This report describes the typical weather at the Ohio State University Airport (Columbus, Ohio, United States) weather station over the course of an average year. It is based on the historical records from 1983 to 2012. Earlier records are either unavailable or unreliable.
Columbus, Ohio has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by croplands (84%), built-up areas (8%), and grasslands (7%).
Over the course of a year, the temperature typically varies from 21°F to 84°F and is rarely below 5°F or above 91°F.
The warm season lasts from May 27 to September 20 with an average daily high temperature above 74°F. The hottest day of the year is July 14, with an average high of 84°F and low of 65°F.
The cold season lasts from November 30 to March 5 with an average daily high temperature below 44°F. The coldest day of the year is January 24, with an average low of 21°F and high of 34°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:20 hours of daylight; the longest day is June 20 with 15:02 hours of daylight.
The earliest sunrise is at 6:02am on June 12 and the latest sunset is at 9:06pm on June 29. The latest sunrise is at 8:04am on November 3 and the earliest sunset is at 5:06pm on December 9.
Daylight savings time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 29% (mostly clear) to 96% (overcast). The sky is cloudiest on January 3 and clearest on August 26. The clearer part of the year begins around April 10. The cloudier part of the year begins around November 6.
On August 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 51% of the time, and overcast or mostly cloudy 32% of the time.
On January 3, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 59% of the time, and clear or mostly clear 25% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around January 5, occurring in 62% of days. Precipitation is least likely around September 12, occurring in 38% of days.
Over the entire year, the most common forms of precipitation are light rain, light snow, thunderstorms, and moderate rain.
Light rain is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around April 25, when it is observed during 25% of all days.
Light snow is the most severe precipitation observed during 21% of those days with precipitation. It is most likely around January 15, when it is observed during 32% 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 21% of all days.
Moderate rain is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around November 14, when it is observed during 10% of all days.
During the warm season, which lasts from May 27 to September 20, there is a 43% 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 (43% of days with precipitation have at worst thunderstorms), light rain (34%), moderate rain (17%), and heavy rain (5%).
During the cold season, which lasts from November 30 to March 5, there is a 59% 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 (47% of days with precipitation have at worst light snow), light rain (23%), moderate rain (10%), and moderate snow (10%).
The likelihood of snow falling is highest around January 15, occurring in 40% of days. The season in which it is relatively likely for snow to fall spans from November 14 to April 3.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 46% (comfortable) to 95% (very humid) over the course of the year, rarely dropping below 28% (dry) and reaching as high as 100% (very humid).
The air is driest around April 20, at which time the relative humidity drops below 56% (mildly humid) three days out of four; it is most humid around August 20, exceeding 92% (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 15°F (dry) to 69°F (muggy) and is rarely below -1°F (dry) or above 75°F (very muggy).
There are two periods in the year that are most comfortable: The first is between April 28 and June 18 and the second is between August 29 and October 15. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 0 mph to 17 mph (calm to moderate breeze), rarely exceeding 24 mph (strong breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around March 29, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around August 9, at which time the average daily maximum wind speed is 12 mph (moderate breeze).