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
In Gretna, January records the lowest average temperatures, peaking at 60.4°F (15.8°C) and reaching a low of 42.3°F (5.7°C).Humidity
In January, the average relative humidity is 73%.Rainfall
In Gretna, in January, during 10.3 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. Throughout the year, in Gretna, there are 184.9 rainfall days, and 37.6" (955mm) of precipitation is accumulated.Snowfall
The only month with snowfall in Gretna is January. January is the month with the most snowfall. Snow falls for 0.2 days and accumulates 0.04" (1mm) of snow.Daylight
In Gretna, Florida, the average length of the day in January is 10h and 26min.On the first day of the month, sunrise is at 7:35 am and sunset at 5:48 pm. On the last day of January, sunrise is at 7:30 am and sunset at 6:13 pm EST.
Sunshine
The average sunshine in January in Gretna is 6.7h.UV index
The month with the lowest UV index is January, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 in January converts into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Gretna?
What is the average January temperature in Gretna?
What is the average humidity in January in Gretna?
How much does it rain in Gretna in January?
When does it snow the most in Gretna?
When does it start to snow in Gretna?
What is the average length of the day in January in Gretna?
When are sunrise and sunset in January in Gretna?
How long on average sun shines in January in Gretna?
What is the month with the lowest UV index in Gretna?
What is the UV index intensity in January in Gretna?
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).
Average pressure in January
Gretna, FL
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
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).
Average humidity in January
Gretna, FL
- Average humidity in January: 73%
The months with the highest relative humidity are August and December (78%).
The month with the lowest relative humidity is May (72%).
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").
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).
Average snowfall in January
Gretna, FL
- Average snowfall in January: 0.04"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
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).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in January /
Average sunshine in January
Gretna, FL
- Average daylight in January: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in January: 6h and 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
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).
Average UV index in January
Gretna, FL
- Average UV index in January: 3
The 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).
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).
The months with the least cloud cover are May and October (Cloud cover 29).
Average visibility in January
Gretna, FL
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, October and November (6mi).
The months with the lowest visibility are July, August, September and December (5mi).
Gretna, Florida, USA
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