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

Overnight: Patchy fog. Otherwise, partly cloudy, with a low around 64. Calm wind.
Patchy Fog

 Tuesday

Tuesday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Patchy Fog
then Mostly
Sunny
 Tuesday
Night
Tuesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Slight Chance
T-storms
 Wednesday

Wednesday: Mostly sunny, with a high near 93. Heat index values as high as 99. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 74. 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 75.
Clear

 Friday

Friday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 99.
Sunny then
Chance
T-storms
 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73.
Chance
T-storms then
Partly Cloudy
Lo 64 °F Hi 87 °F Lo 70 °F Hi 93 °F Lo 74 °F Hi 100 °F Lo 75 °F Hi 99 °F Lo 73 °F

Hazardous Weather Outlook
Extreme Heat Watch
Air Quality Alert
 

Overnight
 
 Patchy fog. Otherwise, partly cloudy, with a low around 64. Calm wind.
Tuesday
 
 Patchy fog before 7am. Otherwise, mostly sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70. South wind 5 to 10 mph becoming light southwest in the evening. Winds could gust as high as 20 mph.
Wednesday
 
 Mostly sunny, with a high near 93. Heat index values as high as 99. Light southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Wednesday Night
 
 Mostly clear, with a low around 74. Light southwest wind.
Thursday
 
 Sunny and hot, with a high near 100.
Thursday Night
 
 Clear, with a low around 75.
Friday
 
 A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 99.
Friday Night
 
 A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73.
Independence Day
 
 A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 97.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Sunday
 
 A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Sunday Night
 
 A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Monday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.

 

Forecast from NOAA-NWS for New Haven CT.