National Weather Service Forecast for: Oakville CT
Issued by: National Weather Service Albany, NY
Updated: 2:36 am EDT Jun 30, 2026
 
Today

Today: A chance of showers, mainly after 5pm.  Mostly sunny, with a high near 88. Calm wind becoming southwest 5 to 9 mph in the afternoon.  Chance of precipitation is 30%.
Sunny then
Chance
Showers
Tonight

Tonight: A chance of showers and thunderstorms before 2am, then a slight chance of showers.  Partly cloudy, with a low around 65. South wind 5 to 7 mph.  Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Slight Chance
T-storms
Wednesday

Wednesday: A slight chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 94. Heat index values as high as 103. Southwest wind around 8 mph, with gusts as high as 20 mph.  Chance of precipitation is 20%.
Sunny then
Slight Chance
T-storms
Wednesday
Night
Wednesday Night: Patchy fog after 5am.  Otherwise, partly cloudy, with a low around 71. Southwest wind around 6 mph becoming calm  in the evening.
Mostly Cloudy
then Patchy
Fog
Thursday

Thursday: Patchy fog before 8am.  Otherwise, sunny and hot, with a high near 99. Calm wind becoming west 5 to 8 mph in the morning.
Patchy Fog
then Sunny

Thursday
Night
Thursday Night: Clear, with a low around 73.
Clear

Friday

Friday: A chance of showers and thunderstorms after 2pm.  Sunny and hot, with a high near 98. Chance of precipitation is 30%.
Sunny then
Chance
T-storms
Friday
Night
Friday Night: A chance of showers and thunderstorms before 8pm.  Mostly clear, with a low around 70. Chance of precipitation is 30%.
Chance
T-storms then
Mostly Clear
Independence
Day
Independence Day: A chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 94. Chance of precipitation is 40%.
Sunny then
Chance
T-storms
Hi 88 °F Lo 65 °F Hi 94 °F Lo 71 °F Hi 99 °F Lo 73 °F Hi 98 °F Lo 70 °F Hi 94 °F

Extreme Heat Watch
 

Today
 
A chance of showers, mainly after 5pm. Mostly sunny, with a high near 88. Calm wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 30%.
Tonight
 
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 65. South wind 5 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 94. Heat index values as high as 103. Southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday Night
 
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 71. Southwest wind around 6 mph becoming calm in the evening.
Thursday
 
Patchy fog before 8am. Otherwise, sunny and hot, with a high near 99. Calm wind becoming west 5 to 8 mph in the morning.
Thursday Night
 
Clear, with a low around 73.
Friday
 
A chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 98. Chance of precipitation is 30%.
Friday Night
 
A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 70. Chance of precipitation is 30%.
Independence Day
 
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 94. Chance of precipitation is 40%.
Saturday Night
 
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunday
 
Mostly sunny and hot, with a high near 91.
Sunday Night
 
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Monday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Oakville CT.