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
The arrival of May sees a shift in the average high-temperature, moving from an enjoyable 64.9°F (18.3°C) in April to a moderately hot 75.2°F (24°C). During the month of May, an average temperature of 54.3°F (12.4°C) is noted during the nights.Humidity
In May, the average relative humidity in Portsmouth is 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 18.3 days and typically aggregates up to 3.19" (81mm) of precipitation.Snowfall
In Portsmouth, snow does not fall in May through September.Daylight
The average length of the day in May is 14h and 18min.On the first day of May in Portsmouth, sunrise is at 6:33 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 8:50 pm EDT.
Sunshine
In Portsmouth, the average sunshine in May is 9.1h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 6 in May leads to these guidelines:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Frequently asked questions
What are May temperatures in Portsmouth?
What is the average humidity in May in Portsmouth?
What is the wettest month in Portsmouth?
How many days does it rain in May in Portsmouth?
When it does not snow in Portsmouth?
Does it snow in Portsmouth in May?
How many hours of daylight does Portsmouth have in May?
What time are sunrise and sunset in May in Portsmouth?
How many hours of sunshine does Portsmouth have in May?
When is the highest UV index in Portsmouth?
What is the UV index reading in May in Portsmouth?
Average temperature in May
Portsmouth, OH
- Average high temperature in May: 75.2°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.8°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
Portsmouth, OH
- Average pressure in May: 30"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in May
Portsmouth, OH
- Average wind speed in May: 6mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in May
Portsmouth, OH
- Average humidity in May: 78%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (75%).
Average rainfall in May
Portsmouth, OH
- Average rainfall in May: 3.19"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in May
Portsmouth, OH
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (10.5 days).
Average snowfall in May
Portsmouth, OH
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.19").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Portsmouth, OH
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (10.6 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
Portsmouth, OH
- 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 1min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in May
Portsmouth, OH
- Average sunshine days in May: 10.2 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is February (10 days).
Average UV index in May
Portsmouth, 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, November and December (UV index 2).
Average cloud cover in May
Portsmouth, OH
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in May
Portsmouth, OH
- Average visibility in May: 5mi
The months with the highest visibility are March, April, June, October and November (6mi).
The months with the lowest visibility are January, February, May, July, August, September and December (5mi).
Portsmouth, Ohio, USA
Weather forecast for your location
2. Allow the app to use your location
