This report describes the typical weather at the Hancock County-Bar Harbor Airport (Bar Harbor, Maine, United States) weather station over the course of an average June. It is based on the historical records from 1992 to 2012. Earlier records are either unavailable or unreliable.
Bar Harbor, Maine has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (60%), oceans and seas (33%), and lakes and rivers (6%).
The month of June is characterized by rising daily high temperatures, with daily highs increasing from 64°F to 72°F over the course of the month, exceeding 80°F or dropping below 55°F only one day in ten.
Over the course of June, the length of the day is essentially constant. The shortest day of the month is June 1 with 15:20 hours of daylight; the longest day is June 19 with 15:34 hours of daylight.
The earliest sunrise is at 4:48am on June 12; the latest sunset is at 8:23pm on June 29; the latest sunrise is at 4:53am on June 30; the earliest sunset is at 8:11pm on June 1.
Daylight saving time is observed in 2012 but it neither starts nor ends in June, so the entire month is in daylight time.
The median cloud cover ranges from 53% (partly cloudy) to 68% (partly cloudy). The trend is for the sky to be clearing rapidly with the median cloud cover decreasing by 15% from the start to the end of the month.
On June 30, the clearest day of the month, the sky is clear, mostly clear, or partly cloudy 46% of the time, and overcast or mostly cloudy 42% of the time.
On June 1, the cloudiest day of the month, the sky is overcast, mostly cloudy, or partly cloudy 50% of the time, and clear or mostly clear 38% of the time.
The average probability that some form of precipitation will be observed in a given day is 5%, with little variation over the course of the month.
Throughout June, the most common forms of precipitation are thunderstorms.
Thunderstorms are the most severe precipitation observed during 100% of those days with precipitation. They are most likely around June 29, when it is observed during 6% of all days.
Either snow is exceptionally unlikely to fall at this location in June or this station does not reliably report precipitation types.
The relative humidity typically ranges from 53% (mildly humid) to 94% (very humid) over the course of a typical June, rarely dropping below 31% (comfortable) and reaching as high as 100% (very humid).
The air is driest around June 1, at which time the relative humidity drops below 67% (mildly humid) three days out of four; it is most humid around June 30, rising above 91% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical June, the dew point typically varies from 41°F (dry) to 60°F (comfortable) and is rarely below 32°F (dry) or above 66°F (muggy).
The time of the month between June 1 and June 30 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of June typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around June 2, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around June 27, at which time the average daily maximum wind speed is 13 mph (moderate breeze).