January weather forecast
Decatur, TX

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Weather in January

January, the same as December, is another fresh winter month in Decatur, Texas, with an average temperature fluctuating between 54°F (12.2°C) and 37.4°F (3°C).

Temperature

Decatur experiences its lowest temperatures in January, with an average peak of 54°F (12.2°C) and a low of 37.4°F (3°C).

Humidity

In Decatur, the average relative humidity in January is 62%.

Rainfall

The month with the least rainfall is January, when the rain falls for 5.7 days and typically collects 1.34" (34mm) of precipitation.

Snowfall

January through March and December are months with snowfall. In Decatur, in January, snow falls for 0.5 days, with typically accumulated 0.2" (5mm) of snow. Throughout the year, there are 3.5 snowfall days, and 1.69" (43mm) of snow is accumulated.

Daylight

In Decatur, the average length of the day in January is 10h and 15min.
On the first day of the month, sunrise is at 7:33 am and sunset at 5:33 pm. On the last day of January, sunrise is at 7:26 am and sunset at 6:00 pm CST.

Sunshine

The average sunshine in January is 6.3h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 3 during January translates into the following directions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Updated: Jul 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month in Decatur?

Decatur records the coldest temperatures in January, averaging a high of 54°F (12.2°C) and a low of 37.4°F (3°C).

What are January temperatures?

The average high-temperature, in January, in Decatur, is 54°F (12.2°C), while the average low-temperature is 37.4°F (3°C).

What is the average humidity in January?

The average relative humidity in January is 62%.

What is the driest month?

January is the month with the least rainfall. Rain falls for 5.7 days and accumulates 1.34" (34mm) of precipitation.

How many days does it rain in January?

In January, the rain falls for 5.7 days. Throughout January, 1.34" (34mm) of precipitation is accumulated.

How many days does it snow in January?

In Decatur, during January, snow falls for 0.5 days and regularly aggregates up to 0.2" (5mm) of snow.

What is the average length of the day in January?

In Decatur, the average day length in January is 10h and 15min.

What time are sunrise and sunset in January in Decatur?

In January, on the first day of the month, sunrise is at 7:33 am and sunset at 5:33 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 6:00 pm CST.

How many hours of sunshine does Decatur have in January?

In January, the average sunshine duration is 6.3h.

When is the lowest UV index?

January and December, with an average maximum UV index of 3, are months with the lowest UV index.

How high is the UV index in January?

In Decatur, the average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Decatur, TX

Average temperature in January - Decatur, TX
  • Average high temperature in January: 54°F

The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (54°F).

  • Average low temperature in January: 37.4°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).

Average pressure in January
Decatur, TX

Average pressure in January - Decatur, TX
  • 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 (29.89"Hg).

Average wind speed in January
Decatur, TX

Average wind speed in January - Decatur, TX
  • Average wind speed in January: 9.3mph

The windiest months (with the highest average wind speed) are March and April (10.7mph).
The calmest month (with the lowest average wind speed) is September (7mph).

Average humidity in January
Decatur, TX

Average humidity in January - Decatur, TX
  • Average humidity in January: 62%

The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).

Average rainfall in January
Decatur, TX

Average rainfall in January - Decatur, TX
  • Average rainfall in January: 1.34"

The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is January (1.34").

Average rainfall days in January
Decatur, TX

Average rainfall days in January - Decatur, TX
  • Average rainfall days in January: 5.7 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.7 days).

Average snowfall in January
Decatur, TX

Average snowfall in January - Decatur, TX
  • Average snowfall in January: 0.2"

The month with the highest snowfall is February (1.14").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in January
Decatur, TX

Average snowfall days in January - Decatur, TX
  • Average snowfall days in January: 0.5 days

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Decatur, TX

Average daylight in January / Average sunshine in January - Decatur, TX
  • Average daylight in January: 10h and 1min

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: 6h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in January
Decatur, TX

Average sunshine days in January - Decatur, TX
  • Average sunshine days in January: 23.6 days

The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is May (13.5 days).

Average UV index in January
Decatur, TX

Average UV index in January - Decatur, TX
  • Average UV index in January: 3

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

Average cloud cover in January
Decatur, TX

Average cloud cover in January - Decatur, TX
  • Average cloud cover in January: 27

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 18).

Average visibility in January
Decatur, TX

Average visibility in January - Decatur, TX
  • 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).

Decatur, Texas, USA

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