January weather forecast
Irwin, SC

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Weather in January

January, the same as December, in Irwin, South Carolina, is another chilly winter month, with an average temperature fluctuating between 35.2°F (1.8°C) and 49.8°F (9.9°C).

Temperature

Irwin experiences its lowest average temperatures in January, reaching a peak of 49.8°F (9.9°C) and a minimum of 35.2°F (1.8°C).

Humidity

The average relative humidity in January in Irwin, South Carolina, is 72%.

Rainfall

In Irwin, in January, during 7.7 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, in Irwin, there are 120.6 rainfall days, and 11.97" (304mm) of precipitation is accumulated.

Snowfall

January and February are months with snowfall in Irwin. January is the first month it typically snows. Throughout January, in the average 0.4 snowfall days, it receives 0.08" (2mm) of snow. In Irwin, during the entire year, snow falls for 1.2 days and aggregates up to 0.2" (5mm) of snow.

Daylight

The average length of the day in January is 10h and 8min.
On the first day of the month, sunrise is at 7:30 am and sunset at 5:23 pm. On the last day of January, sunrise is at 7:22 am and sunset at 5:51 pm EST.

Sunshine

The average sunshine in January is 5.6h.

UV index

January is the month with the lowest UV index in Irwin, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 2 during January translates into the following directions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
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Frequently asked questions

What is the coldest month in Irwin?

January, noted for its average high-temperature of 49.8°F (9.9°C) and an average low-temperature of 35.2°F (1.8°C), is considered the coldest month.

What is the temperature in January in Irwin?

In Irwin, 49.8°F (9.9°C) is the average high-temperature and 35.2°F (1.8°C) is the average low-temperature during January.

What is the average humidity in January in Irwin?

The average relative humidity in January in Irwin is 72%.

How much does it rain in Irwin in January?

In Irwin, South Carolina, in January, it is raining for 7.7 days, with typically 0.79" (20mm) of accumulated precipitation.

When does it start to snow in Irwin?

January is the first month it typically snows in Irwin, South Carolina. Throughout January, in the average 0.4 snowfall days, it receives 0.08" (2mm) of snow.

How many hours of daylight does Irwin have in January?

In January, the average day length in Irwin is 10h and 8min.

When is the sunrise / sunset in January in Irwin?

On the first day of January in Irwin, South Carolina, sunrise is at 7:30 am and sunset at 5:23 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:51 pm EST.

How long on average sun shines in January in Irwin?

In January, the average sunshine duration in Irwin, South Carolina, is 5.6h.

When is the lowest UV index in Irwin?

The month with the lowest UV index in Irwin, South Carolina, is January, with an average maximum UV index of 2.

What is the UV index intensity in January in Irwin?

In Irwin, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Irwin, SC

Average temperature in January - Irwin, SC
  • Average high temperature in January: 49.8°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.8°F).

  • Average low temperature in January: 35.2°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

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Average pressure in January
Irwin, SC

Average pressure in January - Irwin, SC
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in January
Irwin, SC

Average wind speed in January - Irwin, SC
  • Average wind speed in January: 7.5mph

The windiest months (with the highest average wind speed) are February and April (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity in January
Irwin, SC

Average humidity in January - Irwin, SC
  • Average humidity in January: 72%

The months with the highest relative humidity are May and December (75%).
The months with the lowest relative humidity are June, July and November (71%).

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Average rainfall in January
Irwin, SC

Average rainfall in January - Irwin, SC
  • Average rainfall in January: 0.79"

The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is September (0.51").

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Average rainfall days in January
Irwin, SC

Average rainfall days in January - Irwin, SC
  • Average rainfall days in January: 7.7 days

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (5.9 days).

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Average snowfall in January
Irwin, SC

Average snowfall in January - Irwin, SC
  • Average snowfall in January: 0.08"

The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in January
Irwin, SC

Average snowfall days in January - Irwin, SC
  • Average snowfall days in January: 0.4 days

The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in January /
Average sunshine in January
Irwin, SC

Average daylight in January / Average sunshine in January - Irwin, SC
  • Average daylight in January: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in January: 5h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in January
Irwin, SC

Average sunshine days in January - Irwin, SC
  • Average sunshine days in January: 21.8 days

The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is July (12.9 days).

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Average UV index in January
Irwin, SC

Average UV index in January - Irwin, SC
  • Average UV index in January: 2

The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).

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Average cloud cover in January
Irwin, SC

Average cloud cover in January - Irwin, SC
  • Average cloud cover in January: 37

The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 28).

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Average visibility in January
Irwin, SC

Average visibility in January - Irwin, SC
  • 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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Irwin, South Carolina, USA

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