Merrimack (NH) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Merrimack

Merrimack average temperature chart (Celsius) Merrimack average temperature chart (Fahrenheit)
Average monthly temperatures in Merrimack (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 0.1 1.5 6.7 13.6 20.2 25 27.8 26.7 22.2 16.4 9.5 2.5
°F 32.1 34.6 44.1 56.6 68.4 77.1 82.1 80.1 72 61.6 49.1 36.5

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Merrimack monthly rainfall chart (mm) Merrimack monthly rainfall chart (inches)
Average monthly rainfall in Merrimack (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 77 75 83 89 87 88 86 86 81 90 107 92
inches 3 3 3.3 3.5 3.4 3.4 3.4 3.4 3.2 3.5 4.2 3.6
Rainy days 10 9 11 11 12 11 10 10 9 9 11 12

Average annual rainfall in Merrimack: 1011.1mm (398.1 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Merrimack

Merrimack average daily sunshine chart
Average daily sunshine Merrimack
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.8 6.6 7.2 7.9 8.9 9.8 10.2 9.2 7.9 6.7 4.9 5

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Merrimack average minimum / maximum temperatures (Celsius) Merrimack average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Merrimack (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -11.6 -10.4 -4.4 1.1 6.7 12.1 15.1 14.2 9.5 3.5 -0.9 -7.8
Max °C 0.4 1.8 7 14 20.6 25.4 28.2 27.1 22.6 16.8 9.8 2.8
Min °F 11.2 13.4 24.1 33.9 44 53.7 59.1 57.5 49 38.2 30.3 18.1
Max °F 21.9 24.3 34.3 45.5 56.5 65.7 70.9 69.1 60.8 50.2 39.9 27.5

Sea temperature

The graph below shows the average sea temperature.

Merrimack average sea temperature chart (Celsius) Merrimack average sea temperature chart (Fahrenheit)
Average sea temperature around Merrimack in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.4 3.8 3.5 5.2 9.1 14 18.6 19.8 17.8 14.2 10.7 7.9
°F 41.8 38.8 38.3 41.4 48.4 57.3 65.4 67.7 64.1 57.6 51.3 46.2

Wind speed

The graph below shows the average wind speed.

Merrimack average winspeed by month (km/h) Merrimack average winspeed by month (mph)
Average wind speed in Merrimack (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 15 16 16 16 14 13 12 12 12 13 14 15
mph 9 10 10 10 9 8 8 7 8 8 9 9

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Merrimack relative humidity averages
Average relative humidity in Merrimack
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
66% 65% 64% 62% 65% 70% 71% 74% 75% 72% 71% 70%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Merrimack weather stats

Merrimack weather statistics
Hottest month: July 27.8°C 82°F
Driest month: February 75mm 3ins
Sunniest month: July 10.2hrs
Coldest month: January 0.1°C 32.2°F
Wettest month: November 107mm 4.2ins
Warmest sea: August 19.8°C 67.6°F
Map showing location of Merrimack (42.86509, -71.4934) Merrimack map pin © Google

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