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, noted for its average high-temperature of 49.3°F (9.6°C) and an average low-temperature of 34.2°F (1.2°C), is considered the coldest month.Humidity
In Roswell, the average relative humidity in January is 74%.Rainfall
In Roswell, in January, during 12.3 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Roswell, during the entire year, the rain falls for 183.1 days and collects up to 45.12" (1146mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. The month with the most snowfall in Roswell is January, when snow falls for 1.5 days and typically aggregates up to 1.18" (30mm) of snow.Daylight
The average length of the day in January is 10h and 11min.On the first day of January, sunrise is at 7:42 am and sunset at 5:38 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 6:06 pm EST.
Sunshine
The average sunshine in January is 5.5h.UV index
In Roswell, the average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: During January, 3 as the daily maximum UV index converts into the following advice:
Act with care - The need to guard against sun damage is communicated. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
What are January temperatures?
What is the average humidity in January?
How much does it rain in January?
When does it snow the most?
How many days does it snow in January?
How many hours of daylight does Roswell have in January?
When are sunrise and sunset in January?
How long on average sun shines in January?
What is the UV index intensity in January?
Average temperature in January
Roswell, GA
- Average high temperature in January: 49.3°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 (49.3°F).
- Average low temperature in January: 34.2°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 (34.2°F).
Average pressure in January
Roswell, GA
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in January
Roswell, GA
- Average wind speed in January: 8mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in January
Roswell, GA
- Average humidity in January: 74%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are July and August (68%).
Average rainfall in January
Roswell, GA
- Average rainfall in January: 3.15"
The wettest month (with the highest rainfall) is August (5.55").
The driest month (with the least rainfall) is October (2.36").
Average rainfall days in January
Roswell, GA
- Average rainfall days in January: 12.3 days
The month with the highest number of rainy days is July (20.8 days).
The months with the least rainy days are October and November (10.3 days).
Average snowfall in January
Roswell, GA
- Average snowfall in January: 1.18"
The month with the highest snowfall is January (1.18").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Roswell, GA
- Average snowfall days in January: 1.5 days
The month with the highest number of snowfall days is January (1.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Roswell, GA
- 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in January
Roswell, GA
- Average sunshine days in January: 16.7 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is July (8 days).
Average UV index in January
Roswell, GA
- Average UV index in January: 3
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in January
Roswell, GA
- Average cloud cover in January: 44
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in January
Roswell, GA
- 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).
Roswell, Georgia, USA
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