Jefferson’s records provide opportunities to explore questions of what weather was like as human experience. He generally tried, for example, to make an abbreviated notation of what the sky conditions were like at each observation: was it fair or cloudy? At times he noted the general conditions even if he wasn’t able to get a temperature reading. He made additional notes to record phenomena such as ice, frost, fog, flooding, and thunder, sometimes briefly indicating the effects of such conditions on transportation, agriculture, or the economy. His records also contain pieces of information relating his observations to weather events of a regional scale. See below for tools and additional information to investigate these topics as well as interactive compilations of some of the numerical data in Jefferson’s records.




Weather Conditions

Use the icons below (which are arranged by frequency of occurrence) to explore entries in Jefferson's weather records in which he noted particular conditions.

Weather Events

Jefferson’s weather notes can provide information about storms or other meteorological events for which there is evidence in other sources as well. For some of those cases, we will add to the story here.

Interactive Visualizations

Explore interactive visualizations regarding temperature and barometric pressure.