June weather forecast
Belfast, ME

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Weather in June

In June, Belfast experiences summer in its most refined form. It's a period of endurance for the locals as temperatures continue to rise following May's pattern. Daylight is predictably plentiful in June, reaching a zenith close to the summer solstice. It's worth noting that June stands out from other months owing to the absence of snowfall. Despite the heat, June's weather invigorates Belfast residents to immerse in outdoor summer activities such as barbecuing, hiking, and cycling.

Temperature

Belfast's transition into June brings a slight rise in the average high-temperature, moving from a mild 59.7°F (15.4°C) in May to a comfortable 66.7°F (19.3°C). Throughout June, the average low-temperature records at a fresh 50.7°F (10.4°C).

Humidity

In June, the average relative humidity in Belfast is 82%.

Rainfall

In Belfast, in June, it is raining for 14.8 days, with typically 2.09" (53mm) of accumulated precipitation. In Belfast, during the entire year, the rain falls for 141.1 days and collects up to 24.29" (617mm) of precipitation.

Snowfall

June through September are months without snowfall in Belfast.

Ocean temperature

In Belfast, in June, the average water temperature is 52°F (11.1°C).
Note: It is life-risking to swim in 52°F (11.1°C). Briefly staying in 55.4°F (13°C) waters feels unsettling, and temperatures below 50°F (10°C) might result in cold shock and loss of breath control, hinging on personal endurance.

Daylight

The month with the longest days is June, with an average of 15h and 30min of daylight.
On the first day of the month, sunrise is at 4:54 am and sunset at 8:13 pm. On the last day of June, in Belfast, sunrise is at 4:55 am and sunset at 8:24 pm EDT.

Sunshine

In June, the average sunshine is 8.3h.

UV index

June through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: In June, the maximum UV index of 5 suggests this advice:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
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Frequently asked questions

What are June temperatures in Belfast?

In June, in Belfast, the average high-temperature is 66.7°F (19.3°C), and the average low-temperature is 50.7°F (10.4°C).

What is the average humidity in June in Belfast?

In Belfast, the average relative humidity in June is 82%.

How much does it rain in Belfast in June?

In Belfast, in June, during 14.8 rainfall days, 2.09" (53mm) of precipitation is typically accumulated.

When it does not snow in Belfast?

June through September are months without snowfall in Belfast.

Does it snow in Belfast in June?

In June, it doesn't snow. May is the latest month when it typically snows.

How cold is the water in June in Belfast?

In Belfast, Maine, the average seawater temperature in June is 52°F (11.1°C). Swimming in 52°F (11.1°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

When are the longest days in Belfast?

June has the longest days of the year in Belfast, with an average of 15h and 30min of daylight.

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

In June, the average day length is 15h and 29min.

When is the sunrise / sunset in June in Belfast?

On the first day of June in Belfast, sunrise is at 4:54 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 4:55 am and sunset at 8:24 pm EDT.

How long on average sun shines in June in Belfast?

The average sunshine duration in June is 8.3h.

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

The months with the highest UV index are June through August, with an average maximum UV index of 5.

How high is the UV index in June in Belfast?

The average daily maximum UV index in June in Belfast is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJuneJASOND
May
June
Jul
Average high temperature
59.7°F 15.4°C
66.7°F 19.3°C
73.9°F 23.3°C
Average low temperature
43.9°F 6.6°C
50.7°F 10.4°C
57.7°F 14.3°C
Average pressure
29.99" 762mmHg
29.91" 760mmHg
29.93" 760mmHg
Average wind speed
7.6mph 12.2km/h
7mph 11.3km/h
6mph 9.7km/h
Average max. wind speed
8.2mph 13.2km/h
7.6mph 12.2km/h
6.6mph 10.6km/h
Average wind speed gusts
12mph 19.3km/h
11.2mph 18km/h
9.9mph 15.9km/h
Average humidity
80%
82%
83%
Average rainfall
2.05" 52mm
2.09" 53mm
1.46" 37mm
Average rainfall days
15.3
14.8
14.5
Average snowfall
0.35" 9mm
0" 0mm
0" 0mm
Average snowfall days
0.1
0
0
Average sea temperature
45.1°F 7.3°C
52°F 11.1°C
58.5°F 14.7°C
Average daylight
14h 5min
15h 3min
15h 1min
Average sunshine
7h 4min
8h 2min
9h 2min
Average sunshine days
13.7
13.6
14.7
Average UV index
4
5
5
Average cloud cover
51%
47%
41%
Average visibility
5mi 8km
5mi 8km
5mi 8km

Average temperature in June
Belfast, ME

Average temperature in June - Belfast, ME
  • Average high temperature in June: 66.7°F

The warmest months (with the highest average high temperature) are July and August (73.9°F).
The month with the lowest average high temperature is January (28.4°F).

  • Average low temperature in June: 50.7°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

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Average pressure in June
Belfast, ME

Average pressure in June - Belfast, ME
  • Average pressure in June: 29.91"Hg

The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in June
Belfast, ME

Average wind speed in June - Belfast, ME
  • Average wind speed in June: 7mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in June
Belfast, ME

Average humidity in June - Belfast, ME
  • Average humidity in June: 82%

The months with the highest relative humidity are February and July (83%).
The month with the lowest relative humidity is November (77%).

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Average rainfall in June
Belfast, ME

Average rainfall in June - Belfast, ME
  • Average rainfall in June: 2.09"

The wettest month (with the highest rainfall) is December (2.72").
The driest months (with the least rainfall) are July and September (1.46").

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Average rainfall days in June
Belfast, ME

Average rainfall days in June - Belfast, ME
  • Average rainfall days in June: 14.8 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is February (7.1 days).

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Average snowfall in June
Belfast, ME

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

The month with the highest snowfall is January (4.57").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in June
Belfast, ME

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

The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in June
Belfast, ME

Average sea temperature in June - Belfast, ME
  • Average sea temperature in June: 52°F

The best month for swimming (with the highest average sea temperature) is August (60.4°F).
The coldest month (with the lowest average sea temperature) is March (37.8°F).

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Average daylight in June /
Average sunshine in June
Belfast, ME

Average daylight in June / Average sunshine in June - Belfast, ME
  • Average daylight in June: 15h and 3min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in June: 8h and 2min

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average sunshine days in June
Belfast, ME

Average sunshine days in June - Belfast, ME
  • Average sunshine days in June: 13.6 days

The month with the most sunshine days is September (17.9 days).
The month with the least sunshine days is April (11.7 days).

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Average UV index in June
Belfast, ME

Average UV index in June - Belfast, 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).

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Average cloud cover in June
Belfast, ME

Average cloud cover in June - Belfast, ME
  • Average cloud cover in June: 47

The month with the most cloud cover is March (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 37).

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Average visibility in June
Belfast, ME

Average visibility in June - Belfast, ME
  • Average visibility in June: 5mi

The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).

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Belfast, Maine, USA

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