May weather forecast and climate
Minnesota, USA

May is the peak of the spring in Minnesota with the first really warm days of the season. The bright sunshine lasts for 7 hours during the day, and the nights are mild at the least. A moderate rainfall of 3" (76mm) keeps the rain jacket business profitable, particularly in the southern portion of the state.
The average high temperatures are in the pleasant 56°F (13.3°C) to 72°F (22.2°C) range, while the nights are above freezing in the 38°F (3.3°C) to 50°F (10°C) zone. Winona in the south registers between 50°F (10°C) to 72°F (22.2°C), while Hibbing in the northeast is between 36°F (2.2°C) to 65°F (18.3°C). May experiences occasional floods with the thawing of the snow and heavy bouts of rain.
Polar air frequently invades the north to set aside any ideas of putting back warm jackets in the closet. The pollen is in the air with the blooming of flowers amid hay fever outbreaks. The ground is green after the melting of snow, and the fresh air lightens the spirits. Watch out for thunderstorms and rain in May in Minnesota.