January weather forecast
Decatur, AL

Weather in January

January, like December, is another chilly winter month in Decatur, Alabama, with temperature in the range of an average low of 33.3°F (0.7°C) and an average high of 47.5°F (8.6°C).

Temperature

The coldest month is January, with an average high-temperature of 47.5°F (8.6°C) and an average low-temperature of 33.3°F (0.7°C).

Humidity

The average relative humidity in January in Decatur is 76%.

Rainfall

In January, the rain falls for 12.3 days. Throughout January, 3.94" (100mm) of precipitation is accumulated. Throughout the year, in Decatur, there are 177.6 rainfall days, and 43.11" (1095mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Decatur, Alabama. The months with the most snowfall are January and February, with an average 0.55" (14mm) of accumulated snow.

Daylight

In Decatur, the average length of the day in January is 10h and 9min.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:48 pm. On the last day of January, in Decatur, sunrise is at 6:46 am and sunset at 5:16 pm CST.

Sunshine

In January, the average sunshine is 4.9h.

UV index

The months with the lowest UV index in Decatur are January and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Decatur?

The coldest month is January, with an average high-temperature of 47.5°F (8.6°C) and an average low-temperature of 33.3°F (0.7°C).

What is the average humidity in January in Decatur?

In Decatur, Alabama, the average relative humidity in January is 76%.

How much does it rain in Decatur in January?

In Decatur, in January, it is raining for 12.3 days, with typically 3.94" (100mm) of accumulated precipitation.

What is the snowiest month in Decatur?

The months with the most snowfall in Decatur are January and February, with an average 0.55" (14mm) of accumulated snow.

How much does it snow in Decatur in January?

In January, in Decatur, Alabama, it is snowing for 2 days. Throughout January, 0.55" (14mm) of snow is accumulated.

How many hours of daylight does Decatur have in January?

The average day length in January in Decatur is 10h and 9min.

When is the sunrise / sunset in January in Decatur?

On the first day of January in Decatur, sunrise is at 6:54 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 5:16 pm CST.

How long on average sun shines in January in Decatur?

In January, the average sunshine duration in Decatur, Alabama, is 4.9h.

When is the lowest UV index in Decatur?

The months with the lowest UV index in Decatur are January and December, with an average maximum UV index of 2.

What is the UV index reading in January in Decatur?

In January, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Decatur, AL

Average temperature in January - Decatur, AL
  • Average high temperature in January: 47.5°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (47.5°F).

  • Average low temperature in January: 33.3°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).

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Average pressure in January
Decatur, AL

Average pressure in January - Decatur, AL
  • 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).

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Average wind speed in January
Decatur, AL

Average wind speed in January - Decatur, AL
  • Average wind speed in January: 8.3mph

The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).

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Average humidity in January
Decatur, AL

Average humidity in January - Decatur, AL
  • Average humidity in January: 76%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in January
Decatur, AL

Average rainfall in January - Decatur, AL
  • Average rainfall in January: 3.94"

The wettest month (with the highest rainfall) is December (4.45").
The driest months (with the least rainfall) are September and November (2.48").

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Average rainfall days in January
Decatur, AL

Average rainfall days in January - Decatur, AL
  • Average rainfall days in January: 12.3 days

The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (10.4 days).

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Average snowfall in January
Decatur, AL

Average snowfall in January - Decatur, AL
  • Average snowfall in January: 0.55"

The months with the highest snowfall are January and February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in January
Decatur, AL

Average snowfall days in January - Decatur, AL
  • Average snowfall days in January: 2 days

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in January / Average sunshine in January - Decatur, AL
  • Average daylight in January: 10h and 9min

The month with the longest days is June (Average daylight: 14h and 26min).
The month with the shortest days is December (Average daylight: 9h and 53min).

  • Average sunshine in January: 4h and 54min

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 36min).

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Average sunshine days in January
Decatur, AL

Average sunshine days in January - Decatur, AL
  • Average sunshine days in January: 16.1 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (8.8 days).

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Average UV index in January
Decatur, AL

Average UV index in January - Decatur, AL
  • 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).

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Average cloud cover in January
Decatur, AL

Average cloud cover in January - Decatur, AL
  • Average cloud cover in January: 47

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in January
Decatur, AL

Average visibility in January - Decatur, AL
  • 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).

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