May weather forecast
Gretna, OH

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Weather in May

The last month of the spring, May, is a pleasant month in Gretna, Ohio, with an average temperature varying between 70.3°F (21.3°C) and 53.6°F (12°C).

Temperature

May's onset brings a rise in the average high-temperature, moving from a mild 59.4°F (15.2°C) in April to a pleasant 70.3°F (21.3°C). The average temperature drops to a fresh 53.6°F (12°C) during the night in the month of May.

Humidity

In Gretna, the average relative humidity in May is 79%.

Rainfall

In Gretna, during May, the rain falls for 10 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Gretna, during the entire year, the rain falls for 82.2 days and collects up to 6.02" (153mm) of precipitation.

Snowfall

May through September are months without snowfall in Gretna.

Daylight

In May, the average length of the day is 14h and 26min.
On the first day of the month, sunrise is at 6:33 am and sunset at 8:31 pm. On the last day of May, sunrise is at 6:07 am and sunset at 8:58 pm EDT.

Sunshine

In May, the average sunshine in Gretna, Ohio, is 8.8h.

UV index

In May, the average daily maximum UV index in Gretna is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 5 during May translates into the following directions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Frequently asked questions

What is the usual temperature for Gretna in May?

The high-temperature, in May, in Gretna, is 70.3°F (21.3°C), while the low-temperature averages to 53.6°F (12°C).

What is the average humidity in May in Gretna?

In May, the average relative humidity is 79%.

How many days does it rain in May in Gretna?

In Gretna, Ohio, in May, during 10 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

When it does not snow in Gretna?

In Gretna, Ohio, snow does not fall in May through September.

Does it snow in Gretna in May?

In May, in Gretna, it doesn't snow. April is the latest month when it typically snows.

What is the average length of the day in May in Gretna?

In May, the average day length in Gretna, Ohio, is 14h and 26min.

What time are sunrise and sunset in May in Gretna?

In May, on the first day of the month, sunrise is at 6:33 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 8:58 pm EDT.

How many hours of sunshine does Gretna have in May?

In May, the average sunshine duration is 8.8h.

How high is the UV index in May in Gretna?

In Gretna, Ohio, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Gretna, OH

Average temperature in May - Gretna, OH
  • Average high temperature in May: 70.3°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 May: 53.6°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).

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Average pressure in May
Gretna, OH

Average pressure in May - Gretna, OH
  • Average pressure in May: 29.98"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).

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Average wind speed in May
Gretna, OH

Average wind speed in May - Gretna, OH
  • Average wind speed in May: 8.2mph

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).

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Average humidity in May
Gretna, OH

Average humidity in May - Gretna, OH
  • Average humidity in May: 79%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).

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Average rainfall in May
Gretna, OH

Average rainfall in May - Gretna, OH
  • Average rainfall in May: 0.71"

The wettest month (with the highest rainfall) is June (0.75").
The driest month (with the least rainfall) is September (0.28").

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Average rainfall days in May
Gretna, OH

Average rainfall days in May - Gretna, OH
  • Average rainfall days in May: 10 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).

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Average snowfall in May
Gretna, OH

Average snowfall in May - Gretna, OH
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.47").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in May
Gretna, OH

Average snowfall days in May - Gretna, OH
  • Average snowfall days in May: 0.2 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).

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Average daylight in May /
Average sunshine in May
Gretna, OH

Average daylight in May / Average sunshine in May - Gretna, OH
  • Average daylight in May: 14h 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 May: 8h 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).

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Average sunshine days in May
Gretna, OH

Average sunshine days in May - Gretna, OH
  • Average sunshine days in May: 17.5 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).

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Average UV index in May
Gretna, OH

Average UV index in May - Gretna, OH
  • Average UV index in May: 5

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).

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Average cloud cover in May
Gretna, OH

Average cloud cover in May - Gretna, OH
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in May
Gretna, OH

Average visibility in May - Gretna, OH
  • Average visibility in May: 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).

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Gretna, Ohio, USA

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