| NWS Forecast for: New Castle NH Issued by: National Weather Service Gray/Portland, ME Last Update: 10:49 am EDT Jul 21, 2026 |  |
| This Afternoon: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 75. Southeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Tonight: Rain and thunderstorms before 1am, then a slight chance of showers and thunderstorms between 1am and 2am. Patchy fog between 10pm and 2am. Low around 64. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible. Wednesday: A 50 percent chance of showers and thunderstorms, mainly after 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 82. South wind 5 to 10 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Wednesday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 60. West wind around 5 mph. Thursday: Sunny, with a high near 77. West wind around 5 mph. Thursday Night: Mostly clear, with a low around 58. Friday: Sunny, with a high near 76. Friday Night: Mostly clear, with a low around 59. Saturday: Sunny, with a high near 72. Saturday Night: Partly cloudy, with a low around 59. Sunday: Mostly sunny, with a high near 73. Sunday Night: Partly cloudy, with a low around 62. Monday: A 40 percent chance of showers. Mostly sunny, with a high near 76. | |
| New Castle NH 43.07°N 70.72°W (Elev. 26 ft) | |
Visit your local NWS office at: https://www.weather.gov/gyx/ |
