Climate and monthly weather forecast
Hecla, SD

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Weather in January

January, the same as December, in Hecla, South Dakota, is a freezing cold winter month, with temperature in the range of an average low of 5.4°F (-14.8°C) and an average high of 19°F (-7.2°C). January stands out as Hecla's coldest month, with temperatures ranging between an average high of 19°F (-7.2°C) and a low of 5.4°F (-14.8°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Hecla, South Dakota, with an average temperature ranging between min 7.3°F (-13.7°C) and max 21.4°F (-5.9°C). Hecla notes an average high-temperature of a still freezing cold 21.4°F (-5.9°C) in February, hardly diverging from January. Weather in February »

Weather in March

March, the first month of the spring in Hecla, is a cold month, with temperature in the range of an average high of 37°F (2.8°C) and an average low of 23°F (-5°C). March's onset is marked by a clear temperature increase, soaring from a freezing cold 21.4°F (-5.9°C) in February to an icy 37°F (2.8°C). Weather in March »

Weather in April

April in Hecla, South Dakota, is a cool spring month, with an average temperature fluctuating between 35.6°F (2°C) and 51.8°F (11°C). The start of April signals a considerable escalation in the average high-temperature, advancing from an icy 37°F (2.8°C) in March to a fresh 51.8°F (11°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Hecla, South Dakota, with an average temperature fluctuating between 48.2°F (9°C) and 65.7°F (18.7°C). May sees a temperature increase, moving from a cool 51.8°F (11°C) in April to an enjoyable 65.7°F (18.7°C). Weather in May »

Weather in June

June, the first month of the summer in Hecla, is a moderately hot month, with an average temperature fluctuating between 57°F (13.9°C) and 75.2°F (24°C). Hecla's transition into June brings a rise in the average high-temperature, moving from a comfortable 65.7°F (18.7°C) in May to a warm 75.2°F (24°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Hecla, South Dakota, with an average temperature fluctuating between 82°F (27.8°C) and 61.9°F (16.6°C). July is the month when Hecla's temperatures reach their peak, with averages of 82°F (27.8°C) and lows of 61.9°F (16.6°C). The heat index value during July is calculated to be a hot 86°F (30°C). Weather in July »

Weather in August

August, the last month of the summer in Hecla, is also a moderately hot month, with temperature in the range of an average low of 59.7°F (15.4°C) and an average high of 81.1°F (27.3°C). August's arrival shows an average high-temperature of a still moderately hot 81.1°F (27.3°C), hardly different from the previous month. Weather in August »

Weather in September

September, the first month of the autumn in Hecla, is still a pleasant month, with temperature in the range of an average low of 52.3°F (11.3°C) and an average high of 72.7°F (22.6°C). With the onset of September, Hecla experiences a modest temperature adjustment, with the average high-temperature gently receding from a moderately hot 81.1°F (27.3°C) in August to a pleasant 72.7°F (22.6°C). Weather in September »

Weather in October

October, like September, in Hecla, South Dakota, is a cool autumn month, with an average temperature fluctuating between 39.6°F (4.2°C) and 54.7°F (12.6°C). With the onset of October, Hecla experiences a distinct temperature drop, with the average high-temperature reducing from September's pleasant 72.7°F (22.6°C) to a cool 54.7°F (12.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Hecla, is also a wintry month, with an average temperature varying between 39.2°F (4°C) and 26.4°F (-3.1°C). As Hecla steps into November, the average high-temperature decreases significantly from the a cool 54.7°F (12.6°C) of October to an icy 39.2°F (4°C). Weather in November »

Weather in December

December, the first month of the winter in Hecla, is still a freezing cold month, with temperature in the range of an average low of 12.2°F (-11°C) and an average high of 22.6°F (-5.2°C). The onset of December witnesses a clear shift in the average high-temperature, dropping from a cold 39.2°F (4°C) in November to a freezing cold 22.6°F (-5.2°C). Weather in December »
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Frequently asked questions

What are the coldest months in Hecla?

Hecla's January weather, with an average high temperature of 19°F (-7.2°C) and an average low temperature of 5.4°F (-14.8°C), tends to be the coldest of the year.

What is the most humid month in Hecla?

January is the most humid month, with an average relative humidity of 90%.

What is the driest month in Hecla?

January is the month with the least rainfall in Hecla. Rain falls for 3.1 days and accumulates 0.63" (16mm) of precipitation.

How much does it rain in Hecla?

Throughout the year, there are 109.5 rainfall days, and 20.39" (518mm) of precipitation is accumulated.

When does it snow in Hecla?

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

How many days does it snow in Hecla?

In Hecla, during the entire year, snow falls for 68.5 days and aggregates up to 22.83" (580mm) of snow.

What is the month with the least sunshine in Hecla?

January has the least sunshine of the year, with an average of 3.7h of sunshine.

What are the months with the lowest UV index in Hecla?

The months with the lowest UV index are January and November, with an average maximum UV index of 1.

When is Daylight Saving Time (DST) in Hecla?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Hecla, 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 rainiest month in Hecla?

June is the month with the most rainfall in Hecla, South Dakota. Rain falls for 16.8 days and accumulates 3.62" (92mm) of precipitation.

When it does not snow in Hecla?

June through September are months without snowfall.

When are the longest days in Hecla?

June has the longest days of the year in Hecla, with an average of 15h and 42min of daylight.

When is the highest UV index in Hecla?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What is the hottest time of year in Hecla?

July, recording an average high temperature of 82°F (27.8°C) and a low temperature of 61.9°F (16.6°C), is Hecla's warmest month.

What month has the most sunshine in Hecla?

July has the most sunshine of the year in Hecla, South Dakota, with an average of 11h of sunshine.

What are the least humid months in Hecla?

August and September, with an average relative humidity of 62%, are the least humid months in Hecla, South Dakota.

When does it snow the most in Hecla?

The month with the most snowfall in Hecla is December, when snow falls for 15.2 days and typically aggregates up to 4.61" (117mm) of snow.

What is the month with the shortest days in Hecla?

December has the shortest days of the year, with an average of 8h and 42min of daylight.

Average pressure
Hecla, SD

Average pressure - Hecla, SD

The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed
Hecla, SD

Average wind speed - Hecla, SD

The windiest month (with the highest average wind speed) is October (10.8mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).

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Average humidity
Hecla, SD

Average humidity - Hecla, SD

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are August and September (62%).

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Average rainfall
Hecla, SD

Average rainfall - Hecla, SD

The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.63").

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Average rainfall days
Hecla, SD

Average rainfall days - Hecla, SD

The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (2.4 days).

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Average snowfall
Hecla, SD

Average snowfall - Hecla, SD

The month with the highest snowfall is December (4.61").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Hecla, SD

Average snowfall days - Hecla, SD

The month with the highest number of snowfall days is January (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Hecla, SD

Average daylight / Average sunshine - Hecla, SD

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days
Hecla, SD

Average sunshine days - Hecla, SD

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is June (10.3 days).

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Average visibility
Hecla, SD

Average visibility - Hecla, SD

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

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Hecla, South Dakota, USA

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