Dallas
Texas, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Dallas, TX

Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
January, the same as December, is another fresh winter month in Dallas, Texas, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 39.2°F (4°C).

Temperature

January is the coldest month, with an average high-temperature of 54.3°F (12.4°C) and an average low-temperature of 39.2°F (4°C).

Humidity

In Dallas, Texas, the average relative humidity in January is 64%.

Rainfall

In Dallas, during January, the rain falls for 6.7 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, in Dallas, there are 141.2 rainfall days, and 30.12" (765mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Dallas, Texas, are January, February, November and December. In Dallas, Texas, during January, snow falls for 0.4 days and regularly aggregates up to 0.16" (4mm) of snow. In Dallas, during the entire year, snow falls for 2.2 days, and aggregates up to 0.71" (18mm) of snow.

Daylight

In Dallas, the average length of the day is 10.3h.

Sunshine

In Dallas, the average sunshine in January is 5.9h.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Dallas. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Dallas?

January is the coldest month, with an average high-temperature of 54.3°F (12.4°C) and an average low-temperature of 39.2°F (4°C).

What is the temperature in January in Dallas?

In Dallas, in January, the average high-temperature is 54.3°F (12.4°C), and the average low-temperature is 39.2°F (4°C).

What is the average humidity in January in Dallas?

In January, the average relative humidity in Dallas is 64%.

How much does it rain in Dallas in January?

In Dallas, Texas, in January, it is raining for 6.7 days, with typically 1.69" (43mm) of accumulated precipitation.

How many days does it snow in January in Dallas?

In Dallas, during January, snow falls for 0.4 days and regularly aggregates up to 0.16" (4mm) of snow.

How many hours of daylight does Dallas have in January?

The average length of the day in January is 10.3h.

How many hours of sunshine does Dallas have in January?

The average sunshine in January in Dallas, Texas, is 5.9h.

When is the lowest UV index in Dallas?

Months with the lowest UV index in Dallas, Texas, are January and December, with an average maximum UV index of 3.

What is the UV index intensity in January in Dallas?

In January, the average daily maximum UV index in Dallas, Texas, is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.
Average temperature in January - Dallas, TX
  • Average high temperature in January: 54.3°F

The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (54.3°F).

  • Average low temperature in January: 39.2°F

The month with the highest average low temperature is August (77.2°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).

Average humidity in January - Dallas, TX
  • Average humidity in January: 64%

The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (55%).

Average rainfall in January - Dallas, TX
  • Average rainfall in January: 1.69"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the lowest rainfall) is February (1.61").

Average rainfall days in January - Dallas, TX
  • Average rainfall days in January: 6.7 days

The month with the highest number of rainy days is May (15.8 days).
The month with the lowest number of rainy days is January (6.7 days).

Average snowfall in January - Dallas, TX
  • Average snowfall in January: 0.16"

The month with the highest snowfall is February (0.43").
Months with the lowest snowfall are March, April, May, June, July, August, September and October (0").

Average snowfall days in January - Dallas, TX
  • Average snowfall days in January: 0.4 days

The month with the highest number of snowfall days is February (1.2 days).
Months with the lowest number of snowfall days are March, April, May, June, July, August, September and October (0 days).

Average daylight in January / Average sunshine in January - Dallas, TX
  • Average daylight in January: 10.3h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in January: 5.9h

The month with most sunshine is August (Average sunshine: 11.1h).
The month with least sunshine is December (Average sunshine: 5.6h).

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

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