While the primary use of humidity data is in computing Heat Index readings, they can be valuable in their own right. For example, household cleaners positioned for use against mold and mildew and certain pesticide products will find it useful. Monthly normals are available for both variables. Variables using other levels of precipitation are easily developed. Normal data is not available for levels of daytime precipitation.
Normal data is available for total monthly snowfall.
Data is also available showing the normal number of Snow Days in each calendar month. The net difference is expressed as either an absolute number or as a percentage of the total number of days in the period being analyzed. Two daily variables present the percentage of U.S. households that are at least 5 warmer than year-ago, and those at least 5 cooler . In this case we can construct a variable combining the number of days with a maximum temperature above or below the threshold level with the average difference versus the threshold temperature. Our database contains variables based on daily minimum temperatures that are analogous to those for daily maximum temperatures.