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 brings an increase in the average high-temperature, progressing from a refreshing 56.8°F (13.8°C) in April to an agreeable 68.5°F (20.3°C). In May, the average low-temperature in Portland records at a frosty 49.1°F (9.5°C) during the nights.Humidity
The average relative humidity in May is 79%.Rainfall
In Portland, during May, the rain falls for 15.5 days and regularly aggregates up to 2.32" (59mm) of precipitation. Throughout the year, there are 135.7 rainfall days, and 23.74" (603mm) of precipitation is accumulated.Snowfall
Months with snowfall in Portland are January through May, October through December. May is the last month it regularly snows in Portland, Pennsylvania. During 0.3 snowfall days, in May, Portland aggregates 0.47" (12mm) of snow. Throughout the year, in Portland, there are 33.7 snowfall days, and 16.65" (423mm) of snow is accumulated.Daylight
The average length of the day in May in Portland, Pennsylvania, is 14h and 29min.On the first day of the month, sunrise is at 5:57 am and sunset at 7:57 pm. On the last day of May, in Portland, Pennsylvania, sunrise is at 5:30 am and sunset at 8:25 pm EDT.
Sunshine
In Portland, Pennsylvania, the average sunshine in May is 8.1h.UV index
In Portland, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 5 in May translates into these instructions:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
What is the usual temperature for Portland in May?
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?
What is the average length of the day in May in Portland?
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, PA
- Average high temperature in May: 68.5°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.9°F).
- Average low temperature in May: 49.1°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in May
Portland, PA
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in May
Portland, PA
- Average wind speed in May: 6.2mph
The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in May
Portland, PA
- Average humidity in May: 79%
The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Portland, PA
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is July (2.48").
The driest month (with the least rainfall) is September (1.22").
Average rainfall days in May
Portland, PA
- Average rainfall days in May: 15.5 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in May
Portland, PA
- Average snowfall in May: 0.47"
The month with the highest snowfall is March (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Portland, PA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Portland, PA
- 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 18min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in May
Portland, PA
- Average sunshine days in May: 13.8 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in May
Portland, PA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Portland, PA
- Average cloud cover in May: 50
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in May
Portland, PA
- Average visibility in May: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Portland, Pennsylvania, USA
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