January weather - Winter 2024

Weather in January
Frequently asked questions
Average temperature in January
Average pressure in January
Average wind speed in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average snowfall in January
Average snowfall days in January
Average daylight in January
Average sunshine in January
Average sunshine days in January
Average UV index in January
Average cloud cover in January
Average visibility in January

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

Expect a chilly start to the year with considerable cloudiness in Spearfish, South Dakota. The outlook is predominantly cold with high temperatures barely exceeding freezing point at 31.5°F (-0.3°C). It is common to see snowfall, contributing to the winter wonderland ambiance of the city. Sunshine is infrequent and days are short, contributing to the overall brisk climate. Due to the high pressures, winds blowing at moderate speeds become a defining characteristic of January's weather.

Temperature

January's average high-temperature in Spearfish stands at a still freezing cold 31.5°F (-0.3°C), showing little deviation from December's 30.9°F (-0.6°C). Spearfish in January experiences a low-temperature average of 18.5°F (-7.5°C).

Humidity

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

Rainfall

The month with the least rainfall is January, when the rain falls for 3 days and typically collects 0.59" (15mm) of precipitation.

Snowfall

Months with snowfall are January through May, September through December. In Spearfish, South Dakota, in January, snow falls for 9.7 days, with typically accumulated 3.31" (84mm) of snow. Throughout the year, there are 56.8 snowfall days, and 36.3" (922mm) of snow is accumulated.

Daylight

In Spearfish, the average length of the day in January is 9h and 17min.
On the first day of January in Spearfish, sunrise is at 7:31 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:02 pm MST.

Sunshine

In Spearfish, the average sunshine in January is 5.8h.

UV index

The months with the lowest UV index are January, February, April, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In January, a daily maximum UV index of 2 leads to the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.

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Frequently asked questions

How cold is January in Spearfish?

In January, the average high-temperature and low-temperature are 31.5°F (-0.3°C) and 18.5°F (-7.5°C) respectively.

What is the most humid month in Spearfish?

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

What is the average humidity in January in Spearfish?

The average relative humidity in January in Spearfish, South Dakota, is 79%.

What is the driest month in Spearfish?

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

How many days does it rain in January in Spearfish?

In Spearfish, South Dakota, in January, during 3 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

How many days does it snow in January in Spearfish?

In January, it is snowing for 9.7 days. Throughout January, 3.31" (84mm) of snow is accumulated.

How many hours of daylight does Spearfish have in January?

The average day length in January is 9h and 17min.

When is the sunrise / sunset in January in Spearfish?

In January, on the first day of the month, sunrise is at 7:31 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:02 pm MST.

How many hours of sunshine does Spearfish have in January?

In Spearfish, South Dakota, the average sunshine duration in January is 5.8h.

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

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

What is the UV index intensity in January in Spearfish?

In January, the average daily maximum UV index in Spearfish is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

30.9°F -0.6°C

31.5°F -0.3°C

31.1°F -0.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.7mph 17.2km/h

10.9mph 17.5km/h

10.1mph 16.3km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

19.9

18.3

15.2

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Spearfish, SD

Average high temperature in January: 31.5°F

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).

Average low temperature in January: 18.5°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 in January
Spearfish, SD

Average pressure in January: 30.14"Hg

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 in January
Spearfish, SD

Average wind speed in January: 10.2mph

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 humidity in January
Spearfish, SD

Average humidity in January: 79%

The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in January
Spearfish, SD

Average rainfall in January: 0.59"

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 in January
Spearfish, SD

Average rainfall days in January: 3 days

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 in January
Spearfish, SD

Average snowfall in January: 3.31"

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 in January
Spearfish, SD

Average snowfall days in January: 9.7 days

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 in January /
Average sunshine in January
Spearfish, SD

Average daylight in January: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

Average sunshine in January: 5h and 5min

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 in January
Spearfish, SD

Average sunshine days in January: 18.3 days

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 in January
Spearfish, SD

Average UV index in January: 2

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 cloud cover in January
Spearfish, SD

Average cloud cover in January: 40

The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 16).

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Average visibility in January
Spearfish, SD

Average visibility in January: 6mi

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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January weather forecast
Spearfish, SD

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