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.
Explore interactive visualizations regarding temperature and barometric pressure.