Merrimack, NH weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Merrimack now
Loading the National Weather Service forecast…
Merrimack weather by the hour
Merrimack weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Merrimack.
This week in Merrimack
Sunrise, sunset and moon in Merrimack
What is the weather usually like in Merrimack?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 84°F average high
- Januarycoldest month · 13°F average low
- 48.2 inprecipitation per year · 1,224 mm
- 52.9 insnowfall per year · 134 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Merrimack: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station NASHUA 2 NNW, NH US (USC00275712), adjusted for the elevation of Merrimack.
Merrimack weather month by month
Sunrise and sunset in Merrimack through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:12 AM | 4:38 PM | 9 h 26 min |
| February | 6:41 AM | 5:18 PM | 10 h 37 min |
| March | 6:56 AM | 6:53 PM | 11 h 57 min |
| April | 6:02 AM | 7:29 PM | 13 h 27 min |
| May | 5:21 AM | 8:03 PM | 14 h 42 min |
| June | 5:05 AM | 8:28 PM | 15 h 22 min |
| July | 5:19 AM | 8:24 PM | 15 h 4 min |
| August | 5:51 AM | 7:49 PM | 13 h 58 min |
| September | 6:24 AM | 6:57 PM | 12 h 33 min |
| October | 6:58 AM | 6:05 PM | 11 h 6 min |
| November | 6:36 AM | 4:24 PM | 9 h 47 min |
| December | 7:08 AM | 4:14 PM | 9 h 5 min |
Times for the 15th of each month, local time (America/New York).
What is the weather like in Merrimack?
Merrimack has a hot-summer humid continental climate. The warmest month is July, with an average high of 84°F (29°C), and the coldest is January, with average lows of 13°F (-10°C).
It gets about 48.2 inches (1,224 mm) of precipitation a year. The wettest month is October and the driest is February. Snow is common: about 53 inches fall in an average year.
The best time to visit Merrimack is June to September. At 180 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Merrimack
Weather in towns near Merrimack
Questions about the weather in Merrimack
What is the hottest month in Merrimack?
July, with an average high of 84°F (29°C).
What is the coldest month in Merrimack?
January, with an average low of 13°F (-10°C).
How much does it rain in Merrimack?
About 48.2 inches (1,224 mm) a year; the wettest month is October.
Does it snow in Merrimack?
Yes, about 53 inches of snow fall in an average year.
When is the best time to visit Merrimack?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Merrimack have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Merrimack in November?
Highs average 51°F and lows 29°F, with about 3.9 inches of precipitation.
What time is sunrise in Merrimack?
Around 6:36 AM in mid-November, and sunset around 4:24 PM. Today’s exact times are shown above.
Where does this Merrimack weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Merrimack.
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