Portland
Maine, USA
Long-term weather forecast
Long-term weather forecast

June weather forecast and climate
Portland, ME

Dusk view of the lit skyscrapers of the Portland city in Maine
Dusk view of the lit skyscrapers of the Portland city in Maine
The first month of the summer, June, is an agreeable month in Portland, Maine, with average temperature fluctuating between 53.6°F (12°C) and 73.2°F (22.9°C).

Temperature

In June, the average high-temperature increases, from a comfortable 63.5°F (17.5°C) in May, to a pleasant 73.2°F (22.9°C). In Portland, Maine, in June, the average low-temperature is 53.6°F (12°C).

Humidity

The average relative humidity in Portland, Maine, is 74.7%.

Rainfall

In Portland, in June, it is raining for 11.8 days, with typically 3.8" (96.3mm) of accumulated precipitation. In Portland, during the entire year, the rain falls for 130.9 days and collects up to 47.3" (1200.3mm) of precipitation.

Snowfall

Throughout the year, 61.9" (1572.3mm) of snow is accumulated.

Ocean temperature

In Portland, the average seawater temperature is 54.7°F (12.6°C). Swimming in 54.7°F (12.6°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The month with the longest days in Portland is June, with an average of 15.4h of daylight.

Sunshine

In Portland, the average sunshine is 8.6h.

UV index

Months with the highest UV index are June and July, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high threat to health from unsafe exposure to the UV radiation for average individuals.
The average daily UV index of 8 transform into the following instructions:
Take extra precautions. Protection against sun damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in June in Portland?

In June, in Portland, the average high-temperature is 73.2°F (22.9°C), and the average low-temperature is 53.6°F (12°C).

What is the average humidity in June in Portland?

The average relative humidity in June is 74.7%.

How much does it rain in Portland in June?

In June, the rain falls for 11.8 days. Throughout June, 3.8" (96.3mm) of precipitation is accumulated.

What is the water temperature in June in Portland?

In Portland, the average seawater temperature in June is 54.7°F (12.6°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

When are the longest days in Portland?

June has the longest days of the year in Portland, Maine, with an average of 15.4h of daylight.

What is the average length of the day in June in Portland?

In June, the average length of the day in Portland is 15.4h.

How long on average sun shines in June in Portland?

In June, the average sunshine is 8.6h.

What are the months with the highest UV index in Portland?

Months with the highest UV index are June and July, with an average maximum UV index of 8.

What is the UV index intensity in June in Portland?

In Portland, Maine, the average daily maximum UV index in June is 8. A UV Index of 8 to 10 symbolizes a very high hazard to health from unprotected exposure to the UV radiation.
Average temperature in June - Portland, ME
  • Average high temperature in June: 73.2°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (31.2°F).

  • Average low temperature in June: 53.6°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (13.4°F).

Average humidity in June - Portland, ME
  • Average humidity in June: 74.7%

The month with the highest relative humidity is September (76.7%).
The month with the lowest relative humidity is February (65.2%).

Average rainfall in June - Portland, ME
  • Average rainfall in June: 3.8"

Wettest months (with the highest rainfall) are October and November (4.9").
The driest month (with the lowest rainfall) is August (3.1").

Average rainfall days in June - Portland, ME
  • Average rainfall days in June: 11.8 days

The month with the highest number of rainy days is May (12.6 days).
The month with the lowest number of rainy days is September (9.2 days).

Average snowfall in June - Portland, ME
  • Average snowfall in June: 0"

The month with the highest snowfall is January (19.2").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in June - Portland, ME
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is January (7.9 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in June - Portland, ME
  • Average sea temperature in June: 54.6°F

The best month for swimming (with the highest average sea temperature) is August (63.7°F).
The coldest month (with the lowest average sea temperature) is March (38°F).

Average daylight in June / Average sunshine in June - Portland, ME
  • Average daylight in June: 15.4h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in June: 8.6h

The month with most sunshine is July (Average sunshine: 9.1h).
The month with least sunshine is December (Average sunshine: 4.5h).

Average UV index in June - Portland, ME
  • Average UV index in June: 8

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).