May weather forecastPortland, KY
May
Weather in May
The last month of the spring, May, is a warm month in Portland, Kentucky, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 74.8°F (23.8°C).Temperature
The rise of average high-temperatures is seen in May, with an increase from a refreshing 64.6°F (18.1°C) in April to a moderately hot 74.8°F (23.8°C). The average temperature during May nights dips to a refreshing 55.4°F (13°C).Humidity
In May, the average relative humidity is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 17.1 days and typically aggregates up to 3.03" (77mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Portland, the average length of the day in May is 14h and 18min.On the first day of May, sunrise is at 6:39 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 8:56 pm EDT.
Sunshine
In May, the average sunshine is 9h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 5 during May morphs into the following directions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Portland, KY
- Average high temperature in May: 74.8°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (37.4°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 (24.4°F).
Average pressure in May
Portland, KY
- Average pressure in May: 29.98"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Portland, KY
- Average wind speed in May: 6.6mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in May
Portland, KY
- Average humidity in May: 79%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (74%).
Average rainfall in May
Portland, KY
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in May
Portland, KY
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (9.8 days).
Average snowfall in May
Portland, KY
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.89").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Portland, KY
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Portland, KY
- Average daylight in May: 14h and 18min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Portland, KY
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in May
Portland, KY
- 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
Portland, KY
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Portland, KY
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are February, May and July (5mi).
