Climate and monthly weather forecast
Fort Thompson, SD

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Weather in January

January, like December, is a freezing cold winter month in Fort Thompson, South Dakota, with an average temperature fluctuating between 26.1°F (-3.3°C) and 12.6°F (-10.8°C). In Fort Thompson, the month of January registers the lowest temperatures, averaging 26.1°F (-3.3°C) at the peak and 12.6°F (-10.8°C) at the lowest. Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Fort Thompson, South Dakota, with an average temperature ranging between min 15.3°F (-9.3°C) and max 29.8°F (-1.2°C). February welcomes an average high-temperature of a still subzero cold 29.8°F (-1.2°C), not much different from the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Fort Thompson, South Dakota, with temperature in the range of an average high of 45°F (7.2°C) and an average low of 29.1°F (-1.6°C). With the onset of March, Fort Thompson experiences a distinct temperature rise, with the average high-temperature advancing from February's freezing cold 29.8°F (-1.2°C) to a chilly 45°F (7.2°C). Weather in March »

Weather in April

April in Fort Thompson, South Dakota, is a mild spring month, with temperature in the range of an average high of 56.3°F (13.5°C) and an average low of 38.3°F (3.5°C). The shift from March to April is marked by an increase in the average high-temperature, moving from a frosty 45°F (7.2°C) to a moderate 56.3°F (13.5°C). Weather in April »

Weather in May

May, the last month of the spring in Fort Thompson, is a refreshing month, with temperature in the range of an average high of 67.8°F (19.9°C) and an average low of 49.3°F (9.6°C). A shift in the average high-temperature is noticeable in May, changing from a moderate 56.3°F (13.5°C) in April to a still refreshing 67.8°F (19.9°C). Weather in May »

Weather in June

June, the first month of the summer in Fort Thompson, is a moderately hot month, with an average temperature ranging between min 60.4°F (15.8°C) and max 79.7°F (26.5°C). With the beginning of June, Fort Thompson's average high-temperature sees an increase, transitioning from an enjoyable 67.8°F (19.9°C) in May to a warm 79.7°F (26.5°C). Weather in June »

Weather in July

July is a hot summer month in Fort Thompson, South Dakota, with an average temperature fluctuating between 88°F (31.1°C) and 66.2°F (19°C). Fort Thompson's July weather reaches an average high of 88°F (31.1°C) and an average low of 66.2°F (19°C), making it the warmest month. For July, the heat index is computed to be a torrid 95°F (35°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Fort Thompson, South Dakota, with temperature in the range of an average high of 85.8°F (29.9°C) and an average low of 63.7°F (17.6°C). August begins with an average high-temperature of a warm 85.8°F (29.9°C), reflecting close similarity to the preceding month. Weather in August »

Weather in September

September, the first month of the autumn in Fort Thompson, is still a warm month, with an average temperature fluctuating between 76.3°F (24.6°C) and 55.9°F (13.3°C). With September's onset, the average high-temperature recedes from August's 85.8°F (29.9°C) to a still warm 76.3°F (24.6°C). Weather in September »

Weather in October

October, the same as September, in Fort Thompson, South Dakota, is another mild autumn month, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 58.6°F (14.8°C). Fort Thompson, South Dakota, experiences a noticeable temperature shift with the start of October, with average high-temperatures moving from a warm 76.3°F (24.6°C) in September to a moderate 58.6°F (14.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Fort Thompson, South Dakota, with an average temperature ranging between min 29.7°F (-1.3°C) and max 45.5°F (7.5°C). Fort Thompson's November weather comes with a decrease in average high-temperatures, moving from a mild 58.6°F (14.8°C) in October to a frosty 45.5°F (7.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Fort Thompson, South Dakota, with temperature in the range of an average high of 29.1°F (-1.6°C) and an average low of 16.9°F (-8.4°C). The arrival of December brings a distinct temperature shift, with the average high-temperature dropping from a frosty 45.5°F (7.5°C) in November to a subzero cold 29.1°F (-1.6°C). Weather in December »
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Frequently asked questions

What are the coldest months in Fort Thompson?

Temperature records mark January as the coldest month, with highs averaging 26.1°F (-3.3°C) and lows at 12.6°F (-10.8°C).

What is the most humid month in Fort Thompson?

The most humid month is January, with an average relative humidity of 86%.

How much does it rain in Fort Thompson?

In Fort Thompson, during the entire year, the rain falls for 107.6 days and collects up to 17.83" (453mm) of precipitation.

When does it snow in Fort Thompson?

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

How much does it snow in Fort Thompson?

Throughout the year, there are 50.9 snowfall days, and 17.87" (454mm) of snow is accumulated.

What is the month with the least sunshine in Fort Thompson?

With an average of 4.7h of sunshine, January has the least sunshine of the year in Fort Thompson.

When does it snow the most in Fort Thompson?

The month with the most snowfall is February, when snow falls for 11.7 days and typically aggregates up to 3.66" (93mm) of snow.

When is the lowest UV index in Fort Thompson?

February is the month with the lowest UV index in Fort Thompson, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Fort Thompson?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Fort Thompson, 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.

When it does not snow in Fort Thompson?

In Fort Thompson, snow does not fall in May through September.

What is the rainiest month in Fort Thompson?

The month with the most rainfall in Fort Thompson is June, when the rain falls for 14.6 days and typically aggregates up to 3.03" (77mm) of precipitation.

When are the longest days in Fort Thompson?

With an average of 15h and 24min of daylight, June has the longest days of the year in Fort Thompson.

When is the highest UV index in Fort Thompson?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Fort Thompson, South Dakota.

What time of the year is the hottest in Fort Thompson?

In Fort Thompson, July is the month with the highest recorded average temperatures, measuring a high of 88°F (31.1°C) and a low of 66.2°F (19°C).

What month has the most sunshine in Fort Thompson?

With an average of 11.4h of sunshine, July has the most sunshine of the year in Fort Thompson.

What is the least humid month in Fort Thompson?

The least humid month is September, with an average relative humidity of 58%.

What is the driest month in Fort Thompson?

November is the month with the least rainfall in Fort Thompson, South Dakota. Rain falls for 4.1 days and accumulates 0.55" (14mm) of precipitation.

What is the month with the shortest days in Fort Thompson?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

Average temperature
Fort Thompson, SD

Average temperature - Fort Thompson, SD

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (26.1°F).

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).

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Average pressure
Fort Thompson, SD

Average pressure - Fort Thompson, SD

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed
Fort Thompson, SD

Average wind speed - Fort Thompson, SD

The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is August (9.1mph).

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Average humidity
Fort Thompson, SD

Average humidity - Fort Thompson, SD

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is September (58%).

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Average rainfall
Fort Thompson, SD

Average rainfall - Fort Thompson, SD

The wettest month (with the highest rainfall) is June (3.03").
The driest month (with the least rainfall) is November (0.55").

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Average rainfall days
Fort Thompson, SD

Average rainfall days - Fort Thompson, SD

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall
Fort Thompson, SD

Average snowfall - Fort Thompson, SD

The month with the highest snowfall is February (3.66").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Fort Thompson, SD

Average snowfall days - Fort Thompson, SD

The months with the highest number of snowfall days are January and February (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Fort Thompson, SD

Average daylight / Average sunshine - Fort Thompson, SD

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days
Fort Thompson, SD

Average sunshine days - Fort Thompson, SD

The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is April (11.8 days).

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Average visibility
Fort Thompson, SD

Average visibility - Fort Thompson, SD

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

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Fort Thompson, South Dakota, USA

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