Historical Degree Day Data Files

If you only need historical data periodically, our basic historical data only subscription may fulfill your needs. All of the site specific and composite data files on this page are updated once per month, usually on or around the 7th. Hourly and daily data has undergone extensive cleaning and filling procedures. Most sites are free of missing data, and most errors have been corrected. Historical data is updated with the quality controlled data from NCDC each month, and then with the final edited versions of the data (where available) a few months later. If you notice any questionable or erroneous data, please contact us.

Regular Frontier Weather subscribers may access more recent daily and hourly weather data here:
/weatherdata_daily.html

If you would like a site specific data file created for a site not listed here, let us know, and we will work to set that up for you.