Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May signals a minor shift in the average high-temperature, moving from April's enjoyable 67.8°F (19.9°C) to a moderately hot 76.6°F (24.8°C). Gretna's temperature drops to an average low of 55.4°F (13°C) during the nights of May.Humidity
May and December, with an average relative humidity of 76%, are the most humid months in Gretna.Rainfall
The month with the most rainfall in Gretna, Virginia, is May, when the rain falls for 18.3 days and typically aggregates up to 3.82" (97mm) of precipitation.Snowfall
In Gretna, snow does not fall in May through October.Daylight
In May, the average length of the day is 14h and 10min.On the first day of the month, sunrise is at 6:22 am and sunset at 8:06 pm. On the last day of May, in Gretna, Virginia, sunrise is at 5:59 am and sunset at 8:31 pm EDT.
Sunshine
In May, the average sunshine is 9.2h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index in Gretna. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 6 during May morphs into the following directions:
Shield from overexposure. Defense against sun-related harm is required. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Gretna?
What are the most humid months in Gretna?
What is the average humidity in May in Gretna?
What is the rainiest month in Gretna?
How much does it rain in Gretna in May?
When it does not snow in Gretna?
Does it snow in Gretna in May?
What is the average length of the day in May in Gretna?
When is the sunrise / sunset in May in Gretna?
How long on average sun shines in May in Gretna?
What are the months with the highest UV index in Gretna?
What is the UV index reading in May in Gretna?
Average temperature in May
Gretna, VA
- Average high temperature in May: 76.6°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in May: 55.4°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in May
Gretna, VA
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Gretna, VA
- Average wind speed in May: 5.8mph
The windiest months (with the highest average wind speed) are February and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in May
Gretna, VA
- Average humidity in May: 76%
The months with the highest relative humidity are May and December (76%).
The month with the lowest relative humidity is July (69%).
Average rainfall in May
Gretna, VA
- Average rainfall in May: 3.82"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in May
Gretna, VA
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in May
Gretna, VA
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.19").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Gretna, VA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Gretna, VA
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in May: 9h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in May
Gretna, VA
- Average sunshine days in May: 10.9 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in May
Gretna, VA
- Average UV index in May: 6
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, February and December (UV index 2).
Average cloud cover in May
Gretna, VA
- Average cloud cover in May: 41
The months with the most cloud cover are February and March (Cloud cover 44).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in May
Gretna, VA
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Gretna, Virginia, USA
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