National Weather Service Forecast for: Appleton WI
Issued by: National Weather Service Green Bay, WI
Updated: 10:51 pm CDT Jun 29, 2026
 
Tonight

Tonight: Mostly cloudy, with a low around 77. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Mostly Cloudy

 Tuesday

Tuesday: A 10 percent chance of showers before 7am. Mostly sunny and hot, with a high near 95. Heat index values as high as 107. South southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Slight Chance
Showers then
Sunny
 Tuesday
Night
Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly between 1am and 5am. Partly cloudy, with a low around 76. Southwest wind 7 to 11 mph, with gusts as high as 23 mph.
Slight Chance
T-storms then
Chance
Showers
 Wednesday

Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 93. Heat index values as high as 101. South southwest wind 6 to 13 mph, with gusts as high as 23 mph.
Chance
Showers then
Chance
T-storms
 Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 75. South southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Chance
T-storms then
Showers
Likely
 Thursday

Thursday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 60%.
Slight Chance
T-storms then
Showers
Likely
 Thursday
Night
Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Showers
Likely

 Friday

Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 60%.
Chance
T-storms then
Showers
Likely
 Friday
Night
Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Chance of precipitation is 60%.
Showers
Likely
Lo 77 °F Hi 95 °F Lo 76 °F Hi 93 °F Lo 75 °F Hi 92 °F Lo 71 °F Hi 87 °F Lo 69 °F

Hazardous Weather Outlook
Extreme Heat Warning
 

Tonight
 
 Mostly cloudy, with a low around 77. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Tuesday
 
 A 10 percent chance of showers before 7am. Mostly sunny and hot, with a high near 95. Heat index values as high as 107. South southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
 
 A 40 percent chance of showers and thunderstorms, mainly between 1am and 5am. Partly cloudy, with a low around 76. Southwest wind 7 to 11 mph, with gusts as high as 23 mph.
Wednesday
 
 A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 93. Heat index values as high as 101. South southwest wind 6 to 13 mph, with gusts as high as 23 mph.
Wednesday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 75. South southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Thursday
 
 A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny and hot, with a high near 92. Chance of precipitation is 60%.
Thursday Night
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Friday
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 87. Chance of precipitation is 60%.
Friday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Chance of precipitation is 60%.
Independence Day
 
 A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 86. Chance of precipitation is 50%.
Saturday Night
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Sunday
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Sunday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Monday
 
 A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.

 

Forecast from NOAA-NWS for Appleton WI.