Merrimac, MA Climate


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United States / Massachusetts / Boston-Cambridge-Newton Metro Area / Essex County / Merrimac / Zip Codes
Merrimac, MA has a humid continental climate with warm, humid summers and cold, snowy winters. Temperatures in the summer generally range from the mid-50s to near 80 degrees Fahrenheit while winter temperatures can get as low as -10 degrees Fahrenheit or lower. Average snowfall is between 40-50 inches per year and average rainfall is around 44 inches annually. The area often experiences short, but intense thunderstorms during the late spring and early summer months.

Merrimac, Massachusetts gets 50 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Merrimac averages 57 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 201 sunny days per year in Merrimac. The US average is 205 sunny days.

Merrimac gets some kind of precipitation, on average, 130 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 82 degrees
Winter Low: the January low is 15
Rain: averages 50 inches of rain a year
Snow: averages 57 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Merrimac is 6.8 (10=best), which means it is less comfortable than most places in Massachusetts.

9.2 Summer - 4.6 Winter
August, July and June are the most pleasant months in Merrimac, while January and February are the least comfortable months.

  ClimateMerrimac, MassachusettsUnited States
  49.9 in.38.1 in.
  56.5 in.27.8 in.
  129.5 days106.2 days
  201 days205 days
  82.4°85.8°
  14.9°21.7°
  6.87
  3.24.3
  102 ft.2443 ft.
Climate
YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Merrimac with an average high temperature of 82.4°, which ranks it as warmer than most places in Massachusetts. In Merrimac, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Merrimac are June, August and July.
In Merrimac, there are 10.1 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.
January has the coldest nighttime temperatures for Merrimac with an average of 14.9°. This is colder than most places in Massachusetts.
In Merrimac, there are 144.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Massachusetts.
In Merrimac, there are 4.9 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Massachusetts.
Humidity in Merrimac is generally low and comfortable. But there some days when the humidity becomes unpleasant, especially in July and August. The most humid months (but still comfortable) are July, August and June.
March is the wettest month in Merrimac with 5.0 inches of rain, and the driest month is August with 3.5 inches. The wettest season is Summer with 28% of yearly precipitation and 23% occurs in Autumn, which is the driest season. The annual rainfall of 49.9 inches in Merrimac means that it is wetter than most places in Massachusetts.
May is the rainiest month in Merrimac with 12.7 days of rain, and September is the driest month with only 9.4 rainy days. There are 129.5 rainy days annually in Merrimac, which is rainier than most places in Massachusetts. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 24% chance of a rainy day.
An annual snowfall of 56.5 inches in Merrimac means that it is one of the snowiest places in Massachusetts. January is the snowiest month in Merrimac with 17.1 inches of snow, and 6 months of the year have significant snowfall.
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