This report describes the typical weather at the Windsor Airport (Windsor, Ontario, Canada) weather station over the course of an average year. It is based on the historical records from 1977 to 2012. Earlier records are either unavailable or unreliable.
Windsor, Ontario has a humid continental climate with hot summers and no dry season. The area within 25 mi of this station is covered by built-up areas (31%), croplands (30%), lakes and rivers (20%), grasslands (10%), and oceans and seas (8%).
Over the course of a year, the temperature typically varies from 18°F to 82°F and is rarely below 4°F or above 90°F.
The warm season lasts from May 27 to September 18 with an average daily high temperature above 72°F. The hottest day of the year is July 14, with an average high of 82°F and low of 66°F.
The cold season lasts from December 1 to March 10 with an average daily high temperature below 41°F. The coldest day of the year is January 26, with an average low of 18°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 9:06 hours of daylight; the longest day is June 20 with 15:17 hours of daylight.
The earliest sunrise is at 5:54am on June 16 and the latest sunset is at 9:13pm on June 24. The latest sunrise is at 8:08am on November 3 and the earliest sunset is at 4:59pm on December 6.
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 64% (partly cloudy) to 97% (overcast). The sky is cloudiest on December 25 and clearest on August 5. The clearer part of the year begins around May 17. The cloudier part of the year begins around October 20.
On August 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 49% of the time, and overcast or mostly cloudy 48% of the time.
On December 25, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 76% of the time, and clear or mostly clear 21% 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 76% of days. Precipitation is least likely around August 26, occurring in 43% 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 27% of those days with precipitation. It is most likely around October 20, when it is observed during 22% of all days.
Light snow is the most severe precipitation observed during 26% of those days with precipitation. It is most likely around January 15, when it is observed during 44% of all days.
Moderate rain is the most severe precipitation observed during 20% of those days with precipitation. It is most likely around May 4, when it is observed during 15% of all days.
Thunderstorms are the most severe precipitation observed during 14% of those days with precipitation. They are most likely around July 19, when it is observed during 19% of all days.
During the warm season, which lasts from May 27 to September 18, 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 (36% of days with precipitation have at worst light rain), thunderstorms (35%), and moderate rain (26%).
During the cold season, which lasts from December 1 to March 10, there is a 71% 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 (54% of days with precipitation have at worst light snow), moderate snow (18%), moderate rain (10%), and light rain (10%).
The likelihood of snow falling is highest around January 15, occurring in 62% of days. The season in which it is relatively likely for snow to fall spans from November 10 to April 5.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 43% (comfortable) to 91% (very humid) over the course of the year, rarely dropping below 27% (dry) and reaching as high as 100% (very humid).
The air is driest around May 1, at which time the relative humidity drops below 51% (mildly humid) three days out of four; it is most humid around August 30, exceeding 88% (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 -5°F (dry) or above 74°F (very muggy).
There are two periods in the year that are most comfortable: The first is between May 10 and July 10 and the second is between August 20 and October 9. 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 18 mph (calm to fresh breeze), rarely exceeding 27 mph (strong breeze).
The highest average wind speed of 12 mph (gentle breeze) occurs around January 12, at which time the average daily maximum wind speed is 18 mph (fresh breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around August 9, at which time the average daily maximum wind speed is 13 mph (moderate breeze).