National Weather Service Forecast for: Willimantic CT
Issued by: National Weather Service Norton, MA
Updated: 2:22 pm EDT Jul 26, 2025
 
Tonight

Tonight: Widespread haze before 11pm. Areas of smoke before 11pm. Mostly cloudy, with a low around 63. South wind around 6 mph becoming calm in the evening.
Haze then
Mostly Cloudy
 Sunday

Sunday: Showers and thunderstorms likely, mainly before 11am. Mostly cloudy, with a high near 79. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely
 Sunday
Night
Sunday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 67. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Slight Chance
T-storms then
Patchy Fog
 Monday

Monday: Patchy fog before 8am. Otherwise, mostly sunny and hot, with a high near 93. Heat index values as high as 102. Calm wind becoming north around 5 mph in the afternoon.
Patchy Fog
then Sunny
 Monday
Night
Monday Night: Mostly clear, with a low around 69. Light south wind.
Mostly Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 96. Calm wind becoming west 5 to 8 mph in the afternoon.
Hot

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 70. West wind around 5 mph becoming calm in the evening.
Mostly Clear

 Wednesday

Wednesday: Sunny and hot, with a high near 93. Calm wind becoming west 5 to 7 mph in the afternoon.
Hot

 Wednesday
Night
Wednesday Night: A chance of showers after midnight. Partly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Partly Cloudy
then Chance
Showers
Lo 63 °F Hi 79 °F Lo 67 °F Hi 93 °F Lo 69 °F Hi 96 °F Lo 70 °F Hi 93 °F Lo 68 °F

Heat Advisory
 

Tonight
 
 Widespread haze before 11pm. Areas of smoke before 11pm. Mostly cloudy, with a low around 63. South wind around 6 mph becoming calm in the evening.
Sunday
 
 Showers and thunderstorms likely, mainly before 11am. Mostly cloudy, with a high near 79. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
 
 A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 67. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Monday
 
 Patchy fog before 8am. Otherwise, mostly sunny and hot, with a high near 93. Heat index values as high as 102. Calm wind becoming north around 5 mph in the afternoon.
Monday Night
 
 Mostly clear, with a low around 69. Light south wind.
Tuesday
 
 Sunny and hot, with a high near 96. Calm wind becoming west 5 to 8 mph in the afternoon.
Tuesday Night
 
 Mostly clear, with a low around 70. West wind around 5 mph becoming calm in the evening.
Wednesday
 
 Sunny and hot, with a high near 93. Calm wind becoming west 5 to 7 mph in the afternoon.
Wednesday Night
 
 A chance of showers after midnight. Partly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
 
 A chance of showers. Mostly cloudy, with a high near 82. West wind 3 to 7 mph. Chance of precipitation is 50%.
Thursday Night
 
 A chance of showers. Mostly cloudy, with a low around 60. North wind 3 to 5 mph. Chance of precipitation is 40%.
Friday
 
 Mostly sunny, with a high near 80. North wind around 7 mph.
Friday Night
 
 Mostly clear, with a low around 55. North wind 3 to 5 mph.
Saturday
 
 Sunny, with a high near 80. Northwest wind 3 to 7 mph.

 

Forecast from NOAA-NWS for Willimantic CT.