Climate and monthly weather forecast
Letcher, SD

Weather in January

January, like December, is a freezing cold winter month in Letcher, South Dakota, with temperature in the range of an average high of 24.4°F (-4.2°C) and an average low of 10.2°F (-12.1°C). With an average high-temperature of 24.4°F (-4.2°C) and an average low-temperature of 10.2°F (-12.1°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Letcher, is also a subzero cold month, with an average temperature varying between 28.6°F (-1.9°C) and 14.2°F (-9.9°C). In Letcher, the average high-temperature in February is essentially the same as in January - a still subzero cold 28.6°F (-1.9°C). Weather in February »

Weather in March

March, the first month of the spring in Letcher, is a chilly month, with an average temperature varying between 27.9°F (-2.3°C) and 44.4°F (6.9°C). In Letcher, the average high-temperature in March increases considerably from a freezing cold 28.6°F (-1.9°C) in February to a chilly 44.4°F (6.9°C). Weather in March »

Weather in April

April in Letcher, South Dakota, is a mild spring month, with an average temperature varying between 38.8°F (3.8°C) and 56.8°F (13.8°C). In April, the average high-temperature rises from a frosty 44.4°F (6.9°C) in March to a mild 56.8°F (13.8°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Letcher, South Dakota, with temperature in the range of an average high of 68.4°F (20.2°C) and an average low of 50°F (10°C). In Letcher, South Dakota, the average high-temperature in May increases from a moderate 56.8°F (13.8°C) in April to an agreeable 68.4°F (20.2°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Letcher, South Dakota, with an average temperature varying between 60.3°F (15.7°C) and 79°F (26.1°C). In Letcher, the average high-temperature in June rises from a pleasant 68.4°F (20.2°C) in May to a moderately hot 79°F (26.1°C). Weather in June »

Weather in July

July, like June, in Letcher, South Dakota, is another warm summer month, with an average temperature ranging between max 85.6°F (29.8°C) and min 64.6°F (18.1°C). July is the warmest month, with an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 64.6°F (18.1°C). The average heat index in July is appraised at a tropical 93.2°F (34°C). Weather in July »

Weather in August

August, the last month of the summer in Letcher, is another warm month, with an average temperature ranging between min 62.1°F (16.7°C) and max 84.4°F (29.1°C). In August, the average high-temperature is relatively the same as in July - a still warm 84.4°F (29.1°C). Weather in August »

Weather in September

September, the first month of the autumn in Letcher, is also a moderately hot month, with temperature in the range of an average high of 76.1°F (24.5°C) and an average low of 55°F (12.8°C). In Letcher, the average high-temperature in September marginally drops from a moderately hot 84.4°F (29.1°C) in August to a still warm 76.1°F (24.5°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Letcher, South Dakota, with an average temperature varying between 58.5°F (14.7°C) and 42.1°F (5.6°C). In Letcher, the average high-temperature in October significantly decreases from a moderately hot 76.1°F (24.5°C) in September to a moderate 58.5°F (14.7°C). Weather in October »

Weather in November

November, the last month of the autumn in Letcher, is another chilly month, with an average temperature varying between 45°F (7.2°C) and 29.5°F (-1.4°C). In November, the average high-temperature drops from a mild 58.5°F (14.7°C) in October to a chilly 45°F (7.2°C). Weather in November »

Weather in December

December, the first month of the winter in Letcher, is also a subzero cold month, with temperature in the range of an average low of 16°F (-8.9°C) and an average high of 28.6°F (-1.9°C). In Letcher, South Dakota, the average high-temperature in December plummets from a frosty 45°F (7.2°C) in November to a freezing cold 28.6°F (-1.9°C). Weather in December »
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FAQ

What is the coldest month in Letcher?

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).

What is the most humid month in Letcher?

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

How many days does it rain in Letcher?

In Letcher, during the entire year, the rain falls for 93.2 days and collects up to 11.3" (287mm) of precipitation.

When does it snow in Letcher?

Months with snowfall are January through April, October through December.

How much does it snow in Letcher?

In Letcher, during the entire year, snow falls for 35.3 days and aggregates up to 7.17" (182mm) of snow.

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.

When is the lowest UV index in Letcher?

The month with the lowest UV index in Letcher, South Dakota, is January, with an average maximum UV index of 1.

What is the driest month in Letcher?

The months with the least rainfall are February and November Rain falls for 1.9 days and accumulates 0.28" (7mm) of rain.

When does it snow the most in Letcher?

The month with the most snowfall in Letcher is February, when snow falls for 7.3 days and typically aggregates up to 1.42" (36mm) of snow.

When is Daylight Saving Time (DST) in Letcher?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Letcher, South Dakota, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the wettest month in Letcher?

May is the month with the most rainfall in Letcher. Rain falls for 13.5 days and accumulates 1.65" (42mm) of precipitation.

When it does not snow in Letcher?

May through September are months without snowfall in Letcher.

When are the longest days in Letcher?

The month with the longest days in Letcher is June, with an average of 15h and 25min of daylight.

What are the months with the highest UV index in Letcher?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the warmest month in Letcher?

July is the warmest month, with an average high-temperature of 85.6°F (29.8°C) and an average low-temperature of 64.6°F (18.1°C).

What month has the most sunshine in Letcher?

July has the most sunshine of the year in Letcher, with an average of 11.1h of sunshine.

What are the least humid months in Letcher?

The months with the lowest humidity in Letcher are September and October, with an average relative humidity of 63%.

What is the month with the shortest days in Letcher?

With an average of 8h and 58min of daylight, December has the shortest days of the year.

Average pressure
Letcher, SD

Average pressure - Letcher, SD

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
Letcher, SD

Average wind speed - Letcher, SD

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
Letcher, SD

Average humidity - Letcher, SD

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
Letcher, SD

Average rainfall - Letcher, SD

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
Letcher, SD

Average rainfall days - Letcher, SD

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
Letcher, SD

Average snowfall - Letcher, SD

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
Letcher, SD

Average snowfall days - Letcher, SD

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 / Average sunshine
Letcher, SD

Average daylight / Average sunshine - Letcher, SD

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).

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
Letcher, SD

Average sunshine days - Letcher, SD

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 visibility
Letcher, SD

Average visibility - Letcher, SD

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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