National Weather Service Forecast for: Brownsburg IN
Issued by: National Weather Service Indianapolis, IN
Updated: 1:15 am EST Dec 18, 2025
 
Overnight

Overnight: Cloudy, with a steady temperature around 41. South wind 9 to 13 mph, with gusts as high as 23 mph.
Cloudy


 Thursday

Thursday: Rain before 1pm, then rain and possibly a thunderstorm between 1pm and 4pm, then rain after 4pm. High near 52. Breezy, with a south wind 16 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Rain and
Breezy

 Thursday
Night
Thursday Night: A chance of rain before 11pm, then a chance of snow between 11pm and 1am. Mostly cloudy, with a low around 18. Breezy, with a west wind 13 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.
Chance
Rain/Snow
then Chance
Snow and
Breezy
 Friday

Friday: Mostly cloudy, then gradually becoming sunny, with a high near 28. West wind 10 to 18 mph, with gusts as high as 30 mph.
Decreasing
Clouds

 Friday
Night
Friday Night: Partly cloudy, with a low around 23. South wind 6 to 13 mph, with gusts as high as 23 mph.
Partly Cloudy


 Saturday

Saturday: Mostly cloudy, with a high near 45. South wind 14 to 17 mph, with gusts as high as 29 mph.
Mostly Cloudy


 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 24. Southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Mostly Cloudy


 Sunday

Sunday: Mostly sunny, with a high near 37. Northwest wind around 8 mph.
Mostly Sunny


 Sunday
Night
Sunday Night: Partly cloudy, with a low around 24. North northwest wind around 5 mph becoming east after midnight.
Partly Cloudy
Lo 41 °F Hi 52 °F Lo 18 °F Hi 28 °F Lo 23 °F Hi 45 °F Lo 24 °F Hi 37 °F Lo 24 °F

 

Overnight
 
 Cloudy, with a steady temperature around 41. South wind 9 to 13 mph, with gusts as high as 23 mph.
Thursday
 
 Rain before 1pm, then rain and possibly a thunderstorm between 1pm and 4pm, then rain after 4pm. High near 52. Breezy, with a south wind 16 to 24 mph, with gusts as high as 43 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
 
 A chance of rain before 11pm, then a chance of snow between 11pm and 1am. Mostly cloudy, with a low around 18. Breezy, with a west wind 13 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 30%.
Friday
 
 Mostly cloudy, then gradually becoming sunny, with a high near 28. West wind 10 to 18 mph, with gusts as high as 30 mph.
Friday Night
 
 Partly cloudy, with a low around 23. South wind 6 to 13 mph, with gusts as high as 23 mph.
Saturday
 
 Mostly cloudy, with a high near 45. South wind 14 to 17 mph, with gusts as high as 29 mph.
Saturday Night
 
 Mostly cloudy, with a low around 24. Southwest wind 8 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Sunday
 
 Mostly sunny, with a high near 37. Northwest wind around 8 mph.
Sunday Night
 
 Partly cloudy, with a low around 24. North northwest wind around 5 mph becoming east after midnight.
Monday
 
 Partly sunny, with a high near 40. East southeast wind around 7 mph.
Monday Night
 
 Isolated showers. Mostly cloudy, with a low around 35. Chance of precipitation is 20%.
Tuesday
 
 Isolated showers. Mostly cloudy, with a high near 48. Chance of precipitation is 20%.
Tuesday Night
 
 Mostly cloudy, with a low around 35.
Wednesday
 
 Isolated showers. Mostly cloudy, with a high near 47. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Brownsburg IN.