National Weather Service Forecast for: Danbury CT
Issued by: National Weather Service New York, NY
Updated: 3:53 pm EDT Jun 29, 2026
 
Overnight

Overnight: Mostly clear, with a low around 63. Calm wind.
Mostly Clear

Tuesday

Tuesday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 89. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Patchy Fog
then Partly
Sunny
Tuesday
Night
Tuesday Night: A 20 percent chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 69. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Slight Chance
T-storms

Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 96. Heat index values as high as 105. West wind 6 to 11 mph, with gusts as high as 21 mph.
Mostly Sunny
then Slight
Chance
T-storms
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 75. Light southwest wind.
Mostly Clear

Thursday

Thursday: Sunny and hot, with a high near 100.
Hot

Thursday
Night
Thursday Night: Clear, with a low around 74.
Clear

Friday

Friday: Sunny and hot, with a high near 100.
Hot

Friday
Night
Friday Night: Partly cloudy, with a low around 72.
Partly Cloudy

Lo 63 °F Hi 89 °F Lo 69 °F Hi 96 °F Lo 75 °F Hi 100 °F Lo 74 °F Hi 100 °F Lo 72 °F

Hazardous Weather Outlook
Extreme Heat Watch
Air Quality Alert
 

Overnight
 
Mostly clear, with a low around 63. Calm wind.
Tuesday
 
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 89. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph.
Tuesday Night
 
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 69. Southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Wednesday
 
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Heat index values as high as 105. West wind 6 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
 
Mostly clear, with a low around 75. Light southwest wind.
Thursday
 
Sunny and hot, with a high near 100.
Thursday Night
 
Clear, with a low around 74.
Friday
 
Sunny and hot, with a high near 100.
Friday Night
 
Partly cloudy, with a low around 72.
Independence Day
 
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98.
Saturday Night
 
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
 
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Sunday Night
 
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Monday
 
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Danbury CT.