| NWS Forecast for: New Castle NH Issued by: National Weather Service Gray/Portland, ME Last Update: 6:44 am EDT Jul 21, 2026 | |
| Today: Mostly cloudy, with a high near 75. Southeast wind 5 to 15 mph, with gusts as high as 25 mph. Tonight: Showers and thunderstorms before 2am, then a chance of showers. 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 100%. New rainfall amounts between a quarter and half 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) | |
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