January weather forecastAlpharetta, GA
January
Weather in January
January in Alpharetta, Georgia, greets the New Year with cool weather and chilly nights with temperatures fluctuating between 33.6°F (0.9°C) and 49.1°F (9.5°C). The climate sees a fair amount of rainfall, marking the onset of a soggy period, while a light dusting of snow is not uncommon. As the day progresses, the sun makes a fair appearance, offering a few hours of relief from the frosty morning. January's weather is characterized by relative humidity, indicating a substantial amount of moisture in the air. Compared to other months, the windspeed is high, providing a cool breeze throughout the day.Temperature
With average high and low temperatures of 49.1°F (9.5°C) and 33.6°F (0.9°C) respectively, January is Alpharetta's coldest month.Humidity
In Alpharetta, the average relative humidity in January is 74%.Rainfall
In January, the rain falls for 10.3 days. Throughout January, 1.57" (40mm) of precipitation is accumulated. Throughout the year, in Alpharetta, there are 158.7 rainfall days, and 26.06" (662mm) of precipitation is accumulated.Snowfall
Months with snowfall in Alpharetta are January through March, November and December. The month with the most snowfall in Alpharetta is January, when snow falls for 1.3 days and typically aggregates up to 0.71" (18mm) of snow.Daylight
The average length of the day in January in Alpharetta is 10h and 11min.On the first day of the month, sunrise is at 7:42 am and sunset at 5:38 pm. On the last day of January, sunrise is at 7:35 am and sunset at 6:06 pm EST.
Sunshine
In January, the average sunshine is 5.6h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Alpharetta. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum UV index of 2 in January translates into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. 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
Alpharetta, GA
- Average high temperature in January: 49.1°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (49.1°F).
- Average low temperature in January: 33.6°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure in January
Alpharetta, 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
Alpharetta, GA
- Average wind speed in January: 7.8mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in January
Alpharetta, GA
- Average humidity in January: 74%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are July and August (69%).
Average rainfall in January
Alpharetta, GA
- Average rainfall in January: 1.57"
The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is October (1.34").
Average rainfall days in January
Alpharetta, GA
- Average rainfall days in January: 10.3 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is October (9 days).
Average snowfall in January
Alpharetta, GA
- Average snowfall in January: 0.71"
The month with the highest snowfall is January (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Alpharetta, GA
- Average snowfall days in January: 1.3 days
The month with the highest number of snowfall days is February (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
Alpharetta, GA
- Average daylight in January: 10h and 12min
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 36min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in January
Alpharetta, GA
- Average sunshine days in January: 18.8 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in January
Alpharetta, GA
- Average UV index in January: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in January
Alpharetta, GA
- Average cloud cover in January: 43
The months with the most cloud cover are February and December (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in January
Alpharetta, 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).
