This report describes the typical weather at the Elmira/Corning Regional Airport (Big Flats, New York, United States) weather station over the course of an average year. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Big Flats, New York has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by forests (97%).
Over the course of a year, the temperature typically varies from 14°F to 82°F and is rarely below -3°F or above 90°F.
The warm season lasts from May 27 to September 16 with an average daily high temperature above 72°F. The hottest day of the year is July 24, with an average high of 82°F and low of 59°F.
The cold season lasts from December 2 to March 8 with an average daily high temperature below 41°F. The coldest day of the year is January 19, with an average low of 14°F and high of 31°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:06 hours of daylight; the longest day is June 20 with 15:17 hours of daylight.
The earliest sunrise is at 5:30am on June 12 and the latest sunset is at 8:48pm on June 29. The latest sunrise is at 7:43am on November 3 and the earliest sunset is at 4:35pm on December 10.
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 68% (partly cloudy) to 99% (overcast). The sky is cloudiest on December 19 and clearest on July 9. The clearer part of the year begins around April 20. The cloudier part of the year begins around September 26.
On July 9, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 46% of the time, and overcast or mostly cloudy 50% of the time.
On December 19, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 77% of the time, and clear or mostly clear 22% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around February 3, occurring in 72% of days. Precipitation is least likely around August 21, occurring in 41% of days.
Over the entire year, the most common forms of precipitation are light rain, light snow, moderate rain, and thunderstorms.
Light rain is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around October 15, when it is observed during 26% of all days.
Light snow is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around January 29, when it is observed during 49% of all days.
Moderate rain is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around September 27, when it is observed during 10% of all days.
Thunderstorms are the most severe precipitation observed during 10% of those days with precipitation. They are most likely around July 18, when it is observed during 16% of all days.
During the warm season, which lasts from May 27 to September 16, there is a 44% 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 rain (43% of days with precipitation have at worst light rain), thunderstorms (29%), moderate rain (19%), and heavy rain (7%).
During the cold season, which lasts from December 2 to March 8, there is a 70% 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 (63% of days with precipitation have at worst light snow), light rain (13%), and moderate snow (11%).
The likelihood of snow falling is highest around January 29, occurring in 61% of days. The season in which it is relatively likely for snow to fall spans from November 7 to April 12.
During peak snow season, accumulation at this location on a given day is just less likely than not. The chances of there being snow on the ground are highest around January 25, occurring 38% of the time. The season in which snow is relatively likely to be on the ground spans from December 4 to March 25.
The snow is typically at its deepest on March 9, with a median depth of 4.1"; the depth exceeds 15.2" only one year out of ten.
The relative humidity typically ranges from 41% (comfortable) to 97% (very humid) over the course of the year, rarely dropping below 22% (dry) and reaching as high as 100% (very humid).
The air is driest around April 27, at which time the relative humidity drops below 51% (mildly humid) three days out of four; it is most humid around August 7, exceeding 95% (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 7°F (dry) to 66°F (muggy) and is rarely below -12°F (dry) or above 72°F (very muggy).
There are two periods in the year that are most comfortable: The first is between May 14 and July 13 and the second is between August 9 and October 8. 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 23 mph (fresh breeze).
The highest average wind speed of 8 mph (gentle breeze) occurs around April 7, at which time the average daily maximum wind speed is 17 mph (moderate breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around August 5, at which time the average daily maximum wind speed is 12 mph (moderate breeze).