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's arrival signals a temperature shift, moving from a comfortable 64.6°F (18.1°C) in April to a moderately hot 74.8°F (23.8°C). Throughout May in Portland, a steady low-temperature average of 55.4°F (13°C) is noted.Humidity
In Portland, the average relative humidity in May 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 the month, sunrise is at 6:39 am and sunset at 8:30 pm. On the last day of May, sunrise is at 6:14 am and sunset at 8:56 pm EDT.
Sunshine
In Portland, the average sunshine in May is 9h.UV index
In Portland, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 5 suggests these recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
What are the temperatures in Portland in May?
What is the average humidity in May in Portland?
What is the wettest month in Portland?
How many days does it rain in May in Portland?
When it does not snow in Portland?
Does it snow in Portland in May?
How many hours of daylight does Portland have in May?
When are sunrise and sunset in May in Portland?
How many hours of sunshine does Portland have in May?
What is the UV index reading in May in Portland?
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 2min
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).
Portland, Kentucky, USA
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