NOAA's National Centers for Environmental Information
Monthly maps are available from February 2001 to May 2023, weekly maps from January 4, 2020 to May 27, 2023, and daily maps from January 1, 2020 to May 30, 2023. Please note that not all products are available for all dates and timescales.
Monthly and multimonth National, Regional, Statewide, Divisional, and County products are derived from the nClimDiv-Monthly dataset for the Contiguous U.S. and Alaska. Gridded products are computed using nClimGrid-Monthly. The data are averaged or totaled for the selected timescale.
County and Gridded Temperature (Maximum, Minimum, and Average) and Precipitation are offered only for the Contiguous U.S. at the Daily, Weekly, and Month-to-Date timescales using the nClimGrid-Daily dataset. Each day the products are updated with the most recent data for the current and previous months. It typically takes 3 to 4 days to ingest and process the data before they are made available. Weekly products are for the week ending on Saturday. Month-to-date percent of normal precpitation products are made available after the first seven days of the month. The month-to-date products are replaced with the nClimGrid-Monthly product once it is made available. Departures for each time period are relative to the most recent 30-year base period (1991-2020). Areas of gray on the absolute precipitation maps represent areas where data has not been reported.