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 brings a temperature change, with average high-temperatures moving from April's mild 58.6°F (14.8°C) to an agreeable 70.2°F (21.2°C). An average low-temperature of 49.3°F (9.6°C) marks the nights throughout May.Humidity
In May, the average relative humidity is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 19.1 days and typically aggregates up to 3.31" (84mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.2 snowfall days, in May, Port Royal aggregates 0.16" (4mm) of snow. In Port Royal, during the entire year, snow falls for 35.2 days and aggregates up to 16.42" (417mm) of snow.Daylight
In Port Royal, the average length of the day in May is 14h and 27min.On the first day of May, sunrise is at 6:07 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 8:33 pm EDT.
Sunshine
In May, the average sunshine is 8.3h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Avoiding the Sun during its peak radiation time around midday is a healthy practice. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Port Royal?
What is the average humidity in May in Port Royal?
What is the rainiest month?
How many days does it rain in May in Port Royal?
What is the last month it snows?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Port Royal, PA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in May: 49.3°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in May
Port Royal, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in May
Port Royal, PA
- Average wind speed in May: 5.8mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in May
Port Royal, PA
- Average humidity in May: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is July (75%).
Average rainfall in May
Port Royal, PA
- Average rainfall in May: 3.31"
The wettest month (with the highest rainfall) is May (3.31").
The driest months (with the least rainfall) are January and November (1.85").
Average rainfall days in May
Port Royal, PA
- Average rainfall days in May: 19.1 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in May
Port Royal, PA
- Average snowfall in May: 0.16"
The month with the highest snowfall is January (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Port Royal, PA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Port Royal, PA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Port Royal, PA
- Average sunshine days in May: 10.4 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in May
Port Royal, PA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Port Royal, PA
- Average cloud cover in May: 48
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in May
Port Royal, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Port Royal, Pennsylvania, USA
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