Quarterly Climate Impacts and Outlook for the Great Lakes Region for March - May 2021. Dated June 2021.
Spring was up to 3°C (5°F) warmer than normal. Lake temperatures were also slightly above average this spring. All basins except Superior were drier than average every month of spring, with the overall basin seeing 68% of average precipitation in March, 81% of average in April, and 62% of average in May. Spring precipitation was 70% of average.