Average Daily Dewpoint:

Dewpoint is the temperature at which air becomes saturated and produces dew. A high dewpoint temperature is indicative of moist warm air. A low dewpoint temperature indicates relatively dry conditions in either a cold or warm air mass. Prior to the extensive use of weather balloons, satellite imagery, Doppler weather radar and other modern remote sensing techniques, the surface dewpoint was the only method to track moisture movements across an area prior to precipitation occurring. Hence dewpoint was historically one of the first methods to track monsoon surface moisture movements into the Southwest. Additionally an increase in surface moisture rapidly degrades the efficiently of evaporative coolers, and is immediately noticeable for those without refrigeration air conditioning.