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 signals a shift in the average high-temperature, moving from April's fresh 53.6°F (12°C) to a comfortable 63.1°F (17.3°C). May nighttime temperatures hover close to the daytime peak with an average of 54.5°F (12.5°C).Humidity
May is the most humid month, with an average relative humidity of 77%.Rainfall
In May, the rain falls for 11.7 days. Throughout May, 0.83" (21mm) of precipitation is accumulated. In Uniondale, during the entire year, the rain falls for 112.1 days and collects up to 8.66" (220mm) of precipitation.Snowfall
In Uniondale, New York, snow does not fall in April through September.Daylight
In Uniondale, the average length of the day in May is 14h and 28min.On the first day of May, sunrise is at 5:51 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:25 am and sunset at 8:18 pm EDT.
Sunshine
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 medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 5 during May translates into the following guidance:
Guard yourself - Avoiding sunburn is suggested. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Uniondale in May?
What is the most humid month?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
How many hours of daylight does Uniondale have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Uniondale have in May?
What is the UV index intensity in May?
Average temperature in May
Uniondale, NY
- Average high temperature in May: 63.1°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in May: 54.5°F
The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in May
Uniondale, NY
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Uniondale, NY
- Average wind speed in May: 9.5mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity in May
Uniondale, NY
- Average humidity in May: 77%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall in May
Uniondale, NY
- Average rainfall in May: 0.83"
The wettest month (with the highest rainfall) is July (0.98").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in May
Uniondale, NY
- Average rainfall days in May: 11.7 days
The month with the highest number of rainy days is July (12.4 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in May
Uniondale, NY
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.43").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in May
Uniondale, NY
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (4.2 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
Uniondale, NY
- 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 5min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in May
Uniondale, NY
- Average sunshine days in May: 17.4 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (15.1 days).
Average UV index in May
Uniondale, NY
- 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, March and December (UV index 2).
Average cloud cover in May
Uniondale, NY
- Average cloud cover in May: 42
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
Uniondale, NY
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Uniondale, New York, USA
Weather forecast for your location
2. Allow the app to use your location