January weather forecastRock Hill, SC
January
Weather in January
Rock Hill, South Carolina can be quite chilly in January as it transitions from late winter into early spring. This month registers the lowest number of bright hours in a year with an average daylight period of 10.1 hours and a peak sunshine duration of just 5.4 hours. Relative humidity levels, typically at 72% during this month, add a damp chill to the air. With considerably less heat than what summer months retain, the level of cloud cover stands at a robust 39%. Living does however offer compensation with the lure of splendid winter snow, although January's average snowfall is modest at 1.18" (30mm).Temperature
In Rock Hill, South Carolina, the month of January registers the lowest temperatures, averaging 49.6°F (9.8°C) at the peak and 34.2°F (1.2°C) at the lowest.Humidity
The average relative humidity in January is 72%.Rainfall
In Rock Hill, in January, during 10.8 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. In Rock Hill, South Carolina, during the entire year, the rain falls for 159 days and collects up to 32.76" (832mm) of precipitation.Snowfall
Months with snowfall in Rock Hill are January through March and December. In Rock Hill, South Carolina, in January, snow falls for 1.1 days, with typically accumulated 1.18" (30mm) of snow. Throughout the year, there are 3.9 snowfall days, and 3.66" (93mm) of snow is accumulated.Daylight
In January, the average length of the day in Rock Hill is 10h and 7min.On the first day of January in Rock Hill, sunrise is at 7:31 am and sunset at 5:23 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:51 pm EST.
Sunshine
The average sunshine in January is 5.4h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In January, a daily maximum UV index of 2 leads to the following instructions:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Rock Hill, SC
- Average high temperature in January: 49.6°F
The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in January: 34.2°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (34.2°F).
Average pressure in January
Rock Hill, 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 (29.98"Hg).
Average wind speed in January
Rock Hill, SC
- Average wind speed in January: 7.1mph
The windiest month (with the highest average wind speed) is April (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in January
Rock Hill, SC
- Average humidity in January: 72%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is July (69%).
Average rainfall in January
Rock Hill, SC
- Average rainfall in January: 2.76"
The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in January
Rock Hill, SC
- Average rainfall days in January: 10.8 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is November (9.6 days).
Average snowfall in January
Rock Hill, SC
- Average snowfall in January: 1.18"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in January
Rock Hill, SC
- Average snowfall days in January: 1.1 days
The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
Rock Hill, SC
- Average daylight in January: 10h and 6min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January: 5h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in January
Rock Hill, SC
- Average sunshine days in January: 17.6 days
The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in January
Rock Hill, SC
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in January
Rock Hill, SC
- Average cloud cover in January: 39
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in January
Rock Hill, 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).
