Climate and monthly weather forecast
Spearfish, SD

The peaceful and quiet area in the Trout Fishing Pond in the scenic Spearfish Canyon, South Dakota, in the Summer Sportsman Paradise
The peaceful and quiet area in the Trout Fishing Pond in the scenic Spearfish Canyon, South Dakota, in the Summer Sportsman Paradise

Weather in January

January, the same as December, in Spearfish, South Dakota, is a freezing cold winter month, with an average temperature fluctuating between 18.5°F (-7.5°C) and 31.5°F (-0.3°C). In Spearfish, the average high-temperature in January is relatively the same as in December - a still freezing cold 31.5°F (-0.3°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Spearfish, South Dakota, with an average temperature fluctuating between 16.2°F (-8.8°C) and 31.1°F (-0.5°C). In February, the average high-temperature is almost the same as in January - a still freezing cold 31.1°F (-0.5°C). Weather in February »

Weather in March

March, the first month of the spring in Spearfish, is a frosty month, with an average temperature ranging between min 27.5°F (-2.5°C) and max 44.1°F (6.7°C). In March, the average high-temperature rises from a freezing cold 31.1°F (-0.5°C) in February to a frosty 44.1°F (6.7°C). Weather in March »

Weather in April

April is a cool spring month in Spearfish, South Dakota, with temperature in the range of an average low of 33.4°F (0.8°C) and an average high of 51.4°F (10.8°C). In April, the average high-temperature marginally rises from a chilly 44.1°F (6.7°C) in March to a cool 51.4°F (10.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Spearfish, South Dakota, with an average temperature fluctuating between 61.9°F (16.6°C) and 43.2°F (6.2°C). In May, the average high-temperature rises from a cool 51.4°F (10.8°C) in April to a comfortable 61.9°F (16.6°C). Weather in May »

Weather in June

June, the first month of the summer in Spearfish, is a moderately hot month, with an average temperature ranging between max 74.8°F (23.8°C) and min 53.8°F (12.1°C). In June, the average high-temperature increases from a comfortable 61.9°F (16.6°C) in May to a moderately hot 74.8°F (23.8°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Spearfish, South Dakota, with temperature in the range of an average high of 83.8°F (28.8°C) and an average low of 61°F (16.1°C). July is the warmest month, with an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 61°F (16.1°C). The average heat index in July is evaluated at 85.1°F (29.5°C). Weather in July »

Weather in August

August, the last month of the summer in Spearfish, is also a moderately hot month, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 59.4°F (15.2°C). In Spearfish, the average high-temperature in August is almost the same as in July - a still moderately hot 81.9°F (27.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Spearfish, South Dakota, with temperature in the range of an average high of 72.5°F (22.5°C) and an average low of 52°F (11.1°C). In September, the average high-temperature drops from a warm 81.9°F (27.7°C) in August to an agreeable 72.5°F (22.5°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Spearfish, South Dakota, with an average temperature fluctuating between 38.3°F (3.5°C) and 54.5°F (12.5°C). In October, the average high-temperature significantly decreases from a pleasant 72.5°F (22.5°C) in September to a cool 54.5°F (12.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a frosty month in Spearfish, South Dakota, with an average temperature varying between 28.2°F (-2.1°C) and 43.5°F (6.4°C). In November, the average high-temperature drops from a cool 54.5°F (12.5°C) in October to a chilly 43.5°F (6.4°C). Weather in November »

Weather in December

The first month of the winter, December, is also a subzero cold month in Spearfish, South Dakota, with an average temperature ranging between min 18.5°F (-7.5°C) and max 30.9°F (-0.6°C). The coldest month is December, with an average high-temperature of 30.9°F (-0.6°C) and an average low-temperature of 18.5°F (-7.5°C). Weather in December »
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FAQ

What is the most humid month in Spearfish?

January is the most humid month in Spearfish, with an average relative humidity of 79%.

What is the driest month in Spearfish?

January is the month with the least rainfall in Spearfish, South Dakota. Rain falls for 3 days and accumulates 0.59" (15mm) of precipitation.

How many days does it rain in Spearfish?

Throughout the year, in Spearfish, there are 99.6 rainfall days, and 15.63" (397mm) of precipitation is accumulated.

When does it snow in Spearfish?

Months with snowfall in Spearfish, South Dakota, are January through May, September through December.

How much does it snow in Spearfish?

In Spearfish, during the entire year, snow falls for 56.8 days and aggregates up to 36.3" (922mm) of snow.

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

January, February, April, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the month with the least sunshine in Spearfish?

The month with the least sunshine in Spearfish, South Dakota, is February, with an average of 5.7h of sunshine.

When is Daylight Saving Time (DST) in Spearfish?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Spearfish, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from MDT to MST.

What is the snowiest month in Spearfish?

April is the month with the most snowfall. Snow falls for 6 days and accumulates 7.36" (187mm) of snow.

What is the rainiest month in Spearfish?

May is the month with the most rainfall. Rain falls for 15.6 days and accumulates 2.32" (59mm) of precipitation.

When it does not snow in Spearfish?

June through August are months without snowfall in Spearfish.

When are the longest days in Spearfish?

The month with the longest days in Spearfish is June, with an average of 15h and 29min of daylight.

What is the warmest month in Spearfish?

The warmest month is July, with an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 61°F (16.1°C).

When is the highest UV index in Spearfish?

The month with the highest UV index is July, with an average maximum UV index of 6.

What is the least humid month in Spearfish?

The least humid month in Spearfish is August, with an average relative humidity of 49%.

What month has the most sunshine in Spearfish?

With an average of 11.7h of sunshine, August has the most sunshine of the year.

What is the coldest month in Spearfish?

December is the coldest month, with an average high-temperature of 30.9°F (-0.6°C) and an average low-temperature of 18.5°F (-7.5°C).

What is the month with the shortest days in Spearfish?

December has the shortest days of the year in Spearfish, South Dakota, with an average of 8h and 54min of daylight.

Average temperature
Spearfish, SD

Average temperature - Spearfish, SD

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (30.9°F).

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).

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Average pressure
Spearfish, SD

Average pressure - Spearfish, SD

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

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Average wind speed
Spearfish, SD

Average wind speed - Spearfish, SD

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (8mph).

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Average rainfall
Spearfish, SD

Average rainfall - Spearfish, SD

The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.59").

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Average rainfall days
Spearfish, SD

Average rainfall days - Spearfish, SD

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (2.9 days).

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Average snowfall
Spearfish, SD

Average snowfall - Spearfish, SD

The month with the highest snowfall is April (7.36").
The months with the least snowfall are June, July and August (0").

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Average snowfall days
Spearfish, SD

Average snowfall days - Spearfish, SD

The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Spearfish, SD

Average daylight / Average sunshine - Spearfish, SD

The month with the longest days is June (Average daylight: 15h and 29min).
The month with the shortest days is December (Average daylight: 8h and 54min).

The month with the most sunshine is August (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 42min).

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Average sunshine days
Spearfish, SD

Average sunshine days - Spearfish, SD

The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is May (12.7 days).

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Average UV index
Spearfish, SD

Average UV index - Spearfish, SD

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, April, November and December (UV index 2).

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Average visibility
Spearfish, SD

Average visibility - Spearfish, 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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