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
Temperature readings reach their annual highs in January, averaging 33.4°F (0.8°C) and a minimum average of 21°F (-6.1°C).Humidity
In South Jacksonville, the average relative humidity in January is 79%.Rainfall
In South Jacksonville, during January, the rain falls for 7.1 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, there are 148.2 rainfall days, and 29.37" (746mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in South Jacksonville. January is the month with the most snowfall in South Jacksonville. Snow falls for 9.6 days and accumulates 3.58" (91mm) of snow.Daylight
The average length of the day in January is 9h and 44min.On the first day of January in South Jacksonville, sunrise is at 7:21 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:18 pm CST.
Sunshine
January has the least sunshine of the year in South Jacksonville, with an average of 4.3h of sunshine.UV index
January, February, November 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: The average daily UV index of 2 in January transforms into the following instructions:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the coldest time of year in South Jacksonville?
How cold is it in South Jacksonville in January?
What is the average humidity in January in South Jacksonville?
How much does it rain in South Jacksonville in January?
What is the snowiest month in South Jacksonville?
How much does it snow in South Jacksonville in January?
How many hours of daylight does South Jacksonville have in January?
When is the sunrise / sunset in January in South Jacksonville?
What is the month with the least sunshine in South Jacksonville?
How long on average sun shines in January in South Jacksonville?
What is the month with the lowest UV index in South Jacksonville?
What is the UV index intensity in January in South Jacksonville?
Average temperature in January
South Jacksonville, IL
- Average high temperature in January: 33.4°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in January: 21°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in January
South Jacksonville, IL
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
South Jacksonville, IL
- Average wind speed in January: 10.1mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in January
South Jacksonville, IL
- Average humidity in January: 79%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
South Jacksonville, IL
- Average rainfall in January: 1.69"
The wettest month (with the highest rainfall) is June (3.58").
The driest month (with the least rainfall) is December (1.54").
Average rainfall days in January
South Jacksonville, IL
- Average rainfall days in January: 7.1 days
The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and February (7.1 days).
Average snowfall in January
South Jacksonville, IL
- Average snowfall in January: 3.58"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
South Jacksonville, IL
- Average snowfall days in January: 9.6 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
South Jacksonville, IL
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in January
South Jacksonville, IL
- Average sunshine days in January: 15.9 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in January
South Jacksonville, IL
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
South Jacksonville, IL
- Average cloud cover in January: 53
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in January
South Jacksonville, IL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
South Jacksonville, Illinois, USA
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