Global Historical Climatology Network (GHCN)
Temperature Calculations
Temperature Calculations
For a description of the GHCN data set, visit the National Climatic Data Center's website (http://www.ncdc.noaa.gov/oa/climate/ghcn-monthly/index.php).
To calculate a trend, input a period of record, a latitude range and a longitude range. If you are unsure how and what to enter for these terms, click here. Results will be returned in approximately 10 to 20 seconds after you have entered these parameters and clicked on the "Calculate trend" button below.