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 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
Johns Island's January weather reaches an average high of 56.8°F (13.8°C) and an average low of 42.8°F (6°C), making it the coldest month.Humidity
In January, the average relative humidity is 73%.Rainfall
The month with the least rainfall is January, when the rain falls for 8.8 days and typically collects 0.67" (17mm) of precipitation.Snowfall
January, February and December are months with snowfall in Johns Island. In Johns Island, South Carolina, during January, snow falls for 0.1 days. Throughout the year, in Johns Island, there are 0.5 snowfall days.Daylight
In Johns Island, the average length of the day in January is 10h and 17min.On the first day of January in Johns Island, sunrise is at 7:22 am and sunset at 5:24 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:51 pm EST.
Sunshine
In Johns Island, the average sunshine in January is 5.8h.UV index
With an average maximum UV index of 3, January is the month with the lowest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 3 during January translates into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Johns Island?
What is the average January temperature in Johns Island?
What is the average humidity in January in Johns Island?
What is the driest month in Johns Island?
How many days does it rain in January in Johns Island?
How many days does it snow in January in Johns Island?
How many hours of daylight does Johns Island have in January?
What time are sunrise and sunset in January in Johns Island?
How many hours of sunshine does Johns Island have in January?
When is the lowest UV index in Johns Island?
How high is the UV index in January in Johns Island?
Average temperature in January
Johns Island, SC
- Average high temperature in January: 56.8°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (56.8°F).
- Average low temperature in January: 42.8°F
The month with the highest average low temperature is July (76.5°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure in January
Johns Island, SC
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in January
Johns Island, SC
- Average wind speed in January: 7.8mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in January
Johns Island, SC
- Average humidity in January: 73%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (72%).
Average rainfall in January
Johns Island, SC
- Average rainfall in January: 0.67"
The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in January
Johns Island, SC
- Average rainfall days in January: 8.8 days
The month with the highest number of rainy days is August (22.7 days).
The month with the least rainy days is November (6.9 days).
Average snowfall days in January
Johns Island, SC
- Average snowfall days in January: 0.1 days
The month with the highest number of snowfall days is December (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
Johns Island, SC
- Average daylight in January: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January: 5h and 5min
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 36min).
Average sunshine days in January
Johns Island, SC
- Average sunshine days in January: 20.1 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (6.1 days).
Average UV index in January
Johns Island, SC
- Average UV index in January: 3
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in January
Johns Island, SC
- Average cloud cover in January: 35
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in January
Johns Island, 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).
Johns Island, South Carolina, USA
Weather forecast for your location
2. Allow the app to use your location