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 tends to be the coldest month, with temperatures averaging a daily high of 45.5°F (7.5°C) and a low of 30.6°F (-0.8°C).Humidity
The average relative humidity in January in Decatur is 76%.Rainfall
In Decatur, in January, during 12.5 rainfall days, 3.39" (86mm) of precipitation is typically accumulated. Throughout the year, there are 171.8 rainfall days, and 41.81" (1062mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Decatur. The month with the most snowfall is January, when snow falls for 4.8 days and typically aggregates up to 1.02" (26mm) of snow.Daylight
In Decatur, Tennessee, the average length of the day in January is 10h and 5min.On the first day of the month, sunrise is at 7:48 am and sunset at 5:36 pm. On the last day of January, sunrise is at 7:39 am and sunset at 6:05 pm EST.
Sunshine
In Decatur, the average sunshine in January is 5.2h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 2 during January translates into the following directions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. 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 are the coldest months in Decatur?
What is the average January temperature in Decatur?
What is the average humidity in January in Decatur?
How much does it rain in Decatur in January?
What is the snowiest month in Decatur?
How many days does it snow in January in Decatur?
How many hours of daylight does Decatur have in January?
When are sunrise and sunset in January in Decatur?
How many hours of sunshine does Decatur have in January?
What is the month with the lowest UV index in Decatur?
How high is the UV index in January in Decatur?
Average temperature in January
Decatur, TN
- Average high temperature in January: 45.5°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in January: 30.6°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 (30.6°F).
Average pressure in January
Decatur, TN
- Average pressure in January: 30.16"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in January
Decatur, TN
- Average wind speed in January: 6.2mph
The windiest months (with the highest average wind speed) are February, March and April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.9mph).
Average humidity in January
Decatur, TN
- Average humidity in January: 76%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, August, October and November (75%).
Average rainfall in January
Decatur, TN
- Average rainfall in January: 3.39"
The wettest months (with the highest rainfall) are July and December (4.29").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in January
Decatur, TN
- Average rainfall days in January: 12.5 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in January
Decatur, TN
- Average snowfall in January: 1.02"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Decatur, TN
- Average snowfall days in January: 4.8 days
The month with the highest number of snowfall days is January (4.8 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
Decatur, 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: 5h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in January
Decatur, TN
- Average sunshine days in January: 15 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in January
Decatur, 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, February and December (UV index 2).
Average cloud cover in January
Decatur, TN
- Average cloud cover in January: 48
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in January
Decatur, TN
- Average visibility in January: 5mi
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and March (5mi).
Decatur, Tennessee, USA
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