May weather forecast
Portage, ME

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Weather in May

May, the last month of the spring in Portage, is a mild month, with an average temperature fluctuating between 40.8°F (4.9°C) and 60.1°F (15.6°C).

Temperature

Witnessing a clear upsurge, the average high-temperature during May escalates from April's chilly 43.9°F (6.6°C) to a moderate 60.1°F (15.6°C). Portage in May experiences a low-temperature average of 40.8°F (4.9°C).

Humidity

May is the least humid month, with an average relative humidity of 75%.

Rainfall

In Portage, in May, during 17.3 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, in Portage, Maine, there are 144.3 rainfall days, and 32.13" (816mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Portage are January through May, October through December. May is the last month it regularly snows in Portage. During 0.9 snowfall days, in May, Portage aggregates 0.63" (16mm) of snow. In Portage, during the entire year, snow falls for 98.7 days and aggregates up to 69.17" (1757mm) of snow.

Daylight

In Portage, the average length of the day in May is 15h and 4min.
On the first day of May in Portage, sunrise is at 5:17 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 4:43 am and sunset at 8:19 pm EDT.

Sunshine

In Portage, the average sunshine in May is 7.4h.

UV index

The average daily maximum UV index in May in Portage is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 4 during May translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
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Frequently asked questions

What are the temperatures in Portage in May?

The average high-temperature, in May, in Portage, is 60.1°F (15.6°C), while the average low-temperature is 40.8°F (4.9°C).

What is the least humid month in Portage?

The least humid month is May, with an average relative humidity of 75%.

What is the average humidity in May in Portage?

In Portage, the average relative humidity in May is 75%.

How many days does it rain in May in Portage?

In Portage, during May, the rain falls for 17.3 days and regularly aggregates up to 2.72" (69mm) of precipitation.

What is the last month it snows in Portage?

May is the last month it regularly snows in Portage. During 0.9 snowfall days, in May, Portage aggregates 0.63" (16mm) of snow.

What is the average length of the day in May in Portage?

In May, the average day length is 15h and 4min.

When are sunrise and sunset in May in Portage?

On the first day of May in Portage, sunrise is at 5:17 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 4:43 am and sunset at 8:19 pm EDT.

How many hours of sunshine does Portage have in May?

The average sunshine duration in May in Portage is 7.4h.

What is the UV index intensity in May in Portage?

In May, the average daily maximum UV index in Portage, Maine, is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Portage, ME

Average temperature in May - Portage, ME
  • Average high temperature in May: 60.1°F

The warmest month (with the highest average high temperature) is July (75.2°F).
The month with the lowest average high temperature is January (19.8°F).

  • Average low temperature in May: 40.8°F

The month with the highest average low temperature is July (54.9°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).

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Average pressure in May
Portage, ME

Average pressure in May - Portage, ME
  • Average pressure in May: 29.97"Hg

The month with the highest atmospheric pressure is September (30.02"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in May
Portage, ME

Average wind speed in May - Portage, ME
  • Average wind speed in May: 7.8mph

The windiest months (with the highest average wind speed) are January, February and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

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Average humidity in May
Portage, ME

Average humidity in May - Portage, ME
  • Average humidity in May: 75%

The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is May (75%).

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Average rainfall in May
Portage, ME

Average rainfall in May - Portage, ME
  • Average rainfall in May: 2.72"

The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is February (2.2").

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Average rainfall days in May
Portage, ME

Average rainfall days in May - Portage, ME
  • Average rainfall days in May: 17.3 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall in May
Portage, ME

Average snowfall in May - Portage, ME
  • Average snowfall in May: 0.63"

The month with the highest snowfall is January (15.2").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Portage, ME

Average snowfall days in May - Portage, ME
  • Average snowfall days in May: 0.9 days

The month with the highest number of snowfall days is February (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Portage, ME

Average daylight in May / Average sunshine in May - Portage, ME
  • Average daylight in May: 15h and 1min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in May: 7h and 2min

The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 6min).

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Average sunshine days in May
Portage, ME

Average sunshine days in May - Portage, ME
  • Average sunshine days in May: 11.9 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is February (7.9 days).

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Average UV index in May
Portage, ME

Average UV index in May - Portage, ME
  • Average UV index in May: 4

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in May
Portage, ME

Average cloud cover in May - Portage, ME
  • Average cloud cover in May: 54

The month with the most cloud cover is February (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 43).

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Average visibility in May
Portage, ME

Average visibility in May - Portage, ME
  • Average visibility in May: 5mi

The months with the highest visibility are May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March, April and December (4mi).

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Portage, Maine, USA

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