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 start of May signals an increase in the average high-temperature, moving from a frosty 47.8°F (8.8°C) in April to a moderate 58.8°F (14.9°C). Portland's temperature drops to an average low of 48.2°F (9°C) during the nights of May.Humidity
The average relative humidity in May in Portland is 82%.Rainfall
In Portland, New York, during May, the rain falls for 18 days and regularly aggregates up to 3.23" (82mm) of precipitation. In Portland, during the entire year, the rain falls for 176.8 days and collects up to 33.03" (839mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.5 snowfall days, in May, Portland aggregates 0.16" (4mm) of snow. In Portland, during the entire year, snow falls for 67.8 days and aggregates up to 22.01" (559mm) of snow.Daylight
In May, the average length of the day in Portland is 14h and 37min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:17 pm. On the last day of May, in Portland, sunrise is at 5:43 am and sunset at 8:47 pm EDT.
Sunshine
In Portland, the average sunshine in May is 9h.UV index
The average daily maximum UV index in May in Portland, New York, is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during May leads to these instructions:
Take necessary precautions - Protection from skin and eye injury is mandatory. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. 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 is the average May temperature in Portland?
What is the average humidity in May in Portland?
How much does it rain in Portland in May?
What is the last month it snows in Portland?
How many hours of daylight does Portland have in May?
When are sunrise and sunset in May in Portland?
How many hours of sunshine does Portland have in May?
How high is the UV index in May in Portland?
Average temperature in May
Portland, NY
- Average high temperature in May: 58.8°F
The warmest month (with the highest average high temperature) is July (74.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in May: 48.2°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in May
Portland, NY
- Average pressure in May: 29.99"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
Portland, NY
- Average wind speed in May: 9.3mph
The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in May
Portland, NY
- Average humidity in May: 82%
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is September (77%).
Average rainfall in May
Portland, NY
- Average rainfall in May: 3.23"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in May
Portland, NY
- Average rainfall days in May: 18 days
The month with the highest number of rainy days is October (19.2 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in May
Portland, NY
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (5.75").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Portland, NY
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (16 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Portland, NY
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in May
Portland, NY
- Average sunshine days in May: 10.6 days
The month with the most sunshine days is September (11.3 days).
The month with the least sunshine days is January (5.4 days).
Average UV index in May
Portland, NY
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Portland, NY
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in May
Portland, NY
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Portland, New York, USA
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