National Weather Service Forecast for: Brownsburg IN
Issued by: National Weather Service Indianapolis, IN
Updated: 9:15 am EST Dec 22, 2025
 
Today

Today: A 10 percent chance of rain after 5pm. Partly sunny, with a high near 48. South southeast wind 8 to 11 mph, with gusts as high as 22 mph.
Mostly Cloudy
then Slight
Chance Rain
 Tonight

Tonight: A chance of rain before 2am, then patchy drizzle after 2am. Patchy fog after midnight. Otherwise, cloudy, with a temperature falling to near 43 by 11pm, then rising to around 48 during the remainder of the night. South wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
and Patchy
Fog
 Tuesday

Tuesday: Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 55. West southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Patchy Fog
then Mostly
Sunny
 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 34. Light and variable wind.
Partly Cloudy

 Wednesday

Wednesday: A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 55. South southeast wind 6 to 9 mph.
Mostly Cloudy
then Slight
Chance Rain
 Wednesday
Night
Wednesday Night: Rain likely. Cloudy, with a low around 50. South southeast wind around 8 mph becoming southwest after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Rain Likely

 Christmas
Day
Christmas Day: Mostly cloudy, with a high near 63. West southwest wind 6 to 9 mph.
Mostly Cloudy

 Thursday
Night
Thursday Night: A slight chance of rain, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 55. South southwest wind 8 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Slight Chance
Rain then
Slight Chance
T-storms
 Friday

Friday: Mostly sunny, with a high near 65. West southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Mostly Sunny
Hi 48 °F Lo 43 °F⇑ Hi 55 °F Lo 34 °F Hi 55 °F Lo 50 °F Hi 63 °F Lo 55 °F Hi 65 °F

 

Today
 
 A 10 percent chance of rain after 5pm. Partly sunny, with a high near 48. South southeast wind 8 to 11 mph, with gusts as high as 22 mph.
Tonight
 
 A chance of rain before 2am, then patchy drizzle after 2am. Patchy fog after midnight. Otherwise, cloudy, with a temperature falling to near 43 by 11pm, then rising to around 48 during the remainder of the night. South wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
 
 Patchy fog before 9am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 55. West southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
 
 Partly cloudy, with a low around 34. Light and variable wind.
Wednesday
 
 A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 55. South southeast wind 6 to 9 mph.
Wednesday Night
 
 Rain likely. Cloudy, with a low around 50. South southeast wind around 8 mph becoming southwest after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Christmas Day
 
 Mostly cloudy, with a high near 63. West southwest wind 6 to 9 mph.
Thursday Night
 
 A slight chance of rain, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 55. South southwest wind 8 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Friday
 
 Mostly sunny, with a high near 65. West southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Friday Night
 
 Mostly cloudy, with a low around 43. West wind 6 to 8 mph becoming south after midnight.
Saturday
 
 Mostly cloudy, with a high near 58.
Saturday Night
 
 A 40 percent chance of rain. Mostly cloudy, with a low around 33.
Sunday
 
 A 20 percent chance of rain. Mostly cloudy, with a high near 41.

 

Forecast from NOAA-NWS for Brownsburg IN.