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
The coldest period tends to be January, when average temperatures fluctuate between a high of 44.2°F (6.8°C) and a low of 29.8°F (-1.2°C).Humidity
The average relative humidity in January is 78%.Rainfall
In Rock Island, Tennessee, in January, during 11.5 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Rock Island, Tennessee, during the entire year, the rain falls for 177.3 days and collects up to 31.02" (788mm) of precipitation.Snowfall
Months with snowfall in Rock Island are January through April, November and December. In Rock Island, during January, snow falls for 3.6 days and regularly aggregates up to 0.47" (12mm) of snow. In Rock Island, Tennessee, during the entire year, snow falls for 11 days and aggregates up to 1.61" (41mm) of snow.Daylight
The average length of the day in January in Rock Island is 10h and 4min.On the first day of January, sunrise is at 6:52 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 5:08 pm CST.
Sunshine
In Rock Island, Tennessee, the average sunshine in January is 4.6h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index in Rock Island, Tennessee. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: In January, an average UV index of 2 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 Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Keep in mind! Snow's reflective quality can nearly 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 are the coldest months in Rock Island?
How cold is January in Rock Island?
What is the average humidity in January in Rock Island?
How many days does it rain in January in Rock Island?
How many days does it snow in January in Rock Island?
How many hours of daylight does Rock Island have in January?
When are sunrise and sunset in January in Rock Island?
How long on average sun shines in January in Rock Island?
What are the months with the lowest UV index in Rock Island?
What is the UV index intensity in January in Rock Island?
Average temperature in January
Rock Island, TN
- Average high temperature in January: 44.2°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in January: 29.8°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in January
Rock Island, TN
- Average pressure in January: 30.17"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in January
Rock Island, TN
- Average wind speed in January: 7mph
The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in January
Rock Island, TN
- Average humidity in January: 78%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are October and November (76%).
Average rainfall in January
Rock Island, TN
- Average rainfall in January: 2.05"
The wettest month (with the highest rainfall) is July (3.82").
The driest month (with the least rainfall) is November (1.65").
Average rainfall days in January
Rock Island, TN
- Average rainfall days in January: 11.5 days
The month with the highest number of rainy days is July (20.9 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in January
Rock Island, TN
- Average snowfall in January: 0.47"
The month with the highest snowfall is February (0.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Rock Island, TN
- Average snowfall days in January: 3.6 days
The month with the highest number of snowfall days is January (3.6 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
Rock Island, TN
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in January
Rock Island, TN
- Average sunshine days in January: 16.6 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is July (8.4 days).
Average UV index in January
Rock Island, TN
- 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
Rock Island, TN
- Average cloud cover in January: 52
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in January
Rock Island, TN
- Average visibility in January: 5mi
The months with the highest visibility are February, April, June, October and November (6mi).
The months with the lowest visibility are January, March, May, July, August, September and December (5mi).
Rock Island, Tennessee, USA
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