National Weather Service United States Department of Commerce

Basic Climate Data Explanation

Key to daily columns: (midnight to midnight Local Standard Time)

Observed Columns

Date - Day of month.
High Temp - Maximum temperature for the day
Low Temp - Minimum temperature for the day
Mean Temp - Average daily temperature
Pcpn - Precipitation amount for the day (liquid equivalent)
Snow Snfl - Snowfall amount for the day (includes sleet, hail, and glaze)
Snow Depth - Snow depth (taken at 1200 Universal Coordinated Time)
HDD - Heating Degree Days
CDD - Cooling Degree Days

Normals Columns

High Temp - Normal High Temperature for this date
Low Temp - Normal Low temperature for this date
Mean Temp - Normal Mean Temperature for this date
Pcpn - Normal Precipitation for this date
Snow Snfl - Normal Snowfall for this date
HDD - Normal Heating Degree Days for this date
CDD - Normal cooling degree days for this date

Miscellaneous

MTD - Month to Date...average temp, precip, etc for the Month
STD - Season to Date...average temp, precip, etc for the Season
YTD - Year to Date...average temp, precip, etc for the Year
DPT - Departure from normal (- is below normal, + is above normal)
M or MM - Data is Missing
T - A Trace of precipitation has been received