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
With the transition into May, Portland experiences an increase in average high-temperatures, moving up from a comfortable 64.2°F (17.9°C) in April to a warm 75°F (23.9°C). The average low-temperature of 54.3°F (12.4°C) is witnessed during May.Humidity
The average relative humidity in May in Portland is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 19.4 days and accumulates 4.02" (102mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Portland, Ohio. During 0.1 snowfall days, in May, Portland aggregates 0.2" (5mm) of snow. Throughout the year, in Portland, 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, Ohio, the average sunshine in May is 8.7h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 6 during May, leads to the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the usual temperature for 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?
What is the last month it snows in Portland?
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 in Portland?
How high is the UV index in May in Portland?
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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