This report describes the typical weather at the Riga International Airport (Riga, Latvia) weather station over the course of an average July. It is based on the historical records from 1995 to 2012. Earlier records are either unavailable or unreliable.
Riga has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by croplands (43%), oceans and seas (26%), forests (15%), grasslands (10%), and built-up areas (3%).
The month of July is characterized by gradually rising daily high temperatures, with daily highs ranging from 72Â°F to 75Â°F over the course of the month, exceeding 84Â°F or dropping below 64Â°F only one day in ten.
Over the course of July, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:27 hours, implying an average day-over-day decrease of 2.8 minutes.
The shortest day of the month is July 31 with 16:16 hours of daylight; the longest day is July 1 with 17:43 hours of daylight.
The earliest sunrise is at 4:36am on July 1; the latest sunset is at 10:20pm on July 2; the latest sunrise is at 5:21am on July 31; the earliest sunset is at 9:37pm on July 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in July, so the entire month is in daylight time.
The median cloud cover is 88% (mostly cloudy) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 4% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 42% of the time.
The average probability that some form of precipitation will be observed in a given day is 50%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are thunderstorms, light rain, and moderate rain.
Thunderstorms are the most severe precipitation observed during 49% of those days with precipitation. They are most likely around July 10, when it is observed during 25% of all days.
Light rain is the most severe precipitation observed during 38% of those days with precipitation. It is most likely around July 4, when it is observed during 20% of all days.
Moderate rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around July 26, when it is observed during 7% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 54% (mildly humid) to 96% (very humid) over the course of a typical July, rarely dropping below 39% (comfortable) and reaching as high as 100% (very humid).
The air is driest around July 10, at which time the relative humidity drops below 60% (mildly humid) three days out of four; it is most humid around July 30, rising above 94% (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 July, the dew point typically varies from 51Â°F (very comfortable) to 62Â°F (mildy humid) and is rarely below 45Â°F (dry) or above 68Â°F (muggy).
The time of the month between July 1 and July 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of July typical wind speeds vary from 0 mph to 13 mph (calm to moderate breeze), rarely exceeding 18 mph (moderate breeze).
The highest average wind speed of 7 mph (light breeze) occurs around July 1, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around July 27, at which time the average daily maximum wind speed is 12 mph (gentle breeze).