| The dew point is a measure of the humidity given | | | | lower after the front goes through. |
| in terms of temperature at which dew will start | | | | Some things that you can tell by looking at the |
| to form. Dew is formed from water droplets by | | | | temperature and its measure of humidity are if |
| condensation. Dew is present most nights when it | | | | fog will form overnight. If the two are only 4 or 5 |
| is clear with calm winds in the warmer months. | | | | degrees Fahrenheit apart in the late afternoon |
| When water vapor changes to a liquid or indirectly | | | | then fog can become likely if there is no wind and |
| in to ice, it releases latent heat and warms the air | | | | it is clear. If the air temperature is in the upper |
| slightly. Overnight when the air temperature | | | | 80's during the day and the dew point is in the |
| begins to cool towards the air temperatures | | | | lower 70's and there are no approaching weather |
| measure of humidity, condensation slows the | | | | systems then this can be an indicator of what the |
| temperature fall. From this natural phenomena the | | | | nightly low temperature will be. In the above |
| air temperature normally will not go lower that | | | | mentioned instance, the low will be near the dew |
| the dew point. | | | | point in the lower 70's with near 100% humidity |
| Some exceptions to this rule include the arrival of | | | | making it a very muggy night. |
| a new cold front that will usher in colder and drier | | | | References were taken from The Weather Book |
| air. In this instance the temperature would go | | | | by Jack Williams. |