January weather forecast and climate
Gretna, FL

Weather in January

January, the same as December, in Gretna, Florida, is another mild winter month, with average temperature ranging between min 42.3°F (5.7°C) and max 60.4°F (15.8°C).

Temperature

With an average high-temperature of 60.4°F (15.8°C) and an average low-temperature of 42.3°F (5.7°C), January is the coldest month.

Humidity

In January, the average relative humidity in Gretna is 73%.

Rainfall

In Gretna, during January, the rain falls for 10.3 days and regularly aggregates up to 1.93" (49mm) of precipitation. Throughout the year, in Gretna, there are 184.9 rainfall days, and 37.6" (955mm) of precipitation is accumulated.

Snowfall

January is the only month when snow falls. The month with the most snowfall is January when snow falls for 0.2 days and typically aggregates up to 0.04" (1mm) of snow.

Daylight

In January, the average length of the day in Gretna, Florida, is 10.4h.

Sunshine

In Gretna, Florida, the average sunshine is 6.7h.

UV index

With an average maximum UV index of 3, January is the month with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: In January, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Gretna?

January is the coldest month in Gretna, with an average high-temperature of 60.4°F (15.8°C) and an average low-temperature of 42.3°F (5.7°C).

What is the temperature in January in Gretna?

The average high-temperature, in January, in Gretna, is 60.4°F (15.8°C), while the average low-temperature is 42.3°F (5.7°C).

What is the average humidity in January in Gretna?

In Gretna, the average relative humidity in January is 73%.

How much does it rain in Gretna in January?

In Gretna, Florida, in January, it is raining for 10.3 days, with typically 1.93" (49mm) of accumulated precipitation.

When does it start to snow in Gretna?

January is the first month it typically snows. Throughout January, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

What is the snowiest month in Gretna?

The month with the most snowfall in Gretna, Florida, is January when snow falls for 0.2 days and typically aggregates up to 0.04" (1mm) of snow.

How many hours of daylight does Gretna have in January?

In January, the average length of the day in Gretna, Florida, is 10.4h.

How long on average sun shines in January in Gretna?

In Gretna, the average sunshine in January is 6.7h.

What is the month with the lowest UV index in Gretna?

January is the month with the lowest UV index in Gretna, with an average maximum UV index of 3.

How high is the UV index in January in Gretna?

The average daily maximum UV index in January is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in January
Gretna, FL

Average temperature in January - Gretna, FL
  • Average high temperature in January: 60.4°F

The warmest months (with the highest average high temperature) are July and August (90.7°F).
The month with the lowest average high temperature is January (60.4°F).

  • Average low temperature in January: 42.3°F

The month with the highest average low temperature is August (73.6°F).
The coldest month (with the lowest average low temperature) is January (42.3°F).

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Average pressure in January
Gretna, FL

Average pressure in January - Gretna, FL
  • Average pressure in January: 30.16"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June, August and September (29.98").

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Average wind speed in January
Gretna, FL

Average wind speed in January - Gretna, FL
  • Average wind speed in January: 6.6mph

The windiest months (with the highest average wind speed) are January and March (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity in January
Gretna, FL

Average humidity in January - Gretna, FL
  • Average humidity in January: 73%

Months with the highest relative humidity are August and December (78%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in January
Gretna, FL

Average rainfall in January - Gretna, FL
  • Average rainfall in January: 1.93"

The wettest month (with the highest rainfall) is August (5.08").
The driest month (with the least rainfall) is November (1.46").

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Average rainfall days in January
Gretna, FL

Average rainfall days in January - Gretna, FL
  • Average rainfall days in January: 10.3 days

The month with the highest number of rainy days is July (26.1 days).
The month with the least rainy days is November (8.1 days).

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Average snowfall in January
Gretna, FL

Average snowfall in January - Gretna, FL
  • Average snowfall in January: 0.04"

The month with the highest snowfall is January (0.04").
Months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in January
Gretna, FL

Average snowfall days in January - Gretna, FL
  • Average snowfall days in January: 0.2 days

The month with the highest number of snowfall days is January (0.2 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight in January /
Average sunshine in January
Gretna, FL

Average daylight in January / Average sunshine in January - Gretna, FL
  • Average daylight in January: 10.4h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in January: 6.7h

Months with the most sunshine are June and July (Average sunshine: 10.5h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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Average sunshine days in January
Gretna, FL

Average sunshine days in January - Gretna, FL
  • Average sunshine days in January: 19.3 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (3.4 days).

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Average UV index in January
Gretna, FL

Average UV index in January - Gretna, FL
  • Average UV index in January: 3

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

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Average cloud cover in January
Gretna, FL

Average cloud cover in January - Gretna, FL
  • Average cloud cover in January: 37

The month with the most cloud cover is December (Cloud cover 43).
Months with the least cloud cover are May and October (Cloud cover 29).

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Average visibility in January
Gretna, FL

Average visibility in January - Gretna, FL
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, March, April, May, June, October and November (6mi).
Months with the lowest visibility are July, August, September and December (5mi).

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