This report describes the typical weather at the Niagara Falls International Airport (Niagara Falls, New York, United States) weather station over the course of an average year. It is based on the historical records from 1993 to 2012. Earlier records are either unavailable or unreliable.
Niagara Falls, New York has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by grasslands (43%), oceans and seas (28%), forests (16%), and built-up areas (11%).
Over the course of a year, the temperature typically varies from 17°F to 82°F and is rarely below 3°F or above 88°F.
The warm season lasts from May 30 to September 19 with an average daily high temperature above 71°F. The hottest day of the year is July 23, with an average high of 82°F and low of 63°F.
The cold season lasts from December 4 to March 14 with an average daily high temperature below 40°F. The coldest day of the year is January 26, with an average low of 17°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 9:00 hours of daylight; the longest day is June 20 with 15:23 hours of daylight.
The earliest sunrise is at 5:35am on June 15 and the latest sunset is at 9:00pm on June 25. The latest sunrise is at 7:54am on November 3 and the earliest sunset is at 4:40pm on December 10.
Daylight saving 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 66% (partly cloudy) to 99% (overcast). The sky is cloudiest on January 13 and clearest on August 8. The clearer part of the year begins around April 25. The cloudier part of the year begins around October 16.
On August 8, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 49% of the time, and overcast or mostly cloudy 50% of the time.
On January 13, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 90% of the time, and clear or mostly clear 10% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around December 30, occurring in 84% of days. Precipitation is least likely around August 26, occurring in 44% 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 30% of those days with precipitation. It is most likely around May 8, when it is observed during 29% of all days.
Light snow is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around January 26, when it is observed during 50% of all days.
Thunderstorms are the most severe precipitation observed during 14% of those days with precipitation. They are most likely around July 8, when it is observed during 22% of all days.
Moderate rain is the most severe precipitation observed during 10% of those days with precipitation. It is most likely around October 12, when it is observed during 11% of all days.
During the warm season, which lasts from May 30 to September 19, there is a 48% 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 (41% of days with precipitation have at worst light rain), thunderstorms (38%), moderate rain (14%), and heavy rain (5%).
During the cold season, which lasts from December 4 to March 14, there is a 79% 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 (55% of days with precipitation have at worst light snow), moderate snow (18%), light rain (12%), and heavy snow (7%).
The likelihood of snow falling is highest around January 19, occurring in 71% of days. The season in which it is relatively likely for snow to fall spans from November 10 to April 9.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 43% (comfortable) to 95% (very humid) over the course of the year, rarely dropping below 24% (dry) and reaching as high as 100% (very humid).
The air is driest around April 28, at which time the relative humidity drops below 53% (mildly humid) three days out of four; it is most humid around August 5, 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 11°F (dry) to 67°F (muggy) and is rarely below -4°F (dry) or above 73°F (very muggy).
There are two periods in the year that are most comfortable: The first is between May 14 and July 12 and the second is between August 20 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 0 mph to 19 mph (calm to fresh breeze), rarely exceeding 28 mph (strong breeze).
The highest average wind speed of 12 mph (moderate breeze) occurs around January 10, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 8 mph (light breeze) occurs around August 9, at which time the average daily maximum wind speed is 14 mph (moderate breeze).