| NWS Forecast for: Merrimack NH Issued by: National Weather Service Gray/Portland, ME Last Update: 1:45 pm EDT Jul 13, 2025 | |
Tonight: Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 66. South wind around 5 mph becoming calm in the evening. Monday: A slight chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 86. Calm wind becoming south around 5 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. Monday Night: Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 69. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Tuesday: Mostly sunny and hot, with a high near 91. Heat index values as high as 95. Calm wind. Tuesday Night: Mostly clear, with a low around 68. Calm wind. Wednesday: Sunny and hot, with a high near 93. Wednesday Night: Partly cloudy, with a low around 72. Thursday: A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny and hot, with a high near 92. Thursday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 72. Friday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Friday Night: A 30 percent chance of showers. Partly cloudy, with a low around 68. Saturday: A 30 percent chance of showers. Partly sunny, with a high near 84. Saturday Night: A 30 percent chance of showers. Partly cloudy, with a low around 64. Sunday: Partly sunny, with a high near 83. | |
| Merrimack NH 42.86°N 71.49°W (Elev. 118 ft) | |
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