The Chesapeake Bay in 2020

A Year in Graphs

Weather Trends

This BayData product from the Virginia Institute of Marine Science summarizes the physical conditions that are impacting the health of the Chesapeake Bay during 2020. Mouse over any data graphic to reveal its interactive features.



See cumulative precipitation data for other Bay watershed cities below. All data are from weather stations operated by NOAA's State Climatology Network.

Williamsburg, VA
Baltimore, MD
Harrisburg, PA

Salinity in Chesapeake Bay begins 2020 at near normal levels, following a record wet year in 2018 and a "flash drought" in September and early October of 2019.

Data are from the CBIBS York Spit buoy, part of the VECOS network operated by the Chesapeake Bay National Estuarine Research Reserve at VIMS.

2020 arrived with abnormally warm temperatures, followed by a cool spring and consistently warm summer. A cool start to autumn was followed by above average warmth through the remainder of the year.


Here's how 2020 temperatures in Williamsburg compare to the normal and record highs and lows for each day.

All data are from NOAA's State Climatology Network. Williamsburg is of course just a single location, at the whims of local weather. To see how 2020 compares to previous years on a global basis, visit NOAA's Climate Prediction Center.