June weather forecastPortland, ME
June
Weather in June
In June, Portland preps up for the peak of summer. Temperatures increase significantly, reaching from 55°F (12.8°C) up to 64.9°F (18.3°C). Music fills the air as the city hosts various music festivals, bathing in the welcomed warmth. Despite this, don't forget to keep a brolly at all times due to occasional rainy days, typical to Portland weather patterns. The long summer days are ideal for exploring the city and its cultural offerings.Temperature
With the beginning of June, Portland's average high-temperature sees a minor increase, transitioning from a mild 57.4°F (14.1°C) in May to a comfortable 64.9°F (18.3°C). An average nighttime temperature of 55°F (12.8°C) is recorded during June.Humidity
June and July, with an average relative humidity of 82%, are the most humid months.Rainfall
In Portland, Maine, in June, during 13.2 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. In Portland, during the entire year, the rain falls for 127 days and collects up to 21.93" (557mm) of precipitation.Snowfall
In Portland, snow does not fall in May through September.Ocean temperature
In Portland, Maine, in June, the average water temperature is 54.7°F (12.6°C).Note: Swimming in 54.7°F (12.6°C) at temperatures under 50°F (10°C) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Even brief immersion at 55.4°F (13°C) feels frosty.
Daylight
The month with the longest days is June, with an average of 15h and 24min of daylight.On the first day of June, sunrise is at 5:01 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 5:03 am and sunset at 8:26 pm EDT.
Sunshine
In June, the average sunshine is 9.1h.UV index
June through August, with an average maximum UV index of 5, are months with the highest UV index in Portland. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In June, the maximum UV index of 5 transforms into these recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Portland, ME
- Average high temperature in June: 64.9°F
The warmest month (with the highest average high temperature) is July (72.5°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in June: 55°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in June
Portland, ME
- Average pressure in June: 29.91"Hg
The months with the highest atmospheric pressure are September and November (30.05"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in June
Portland, ME
- Average wind speed in June: 8.3mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest months (with the lowest average wind speed) are July and August (7.5mph).
Average humidity in June
Portland, ME
- Average humidity in June: 82%
The months with the highest relative humidity are June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in June
Portland, ME
- Average rainfall in June: 2.13"
The wettest month (with the highest rainfall) is October (2.36").
The driest month (with the least rainfall) is September (1.18").
Average rainfall days in June
Portland, ME
- Average rainfall days in June: 13.2 days
The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in June
Portland, ME
- Average snowfall in June: 0"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August and September (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).
The months with the least snowfall days are May, June, July, August and September (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: 15h and 24min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in June: 9h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in June
Portland, ME
- Average sunshine days in June: 15 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in June
Portland, ME
- Average UV index in June: 5
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in June
Portland, ME
- Average cloud cover in June: 39
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in June
Portland, ME
- Average visibility in June: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
