Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December's onset corresponds with a shift in the average high-temperature, moving from a frosty 48°F (8.9°C) in November to a wintry 37.4°F (3°C). During the month of December, the nighttime temperature in Gretna falls to an average of 27.3°F (-2.6°C).Humidity
In Gretna, Ohio, the average relative humidity in December is 83%.Rainfall
In December, in Gretna, the rain falls for 5.6 days. Throughout December, 0.43" (11mm) of precipitation is accumulated. In Gretna, Ohio, during the entire year, the rain falls for 82.2 days and collects up to 6.02" (153mm) of precipitation.Snowfall
Months with snowfall in Gretna are January through April, October through December. In December, it is snowing for 4.4 days. Throughout December, 0.43" (11mm) of snow is accumulated. In Gretna, during the entire year, snow falls for 21.1 days and aggregates up to 1.85" (47mm) of snow.Daylight
The month with the shortest days in Gretna is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:39 am and sunset at 5:09 pm. On the last day of December, in Gretna, Ohio, sunrise is at 7:58 am and sunset at 5:19 pm EST.
Sunshine
The average sunshine in December in Gretna is 3.9h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 1 in December interprets into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
How cold is it in Gretna in December?
What is the average humidity in December in Gretna?
How much does it rain in Gretna in December?
How much does it snow in Gretna in December?
What is the month with the shortest days in Gretna?
What is the average length of the day in December in Gretna?
What time are sunrise and sunset in December in Gretna?
How long on average sun shines in December in Gretna?
When is the lowest UV index in Gretna?
How high is the UV index in December in Gretna?
Average temperature in December
Gretna, OH
- Average high temperature in December: 37.4°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in December: 27.3°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Gretna, OH
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Gretna, OH
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in December
Gretna, OH
- Average humidity in December: 83%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Gretna, OH
- Average rainfall in December: 0.43"
The wettest month (with the highest rainfall) is June (0.75").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in December
Gretna, OH
- Average rainfall days in December: 5.6 days
The month with the highest number of rainy days is May (10 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in December
Gretna, OH
- Average snowfall in December: 0.43"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Gretna, OH
- Average snowfall days in December: 4.4 days
The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Gretna, OH
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Gretna, OH
- Average sunshine days in December: 23.2 days
The month with the most sunshine days is November (23.7 days).
The month with the least sunshine days is May (17.5 days).
Average UV index in December
Gretna, OH
- Average UV index in December: 1
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Gretna, OH
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in December
Gretna, OH
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
Gretna, Ohio, USA
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