National Weather Service Forecast for: Mankato MN
Issued by: National Weather Service Twin Cities/Chanhassen, MN
Updated: 2:26 am CDT Jun 30, 2026
 
Overnight

Overnight: Showers and thunderstorms, mainly after 4am. Low around 75. South southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
T-storms

 Tuesday

Tuesday: Showers and thunderstorms before 7am. High near 91. Heat index values as high as 99. Southwest wind 5 to 15 mph. Chance of precipitation is 80%.
T-storms then
Mostly Sunny

 Tuesday
Night
Tuesday Night: A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 72. Southwest wind 5 to 10 mph becoming south southeast after midnight.
Mostly Clear
then Chance
T-storms
 Wednesday

Wednesday: Showers and thunderstorms likely before noon, then showers likely and possibly a thunderstorm between noon and 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 87. South southwest wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Showers
Likely

 Wednesday
Night
Wednesday Night: Showers likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 68. West wind 5 to 10 mph becoming light southwest after midnight. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Showers
Likely

 Thursday

Thursday: Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Mostly Sunny

 Thursday
Night
Thursday Night: Showers and possibly a thunderstorm. Low around 71. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers

 Friday

Friday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind around 5 mph.
Chance
T-storms

 Friday
Night
Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 71. Northeast wind around 5 mph becoming east southeast in the evening. Chance of precipitation is 60%.
Chance
T-storms then
Showers
Likely
Lo 75 °F Hi 91 °F Lo 72 °F Hi 87 °F Lo 68 °F Hi 92 °F Lo 71 °F Hi 91 °F Lo 71 °F

Hazardous Weather Outlook
Heat Advisory
Severe Thunderstorm Watch
 

Overnight
 
 Showers and thunderstorms, mainly after 4am. Low around 75. South southwest wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
 
 Showers and thunderstorms before 7am. High near 91. Heat index values as high as 99. Southwest wind 5 to 15 mph. Chance of precipitation is 80%.
Tuesday Night
 
 A 30 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 72. Southwest wind 5 to 10 mph becoming south southeast after midnight.
Wednesday
 
 Showers and thunderstorms likely before noon, then showers likely and possibly a thunderstorm between noon and 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 87. South southwest wind 5 to 15 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
 
 Showers likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 68. West wind 5 to 10 mph becoming light southwest after midnight. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
 
 Mostly sunny, with a high near 92. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
 
 Showers and possibly a thunderstorm. Low around 71. South wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91. South southwest wind around 5 mph.
Friday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 71. Northeast wind around 5 mph becoming east southeast in the evening. Chance of precipitation is 60%.
Independence Day
 
 A 40 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 89. East wind around 10 mph.
Saturday Night
 
 Showers and thunderstorms likely. Partly cloudy, with a low around 68. Northeast wind 5 to 10 mph becoming southeast after midnight. Chance of precipitation is 60%.
Sunday
 
 A 30 percent chance of showers. Partly sunny, with a high near 86. Northeast wind around 5 mph.
Sunday Night
 
 A 20 percent chance of showers. Partly cloudy, with a low around 66. North northeast wind around 5 mph becoming calm in the evening.
Monday
 
 Mostly sunny, with a high near 87. East southeast wind around 5 mph.

 

Forecast from NOAA-NWS for Mankato MN.