 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 January
Letcher, SD

Average snowfall in January - Letcher, SD
  • Average snowfall in January: 1.38"

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 January
Letcher, SD

Average snowfall days in January - Letcher, SD
  • Average snowfall days in January: 8.7 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 January /
Average sunshine in January
Letcher, SD

Average daylight in January / Average sunshine in January - Letcher, SD
  • Average daylight in January: 9h and 21min

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 January: 4h and 24min

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 January
Letcher, SD

Average sunshine days in January - Letcher, SD
  • Average sunshine days in January: 21.6 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 January
Letcher, SD

Average UV index in January - Letcher, SD
  • Average UV index in January: 1

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 January
Letcher, SD

Average cloud cover in January - Letcher, SD
  • Average cloud cover in January: 52

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 January
Letcher, SD

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