Historical Climate Trends

Created: 10/16/2017 - Updated: 2/27/2020


The Historical Climate Trends product provides a comparative seasonal or annual analysis for a specified climate division or state. Long term averages are taken from NCDC's monthly and annual temperature and rainfall datasets. These long term averages are depicted in each chart as a horizontal line in the middle of the chart. 5-year moving averages of seasonal (or annual) values are plotted in comparison to the long-term average as red or blue curves for temperature and green or brown curves for precipitation. When looking at the temperature graphs, a red curve indicates a warmer period than the historical average, while a blue curve is a period that is cooler than the historical average. On the precipitation graphs, a green curve indicates a period that is wetter than the historical average, while a brown curve is drier than the historical average.


The Southern Climate Impacts Planning Program (SCIPP) is a new, southern United States focused climate hazards preparedness program which aims to bridge the gap between climate science and local-level climate hazard planning processes.

Focusing on the six-state region of Oklahoma, Texas, Louisiana, Arkansas, Tennessee, and Mississippi, SCIPP investigates major climate hazards of the region and actively engages community-level decision makers to: