National Weather Service Forecast for: Brownsburg IN
Issued by: National Weather Service Indianapolis, IN
Updated: 11:45 am EDT May 26, 2026
 
This
Afternoon
This Afternoon: A 20 percent chance of showers after 3pm. Cloudy, with a steady temperature around 76. East southeast wind around 6 mph.
Slight Chance
Showers

 Tonight

Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 63. Southeast wind around 6 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Slight Chance
T-storms then
Showers
Likely
 Wednesday

Wednesday: Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 11am, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 77. Light and variable wind becoming north around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Chance
T-storms
 Wednesday
Night
Wednesday Night: A slight chance of thunderstorms before 8pm. Mostly clear, with a low around 61. Light north northwest wind. Chance of precipitation is 10%.
Slight Chance
T-storms then
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 79. Northeast wind 7 to 9 mph.
Mostly Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 56. East wind 5 to 7 mph.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 77. East northeast wind around 6 mph.
Mostly Sunny

 Friday
Night
Friday Night: Partly cloudy, with a low around 56. Northeast wind 3 to 5 mph.
Partly Cloudy

 Saturday

Saturday: Mostly sunny, with a high near 76. East northeast wind 5 to 10 mph.
Mostly Sunny
Hi 76 °F Lo 63 °F Hi 77 °F Lo 61 °F Hi 79 °F Lo 56 °F Hi 77 °F Lo 56 °F Hi 76 °F

Hazardous Weather Outlook
 

This Afternoon
 
 A 20 percent chance of showers after 3pm. Cloudy, with a steady temperature around 76. East southeast wind around 6 mph.
Tonight
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 63. Southeast wind around 6 mph becoming calm. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 11am, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 77. Light and variable wind becoming north around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
 A slight chance of thunderstorms before 8pm. Mostly clear, with a low around 61. Light north northwest wind. Chance of precipitation is 10%.
Thursday
 
 Mostly sunny, with a high near 79. Northeast wind 7 to 9 mph.
Thursday Night
 
 Partly cloudy, with a low around 56. East wind 5 to 7 mph.
Friday
 
 Mostly sunny, with a high near 77. East northeast wind around 6 mph.
Friday Night
 
 Partly cloudy, with a low around 56. Northeast wind 3 to 5 mph.
Saturday
 
 Mostly sunny, with a high near 76. East northeast wind 5 to 10 mph.
Saturday Night
 
 Mostly clear, with a low around 53. East northeast wind around 9 mph.
Sunday
 
 Sunny, with a high near 75.
Sunday Night
 
 Mostly clear, with a low around 55.
Monday
 
 Sunny, with a high near 77.

 

Forecast from NOAA-NWS for Brownsburg IN.