Merrimack, NH Weather Forecast
Hillsborough County, New Hampshire
Live radar, warnings and storm tracking for Merrimack, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Merrimack
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Merrimack, NH at a glance
Merrimack is home to about 28,916 people in Hillsborough County, across 33 square miles. It ranks 8th by population of 125 places in New Hampshire with a forecast here. The nearest neighbour with its own forecast is Litchfield, 3 miles away.
- County
- Hillsborough County
- Population
- 28,916 2023 est.
- Land area
- 33 sq mi
- People per sq mi
- 887
- Forecast point
- 42.8520°N, 71.5199°W
How well can the network see Merrimack?
The nearest Doppler radar is KBOX (Boston, MA), to the SSE. Its lowest scan passes about 5,100 ft above Merrimack. The beam is above the lowest few thousand feet here, so a warning for Merrimack can come before anything looks dramatic on radar.
The closest weather station is KASH (Nashua/Boire Fld). Close enough that its readings are the conditions in town.
Forecasts near Merrimack
- Litchfield, NH3 mi
- Amherst, NH4 mi
- Bedford, NH6 mi
- Londonderry, NH7 mi
- Nashua, NH7 mi
- Hollis, NH8 mi
- Milford, NH8 mi
- Hudson, NH8 mi
Elsewhere in New Hampshire
ManchesterNashuaConcordDerryRochesterDoverAll New Hampshire forecasts →