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 mild 56.8°F (13.8°C) in April to an agreeable 68.2°F (20.1°C). Portland's nighttime temperature in May drops to an average of 49.8°F (9.9°C).Humidity
In May, the average relative humidity is 75%.Rainfall
In Portland, during May, the rain falls for 16.8 days and regularly aggregates up to 2.64" (67mm) of precipitation. Throughout the year, there are 162.2 rainfall days, and 34.13" (867mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Portland. May is the last month it regularly snows. During 0.2 snowfall days, in May, Portland aggregates 0.47" (12mm) of snow. Throughout the year, there are 29.4 snowfall days, and 14.76" (375mm) of snow is accumulated.Daylight
In Portland, the average length of the day in May is 14h and 32min.On the first day of the month, sunrise is at 5:46 am and sunset at 7:48 pm. On the last day of May, sunrise is at 5:18 am and sunset at 8:17 pm EDT.
Sunshine
In May, the average sunshine is 8.2h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 5 in May transforms into the following instructions:
Take necessary precautions - Suggestions to elude sunburn are provided. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take careful note! The UV radiation of the Sun can be nearly 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?
How many days does it rain in May in Portland?
What is the last month it snows?
How many hours of daylight does Portland have in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Portland have in May?
What is the UV index reading in May?
Average temperature in May
Portland, CT
- Average high temperature in May: 68.2°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).
Average pressure in May
Portland, CT
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in May
Portland, CT
- Average wind speed in May: 6.6mph
The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in May
Portland, CT
- Average humidity in May: 75%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).
Average rainfall in May
Portland, CT
- Average rainfall in May: 2.64"
The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in May
Portland, CT
- Average rainfall days in May: 16.8 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in May
Portland, CT
- Average snowfall in May: 0.47"
The month with the highest snowfall is March (4.13").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Portland, CT
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (8.3 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, CT
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in May: 8h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in May
Portland, CT
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in May
Portland, CT
- 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, November and December (UV index 2).
Average cloud cover in May
Portland, CT
- Average cloud cover in May: 48
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in May
Portland, CT
- Average visibility in May: 5mi
The months with the highest visibility are January, March, April, August, September, October, November and December (6mi).
The months with the lowest visibility are February, May, June and July (5mi).
Portland, Connecticut, USA
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