This report describes the typical weather at the Stockholm-Bromma Airport (Stockholm, Sweden) weather station over the course of an average June. It is based on the historical records from 1986 to 2012. Earlier records are either unavailable or unreliable.
Stockholm 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%), lakes and rivers (15%), oceans and seas (13%), and built-up areas (12%).
The month of June is characterized by rising daily high temperatures, with daily highs increasing from 64°F to 70°F over the course of the month, exceeding 79°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 18:06 hours of daylight; the longest day is June 21 with 18:40 hours of daylight.
The earliest sunrise is at 3:30am on June 18; the latest sunset is at 10:10pm on June 23; the latest sunrise is at 3:43am on June 1; the earliest sunset is at 9:49pm on June 1.
Daylight savings 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 is 61% (partly cloudy) and does not vary substantially over the course of the month.
On June 15, a representative day, the sky is clear or mostly clear 20% of the time, partly cloudy 23% of the time, and mostly cloudy or overcast 24% of the time.
The average probability that some form of precipitation will be observed in a given day is 47%, with little variation over the course of the month.
Throughout June, the most common forms of precipitation are moderate rain, light rain, and thunderstorms.
Moderate rain is the most severe precipitation observed during 47% of those days with precipitation. It is most likely around June 24, when it is observed during 23% of all days.
Light rain is the most severe precipitation observed during 27% of those days with precipitation. It is most likely around June 6, when it is observed during 13% of all days.
Thunderstorms are the most severe precipitation observed during 16% of those days with precipitation. They are most likely around June 30, when it is observed during 9% 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 44% (comfortable) to 92% (very humid) over the course of a typical June, rarely dropping below 26% (dry) and reaching as high as 100% (very humid).
The air is driest around June 1, at which time the relative humidity drops below 53% (mildly humid) three days out of four; it is most humid around June 23, rising above 88% (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 37°F (dry) to 55°F (very comfortable) and is rarely below 28°F (dry) or above 61°F (comfortable).
The time of the month between June 9 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 1 mph to 13 mph (light air to moderate breeze), rarely exceeding 17 mph (moderate breeze).
The highest average wind speed of 7 mph (light breeze) occurs around June 13, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around June 30, at which time the average daily maximum wind speed is 12 mph (moderate breeze).