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 shift into May is characterized by a rise in the average high-temperature, transitioning from April's moderate 59.5°F (15.3°C) to an agreeable 70.3°F (21.3°C). In May, the nighttime temperature in Port Jefferson lowers to an average of 54°F (12.2°C).Humidity
The average relative humidity in May is 79%.Rainfall
The months with the most rainfall are May and June, with an average 1.06" (27mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Port Jefferson. During 0.2 snowfall days, in May, Port Jefferson aggregates 0.04" (1mm) of snow. In Port Jefferson, during the entire year, snow falls for 27.1 days and aggregates up to 2.8" (71mm) of snow.Daylight
The average length of the day in May is 14h and 26min.On the first day of May, sunrise is at 6:34 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:08 am and sunset at 8:59 pm EDT.
Sunshine
In Port Jefferson, the average sunshine in May is 8.9h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 5 in May suggests the following recommendations:
Guard yourself - Avoiding sunburn is suggested. The Sun's radiation is especially intense around midday; try to stay in shade during this period. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
What is the rainiest month in Port Jefferson?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Port Jefferson, OH
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in May: 54°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in May
Port Jefferson, OH
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Port Jefferson, OH
- Average wind speed in May: 8.1mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in May
Port Jefferson, OH
- Average humidity in May: 79%
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is October (75%).
Average rainfall in May
Port Jefferson, OH
- Average rainfall in May: 1.06"
The wettest months (with the highest rainfall) are May and June (1.06").
The driest month (with the least rainfall) is November (0.47").
Average rainfall days in May
Port Jefferson, OH
- Average rainfall days in May: 13.2 days
The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (5 days).
Average snowfall in May
Port Jefferson, OH
- Average snowfall in May: 0.04"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Port Jefferson, OH
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Port Jefferson, OH
- Average daylight in May: 14h and 2min
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 24min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Port Jefferson, OH
- Average sunshine days in May: 13.9 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (13.6 days).
Average UV index in May
Port Jefferson, OH
- 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, October, November and December (UV index 2).
Average cloud cover in May
Port Jefferson, OH
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Port Jefferson, OH
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
Port Jefferson, Ohio, USA
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