Preliminary Climate Summary for May of 2026: May brought wide temperature fluctuations across Minnesota, starting out the first half of the month with multiple frosts and many days with colder than normal temperatures. Frosts occurred across even southern Minnesota counties over May 5-6, but most crops were either just planted or too early in their growth to be seriously damaged. Mid-month monthly brought some summerlike temperatures, as well as some Red Flag Warnings because of very low humidity and high winds. The last week of the month brought well above normal temperatures, with many climate stations reporting high temperatures of 90°F or above. May 16th and May 25th brought daily record high temperatures to at least 20 climate stations in the state. International Falls reached a daily record high temperature of 89°F on the 25th. Overall, northern Minnesota reported mean monthly temperatures that were from 1°F to 3°F cooler than normal, while southern Minnesota climate stations rep...