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The dew point of a given body of air is the temperature to which it must be cooled to become saturated with water vapor. This temperature depends on the pressure and water content of the air. When the air is cooled below the dew point, its moisture capacity is reduced and airborne water vapor will condense to form liquid water known as dew. [1]
It's estimated that a frost may occur earlier than the given date 30% of the time. So use the first frost date as an estimate—it doesn't hurt to get your garden ready a bit in advance of it.
The temperature at which frost will form is called the dew point, and depends on the humidity of the air. [1] When the temperature of the air drops below its dew point, excess water vapor is forced out of solution, resulting in a phase change directly from water vapor (a gas) to ice (a solid).
Station model plots use an internationally accepted coding convention that has changed little since August 1, 1941. Elements in the plot show the key weather elements, including temperature, dew point, wind, cloud cover, air pressure, pressure tendency, and precipitation. [2] [3]
The blue numbers are the amount of precipitation in either millimeters (liters per square meter) or inches. The red numbers are the average daily high and low temperatures for each month, and the red bars represent the average daily temperature span for each month. The thin gray line is 0 °C or 32 °F, the point of freezing, for orientation.
Date Location Highest Temperature: 106 °F (41 °C) 23 August 1916 Torrington, CT [1] 15 July 1995 Danbury, CT: Lowest Temperature: −32 °F (−36 °C) 16 February 1943 Norfolk, CT “The Ice Box of CT” [1] 22 January 1961 Coventry, CT
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When temperatures are low enough, the water droplets freeze into ice particles known as frost. dew point (T d) Also dewpoint or dew-point. The temperature to which an air parcel must be cooled, at constant pressure and moisture content, in order for saturation to occur. Continued cooling below the dew point will cause condensation of water ...