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 in Gretna brings an increase in the average high-temperature, progressing from an enjoyable 61.3°F (16.3°C) in April to a pleasant 71.2°F (21.8°C). May nights are marked by an average temperature drop to a cool 53.8°F (12.1°C).Humidity
The average relative humidity in May is 72%.Rainfall
In Gretna, in May, it is raining for 16.3 days, with typically 3.62" (92mm) of accumulated precipitation. Throughout the year, in Gretna, Nebraska, there are 120.7 rainfall days, and 22.87" (581mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Gretna aggregates 0.24" (6mm) of snow. Throughout the year, in Gretna, Nebraska, there are 30 snowfall days, and 9.65" (245mm) of snow is accumulated.Daylight
In Gretna, Nebraska, the average length of the day in May is 14h and 31min.On the first day of May, sunrise is at 6:21 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:54 am and sunset at 8:50 pm CDT.
Sunshine
The average sunshine in May in Gretna is 8.9h.UV index
The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Gretna in May?
What is the average humidity in May in Gretna?
How much does it rain in Gretna in May?
What is the last month it snows in Gretna?
How many hours of daylight does Gretna have in May?
When is the sunrise / sunset in May in Gretna?
How many hours of sunshine does Gretna have in May?
How high is the UV index in May in Gretna?
Average temperature in May
Gretna, NE
- Average high temperature in May: 71.2°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in May: 53.8°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in May
Gretna, NE
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Gretna, NE
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in May
Gretna, NE
- Average humidity in May: 72%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (65%).
Average rainfall in May
Gretna, NE
- Average rainfall in May: 3.62"
The wettest month (with the highest rainfall) is June (3.7").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in May
Gretna, NE
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in May
Gretna, NE
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Gretna, NE
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (8.5 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, NE
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in May
Gretna, NE
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in May
Gretna, NE
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Gretna, NE
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in May
Gretna, NE
- Average visibility in May: 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).
Gretna, Nebraska, USA
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