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
As Portland transitions into May, the average high-temperature is observed to rise from a fresh 53.8°F (12.1°C) in April to an enjoyable 66.6°F (19.2°C). In the month of May, the average low-temperature in Portland usually rests at a frosty 48.6°F (9.2°C).Humidity
The average relative humidity in May is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 14.5 days and typically aggregates up to 1.77" (45mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Portland. May is the last month it regularly snows in Portland. During 0.3 snowfall days, in May, Portland aggregates 0.04" (1mm) of snow. Throughout the year, in Portland, there are 54.5 snowfall days, and 7.8" (198mm) of snow is accumulated.Daylight
In Portland, Michigan, the average length of the day in May is 14h and 40min.On the first day of May in Portland, sunrise is at 6:32 am and sunset at 8:40 pm. On the last day of the month, sunrise is at 6:03 am and sunset at 9:11 pm EDT.
Sunshine
The average sunshine in May in Portland, Michigan, is 8.4h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index in Portland. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 5 during May leads to these advisories:
Put precautions into practice - Guidance to elude sunburn is provided. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Portland?
What is the average humidity in May in Portland?
What is the rainiest month 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 is the sunrise / sunset in May in Portland?
How many hours of sunshine does Portland have in May?
What is the month with the highest UV index in Portland?
What is the UV index reading in May in Portland?
Average temperature in May
Portland, MI
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in May: 48.6°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in May
Portland, MI
- Average pressure in May: 29.98"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Portland, MI
- Average wind speed in May: 8.6mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in May
Portland, MI
- Average humidity in May: 79%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in May
Portland, MI
- Average rainfall in May: 1.77"
The wettest month (with the highest rainfall) is May (1.77").
The driest months (with the least rainfall) are February and November (0.63").
Average rainfall days in May
Portland, MI
- Average rainfall days in May: 14.5 days
The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in May
Portland, MI
- Average snowfall in May: 0.04"
The month with the highest snowfall is December (2.05").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Portland, MI
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (15.2 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, MI
- 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in May
Portland, MI
- Average sunshine days in May: 13.7 days
The month with the most sunshine days is September (17.8 days).
The month with the least sunshine days is February (13.2 days).
Average UV index in May
Portland, MI
- 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, November and December (UV index 1).
Average cloud cover in May
Portland, MI
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in May
Portland, MI
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Portland, Michigan, USA
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