Expand
Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Letcher, South Dakota, is a freezing cold winter month, with an average temperature varying between 10.2°F (-12.1°C) and 24.4°F (-4.2°C). The coldest period is January, when temperatures fluctuate between an average high of 24.4°F (-4.2°C) and a low of 10.2°F (-12.1°C). Weather in January »
Weather in February
The last month of the winter, February, is also a subzero cold month in Letcher, South Dakota, with an average temperature varying between 14.2°F (-9.9°C) and 28.6°F (-1.9°C). An average high-temperature of a still subzero cold 28.6°F (-1.9°C) marks February, exhibiting a close resemblance to the conditions in January. Weather in February »
Weather in March
March, the first month of the spring in Letcher, is a frosty month, with an average temperature varying between 44.4°F (6.9°C) and 27.9°F (-2.3°C). As February transitions into March, Letcher sees a clear rise in the average high-temperature, escalating from a freezing cold 28.6°F (-1.9°C) to a frosty 44.4°F (6.9°C). Weather in March »
Weather in April
April is a refreshing spring month in Letcher, South Dakota, with an average temperature ranging between min 38.8°F (3.8°C) and max 56.8°F (13.8°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's frosty 44.4°F (6.9°C) to a refreshing 56.8°F (13.8°C). Weather in April »
Weather in May
May, the last month of the spring in Letcher, is an agreeable month, 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). The arrival of May brings an increase in high-temperatures, moving 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
June, the first month of the summer in Letcher, is a moderately hot month, with an average temperature ranging between max 79°F (26.1°C) and min 60.3°F (15.7°C). In June, the meteorological conditions change with the average high-temperature moving 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 a moderately hot summer month, with an average temperature fluctuating between 64.6°F (18.1°C) and 85.6°F (29.8°C). With average high and low temperatures of 85.6°F (29.8°C) and 64.6°F (18.1°C) respectively, July is Letcher's warmest month. For July, the heat index is appraised at a tropical 93.2°F (34°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Letcher, South Dakota, with an average temperature ranging between min 62.1°F (16.7°C) and max 84.4°F (29.1°C). The initiation of August records an average high-temperature of a still warm 84.4°F (29.1°C), displaying a near consistency with the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Letcher, South Dakota, with an average temperature fluctuating between 76.1°F (24.5°C) and 55°F (12.8°C). In the transition to September, Letcher observes a minor drop in the average high-temperature, shifting 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, the same as September, in Letcher, South Dakota, is a moderate autumn month, with temperature in the range of an average high of 58.5°F (14.7°C) and an average low of 42.1°F (5.6°C). The onset of October brings a clear temperature shift, with the average high-temperature decreasing 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 temperature in the range of an average high of 45°F (7.2°C) and an average low of 29.5°F (-1.4°C). The commencement of November indicates a shift in the average high-temperature, receding from October's mild 58.5°F (14.7°C) 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 high of 28.6°F (-1.9°C) and an average low of 16°F (-8.9°C). With the onset of December, Letcher's average high-temperature witnesses a clear drop, receding from November's chilly 45°F (7.2°C) to a subzero cold 28.6°F (-1.9°C). Weather in December »
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
January, having an average high-temperature of 24.4°F (-4.2°C) and an average low-temperature of 10.2°F (-12.1°C), is the coldest month.
What is the most humid month?
January is the most humid month, with an average relative humidity of 87%.
How many days does it rain?
Throughout the year, there are 93.2 rainfall days, and 11.3" (287mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
How many days does it snow?
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?
The month with the least sunshine is January, with an average of 4.4h of sunshine.
What is the month with the lowest UV index?
With an average maximum UV index of 1, January is the month with the lowest UV index.
What is the driest month?
February and November are months with the least rain when the rain falls for 1.9 days and typically aggregates up to 0.28" (7mm) of rain.
When does it snow the most?
The month with the most snowfall 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)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 13.5 days and typically aggregates up to 1.65" (42mm) of precipitation.
When it does not snow?
In Letcher, snow does not fall in May through September.
When are the longest days?
The month with the longest days is June, with an average of 15h and 24min of daylight.
When is the highest UV index?
The months with the highest UV index in Letcher, South Dakota, are June through August, with an average maximum UV index of 6.
What are the warmest months in Letcher?
With average high temperatures of 85.6°F (29.8°C) and lows of 64.6°F (18.1°C), July is the warmest month.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 11.1h of sunshine.
What is the least humid month?
September and October, with an average relative humidity of 63%, are the least humid months in Letcher.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 0min of daylight.
Average temperature
Letcher, SD
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).
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).
Average pressure
Letcher, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.13"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).
Average wind speed
Letcher, SD
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11.2mph - Average wind speed in May:
9.8mph - Average wind speed in June:
9.2mph
- Average wind speed in July:
8.6mph - Average wind speed in August:
8.7mph - Average wind speed in September:
9.7mph - Average wind speed in October:
10.6mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.1mph
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).
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%).
Average rainfall
Letcher, SD
- Average rainfall in January:
0.31" - Average rainfall in February:
0.28" - Average rainfall in March:
0.83" - Average rainfall in April:
1.18" - Average rainfall in May:
1.65" - Average rainfall in June:
1.61"
- Average rainfall in July:
1.54" - Average rainfall in August:
1.14" - Average rainfall in September:
1.18" - Average rainfall in October:
0.79" - Average rainfall in November:
0.28" - Average rainfall in December:
0.51"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February and November (0.28").
Average rainfall days
Letcher, SD
- Average rainfall days in January:
2.6 days - Average rainfall days in February:
1.9 days - Average rainfall days in March:
7.2 days - Average rainfall days in April:
11.3 days - Average rainfall days in May:
13.5 days - Average rainfall days in June:
13.6 days
- Average rainfall days in July:
10.5 days - Average rainfall days in August:
10.5 days - Average rainfall days in September:
9.2 days - Average rainfall days in October:
6.8 days - Average rainfall days in November:
3.2 days - Average rainfall days in December:
2.9 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).
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").
Average snowfall days
Letcher, SD
- Average snowfall days in January:
8.7 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
5.4 days - Average snowfall days in April:
2.6 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.9 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
7.5 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).
Average daylight / Average sunshine
Letcher, SD
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 1min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
9h 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 January:
4h and 2min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 0min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
10h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 3min - Average sunshine in November:
5h and 5min - Average sunshine in December:
4h and 4min
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).
Average sunshine days
Letcher, SD
- Average sunshine days in January:
21.6 days - Average sunshine days in February:
19.8 days - Average sunshine days in March:
18.3 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
14 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
17.8 days - Average sunshine days in August:
17.3 days - Average sunshine days in September:
18.3 days - Average sunshine days in October:
22 days - Average sunshine days in November:
23.4 days - Average sunshine days in December:
21.9 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).
Average UV index
Letcher, SD
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).
Average cloud cover
Letcher, SD
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 22).
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).
Letcher, South Dakota, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location