Merrimack (NH) Weather and Climate: A Comprehensive Guide
Merrimack experiences great temperature shifts.
The city's weather can transition from warm days
to very cold weather.
It also has a notably wet climate with much precipitation.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
The climate in Merrimack is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 29°C in July, the warmest time of the year, to a very cold 1°C during cooler months like January.
At night, temperatures typically drop to an average of around -9°C during these months. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Merrimack has a notably wet climate with abundant precipitation, recording 1210 mm of rain/snowfall per year. Year-round, Merrimack has a balanced climate with minimal variation in precipitation. The difference between the wettest month, June, with 127 mm, and the driest month, January, with 79 mm, is minimal.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Merrimack. While July receives considerable daily sunshine with up to 9.8 hours, November marks the darkest time of the year, where sunshine is scarce with only 4.2 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is high throughout the year in Merrimack.
The city experiences its highest humidity in September, reaching 76%. In April, the humidity drops to its lowest level at 62%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
clear and no rain partly cloudy and no rain broken clouds and no rainForecast for Merrimack (NH)
2 m/s
2 m/s
2 m/s
The best time of year to visit Merrimack in the United States of America
During the months of May, June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
July has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 1°C.
June tops the wettest month list with 127 mm of rainfall.
January is the driest month with 79 mm of precipitation.
July is the sunniest month with an average of 295 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
