Spearfish
South Dakota, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
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
January, the same as December, in Spearfish, South Dakota, is another subzero cold winter month, with temperature in the range of an average low of 18.5°F (-7.5°C) and an average high of 31.5°F (-0.3°C). In Spearfish, the average high-temperature is practically the same as in December - a still subzero cold 31.5°F (-0.3°C). Weather in January »

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

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

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

May, the last month of the spring, in Spearfish, is a comfortable month, with average temperature ranging between max 61.9°F (16.6°C) and min 43.2°F (6.2°C). In Spearfish, the average high-temperature in May increases, from a fresh 51.4°F (10.8°C) in April, to an enjoyable 61.9°F (16.6°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Spearfish, South Dakota, with average temperature ranging between min 53.8°F (12.1°C) and max 74.8°F (23.8°C). In Spearfish, the average high-temperature in June 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 »

July, like June, in Spearfish, South Dakota, is a moderately hot summer month, with average temperature ranging between max 83.8°F (28.8°C) and min 61°F (16.1°C). With an average high-temperature of 83.8°F (28.8°C) and an average low-temperature of 61°F (16.1°C), July is the warmest month. In July, the average heat index is appraised at 85.1°F (29.5°C). Weather in July »

The last month of the summer, August, is another warm month in Spearfish, South Dakota, with average temperature varying between 59.4°F (15.2°C) and 81.9°F (27.7°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 81.9°F (27.7°C). Weather in August »

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

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

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

December, the first month of the winter, in Spearfish, is still a freezing cold month, with 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 »

What is the most humid month in Spearfish?

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

How many days does it rain in Spearfish?

In Spearfish, during the entire year, the rain falls for 99.6 days and collects up to 15.63" (397mm) of precipitation.

What is the driest month in Spearfish?

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

When does it snow in Spearfish?

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

How much does it snow in Spearfish?

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

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

Months with the lowest UV index in Spearfish, South Dakota, are January, February, April, November and December, with an average maximum UV index of 2.

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 does it snow the most 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 wettest month in Spearfish?

May is the month with the most rainfall in Spearfish, South Dakota. 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.

When are the longest days in Spearfish?

June has the longest days of the year in Spearfish, South Dakota, with an average of 15.5h of daylight.

What is the warmest month in Spearfish?

July is the warmest month in Spearfish, South Dakota, 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?

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

What month has the most sunshine in Spearfish?

The month with the most sunshine in Spearfish, South Dakota, is August, with an average of 11.7h of sunshine.

What is the coldest month in Spearfish?

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

What is the month with the shortest days in Spearfish?

The month with the shortest days is December, with an average of 8.9h of daylight.
Average temperature - Spearfish, SD
Average rainfall - 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 lowest number of rainy days is February (2.9 days).

Average snowfall - Spearfish, SD
Average snowfall days - Spearfish, SD

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

Average daylight / Average sunshine - Spearfish, SD

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

The month with most sunshine is August (Average sunshine: 11.7h).
The month with least sunshine is February (Average sunshine: 5.7h).

Average UV index - Spearfish, SD