Weather forecast for: Cornwall CT
Last Update: 8:36 pm EDT Sep 4, 2026
Overnight: Clear, with a low around 57. Northwest wind around 5 mph.
Saturday: Sunny, with a high near 75. North wind 5 to 8 mph.
Saturday Night: A chance of showers, mainly between 8pm and 11pm. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 53. North wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday: Mostly sunny, with a high near 71. Calm wind becoming north around 5 mph in the afternoon.
Sunday Night: Mostly clear, with a low around 48. Calm wind.
Labor Day: Sunny, with a high near 74.
Monday Night: Mostly clear, with a low around 52.
Tuesday: Mostly sunny, with a high near 76.
Tuesday Night: Mostly cloudy, with a low around 55.
Wednesday: Partly sunny, with a high near 75.
Wednesday Night: A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
Thursday: A chance of showers. Mostly sunny, with a high near 78. Chance of precipitation is 30%.
Thursday Night: A chance of showers. Partly cloudy, with a low around 54. Chance of precipitation is 30%.
Friday: Mostly sunny, with a high near 69.