This report describes the typical weather at the Rostov-on-Don Airport (Rostov-on-Don, Russian Federation) weather station over the course of an average year. It is based on the historical records from 1998 to 2012. Earlier records are either unavailable or unreliable.
Rostov-on-Don has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by croplands (93%) and built-up areas (2%).
Over the course of a year, the temperature typically varies from 20°F to 89°F and is rarely below 4°F or above 98°F.
The warm season lasts from May 29 to September 8 with an average daily high temperature above 77°F. The hottest day of the year is July 29, with an average high of 89°F and low of 68°F.
The cold season lasts from November 20 to March 8 with an average daily high temperature below 42°F. The coldest day of the year is January 29, with an average low of 20°F and high of 30°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 8:29 hours of daylight; the longest day is June 20 with 15:56 hours of daylight.
The earliest sunrise is at 5:23am on June 16 and the latest sunset is at 9:22pm on June 25. The latest sunrise is at 9:08am on January 4 and the earliest sunset is at 5:30pm on December 11.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover ranges from 80% (partly cloudy) to 99% (overcast). The sky is cloudiest on January 1 and clearest on August 1. The clearer part of the year begins around May 6. The cloudier part of the year begins around October 1.
On August 1, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 17% of the time, and overcast or mostly cloudy 29% of the time.
On January 1, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 75% of the time, and clear or mostly clear 2% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around January 11, occurring in 71% of days. Precipitation is least likely around September 3, occurring in 33% of days.
Over the entire year, the most common forms of precipitation are light rain, thunderstorms, light snow, and moderate snow.
Light rain is the most severe precipitation observed during 41% of those days with precipitation. It is most likely around April 13, when it is observed during 34% of all days.
Thunderstorms are the most severe precipitation observed during 19% of those days with precipitation. They are most likely around June 23, when it is observed during 28% of all days.
Light snow is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around January 30, when it is observed during 25% of all days.
Moderate snow is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around January 16, when it is observed during 21% of all days.
During the warm season, which lasts from May 29 to September 8, there is a 40% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (62% of days with precipitation have at worst thunderstorms) and light rain (36%).
During the cold season, which lasts from November 20 to March 8, there is a 68% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light snow (29% of days with precipitation have at worst light snow), light rain (26%), moderate snow (26%), and drizzle (8%).
The likelihood of snow falling is highest around January 30, occurring in 49% of days. The season in which it is relatively likely for snow to fall spans from November 13 to March 31.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 38% (comfortable) to 96% (very humid) over the course of the year, rarely dropping below 23% (dry) and reaching as high as 100% (very humid).
The air is driest around August 10, at which time the relative humidity drops below 43% (comfortable) three days out of four; it is most humid around December 27, exceeding 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 year, the dew point typically varies from 16°F (dry) to 66°F (muggy) and is rarely below -2°F (dry) or above 72°F (very muggy).
There are two periods in the year that are most comfortable: The first is between May 6 and July 18 and the second is between July 30 and October 11. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 2 mph to 15 mph (light air to moderate breeze), rarely exceeding 25 mph (strong breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around January 31, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around August 24, at which time the average daily maximum wind speed is 10 mph (gentle breeze).