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
Portland, Ohio, in May experiences an increase in the average high-temperature, moving from April's refreshing 64.2°F (17.9°C) to a moderately hot 75°F (23.9°C). May brings Portland a consistent average low-temperature of 54.3°F (12.4°C).Humidity
In Portland, the average relative humidity in May is 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 19.4 days and typically aggregates up to 4.02" (102mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Portland aggregates 0.2" (5mm) of snow. Throughout the year, there are 40.4 snowfall days, and 15.91" (404mm) of snow is accumulated.Daylight
In Portland, the average length of the day in May is 14h and 19min.On the first day of the month, sunrise is at 6:27 am and sunset at 8:20 pm. On the last day of May, in Portland, sunrise is at 6:03 am and sunset at 8:46 pm EDT.
Sunshine
In Portland, the average sunshine in May is 8.7h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 6 during May translates into the following guidance:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Portland in May?
What is the average humidity in May?
What is the rainiest month?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Portland have in May?
What time are sunrise and sunset in May in Portland?
How many hours of sunshine does Portland have in May?
When is the highest UV index?
What is the UV index reading in May?
Average temperature in May
Portland, OH
- Average high temperature in May: 75°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in May: 54.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in May
Portland, OH
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in May
Portland, OH
- Average wind speed in May: 5.7mph
The windiest months (with the highest average wind speed) are January and February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in May
Portland, OH
- Average humidity in May: 78%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is August (75%).
Average rainfall in May
Portland, OH
- Average rainfall in May: 4.02"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in May
Portland, OH
- Average rainfall days in May: 19.4 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is November (10.8 days).
Average snowfall in May
Portland, OH
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Portland, OH
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Portland, OH
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Portland, OH
- Average sunshine days in May: 9.5 days
The month with the most sunshine days is November (17.5 days).
The months with the least sunshine days are February and May (9.5 days).
Average UV index in May
Portland, OH
- 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
Portland, OH
- Average cloud cover in May: 46
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in May
Portland, OH
- Average visibility in May: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Portland, Ohio, USA
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