January weather forecastRock Hill, NY
January
Weather in January
January, the same as December, in Rock Hill, New York, is another subzero cold winter month, with an average temperature varying between 29.8°F (-1.2°C) and 17.1°F (-8.3°C).Temperature
In Rock Hill, the month of January is known for its lowest average temperatures, reaching a high of 29.8°F (-1.2°C) and a low of 17.1°F (-8.3°C).Humidity
The average relative humidity in January is 83%.Rainfall
January and February are months with the least rain when the rain falls for 7.5 days and typically aggregates up to 1.65" (42mm) of rain.Snowfall
Months with snowfall are January through May, October through December. In Rock Hill, in January, snow falls for 8.3 days, with typically accumulated 4.8" (122mm) of snow. In Rock Hill, during the entire year, snow falls for 42.6 days and aggregates up to 20.98" (533mm) of snow.Daylight
In Rock Hill, the average length of the day in January is 9h and 34min.On the first day of the month, sunrise is at 7:25 am and sunset at 4:38 pm. On the last day of January, sunrise is at 7:11 am and sunset at 5:12 pm EST.
Sunshine
In Rock Hill, the average sunshine in January is 4.3h.UV index
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 in January translates into this advice:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Rock Hill, NY
- Average high temperature in January: 29.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in January: 17.1°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in January
Rock Hill, NY
- Average pressure in January: 30.06"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Rock Hill, NY
- Average wind speed in January: 7.8mph
The windiest months (with the highest average wind speed) are January and February (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in January
Rock Hill, NY
- Average humidity in January: 83%
The months with the highest relative humidity are February and December (85%).
The month with the lowest relative humidity is July (77%).
Average rainfall in January
Rock Hill, NY
- Average rainfall in January: 1.65"
The wettest month (with the highest rainfall) is May (2.8").
The driest months (with the least rainfall) are January and February (1.65").
Average rainfall days in January
Rock Hill, NY
- Average rainfall days in January: 7.5 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (7.5 days).
Average snowfall in January
Rock Hill, NY
- Average snowfall in January: 4.8"
The month with the highest snowfall is December (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Rock Hill, NY
- Average snowfall days in January: 8.3 days
The month with the highest number of snowfall days is February (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Rock Hill, NY
- Average daylight in January: 9h and 36min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January: 4h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in January
Rock Hill, NY
- Average sunshine days in January: 18.3 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in January
Rock Hill, NY
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in January
Rock Hill, NY
- Average cloud cover in January: 54
The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 38).
Average visibility in January
Rock Hill, NY
- Average visibility in January: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (5mi).
The months with the lowest visibility are May and September (4mi).
