Contents
- 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
Weather in January
Temperature
January is the coldest month, with an average high-temperature of 49.8°F (9.9°C) and an average low-temperature of 35.2°F (1.8°C).Humidity
In Irwin, the average relative humidity in January is 72%.Rainfall
In Irwin, in January, it is raining for 7.7 days, with typically 0.79" (20mm) of accumulated precipitation. In Irwin, during the entire year, the rain falls for 120.6 days and collects up to 11.97" (304mm) of precipitation.Snowfall
Months with snowfall are January and February. January is the first month it typically snows. Throughout January, in the average 0.4 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 1.2 snowfall days, and 0.2" (5mm) of snow is accumulated.Daylight
The average length of the day in January is 10h and 8min.On the first day of January, 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.
Sunshine
In Irwin, the average sunshine in January is 5.6h.UV index
With an average maximum UV index of 2, January is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 2 during January translates into the following guidance:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
What are the temperatures in January?
What is the average humidity in January?
How many days does it rain in January?
When does it start to snow?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
What is the month with the lowest UV index?
How high is the UV index in January?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Irwin, South Carolina, USA
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