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's onset witnesses a shift in the average high-temperature, moving from a fresh 51.4°F (10.8°C) in April to a comfortable 64.6°F (18.1°C). Portlandville records an average nighttime low of 44.8°F (7.1°C) in May.Humidity
April and May, with an average relative humidity of 79%, are the least humid months in Portlandville.Rainfall
In May, the rain falls for 18.1 days. Throughout May, 2.87" (73mm) of precipitation is accumulated. Throughout the year, in Portlandville, there are 161.4 rainfall days, and 31.26" (794mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Portlandville aggregates 0.47" (12mm) of snow. In Portlandville, during the entire year, snow falls for 92.9 days and aggregates up to 48.27" (1226mm) of snow.Daylight
In Portlandville, New York, the average length of the day in May is 14h and 38min.On the first day of the month, sunrise is at 5:53 am and sunset at 8:00 pm. On the last day of May, in Portlandville, New York, sunrise is at 5:25 am and sunset at 8:30 pm EDT.
Sunshine
In May, the average sunshine is 8.1h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, the maximum UV index of 5 translates into these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Portlandville in May?
What is the least humid month in Portlandville?
What is the average humidity in May in Portlandville?
How much does it rain in Portlandville in May?
What is the last month it snows in Portlandville?
How many hours of daylight does Portlandville have in May?
When are sunrise and sunset in May in Portlandville?
How many hours of sunshine does Portlandville have in May?
When is the highest UV index in Portlandville?
What is the UV index reading in May in Portlandville?
Average temperature in May
Portlandville, NY
- Average high temperature in May: 64.6°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in May: 44.8°F
The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in May
Portlandville, NY
- Average pressure in May: 30"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
Portlandville, NY
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in May
Portlandville, NY
- Average humidity in May: 79%
The months with the highest relative humidity are January, February and December (87%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in May
Portlandville, NY
- Average rainfall in May: 2.87"
The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in May
Portlandville, NY
- Average rainfall days in May: 18.1 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is February (6.6 days).
Average snowfall in May
Portlandville, NY
- Average snowfall in May: 0.47"
The month with the highest snowfall is February (9.13").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Portlandville, NY
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is January (20.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Portlandville, NY
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).
Average sunshine days in May
Portlandville, NY
- Average sunshine days in May: 10.6 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (5.5 days).
Average UV index in May
Portlandville, NY
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in May
Portlandville, NY
- Average cloud cover in May: 51
The month with the most cloud cover is February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 41).
Average visibility in May
Portlandville, NY
- Average visibility in May: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
Portlandville, New York, USA
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