Riverhead (NY) monthly weather averages

Contents

Average daytime temperature

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

Riverhead average temperature chart (Celsius) Riverhead average temperature chart (Fahrenheit)
Average monthly temperatures in Riverhead (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.8 3.3 8 13.5 18.8 23.9 26.9 26.5 23.1 17.5 11.9 5.6
°F 37 38 46.5 56.2 65.8 74.9 80.5 79.6 73.5 63.5 53.4 42

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.

Riverhead monthly rainfall chart (mm) Riverhead monthly rainfall chart (inches)
Average monthly rainfall in Riverhead (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 96 93 113 94 88 65 80 111 89 87 109 115
inches 3.8 3.7 4.4 3.7 3.5 2.6 3.1 4.4 3.5 3.4 4.3 4.5
Rainy days 11 10 11 10 11 10 9 9 8 8 11 12

Average annual rainfall in Riverhead: 1108.234mm (436.3 inches)

Average daily sunshine

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

Riverhead average daily sunshine chart
Average daily sunshine Riverhead
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.2 7.1 8.1 8.7 9.2 9.7 9.4 9 8.1 7.5 5.6 5.3

Day / night temperatures

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

Riverhead average minimum / maximum temperatures (Celsius) Riverhead average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Riverhead (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -5.6 -5 -0.9 3.5 8.8 13.9 17.5 17.1 12.9 7.3 2.5 -2.6
Max °C 3 3.6 8.3 13.7 19 24.1 27.2 26.7 23.3 17.8 12.1 5.8
Min °F 21.9 23.1 30.5 38.3 47.8 57 63.4 62.8 55.2 45.1 36.5 27.4
Max °F 29.7 30.7 38.7 47.5 57 66.2 72.1 71.4 64.6 54.5 45.1 34.9

Sea temperature

The graph below shows the average sea temperature.

Riverhead average sea temperature chart (Celsius) Riverhead average sea temperature chart (Fahrenheit)
Average sea temperature around Riverhead in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7 5.1 5 7 11.2 16.6 21.4 22.4 20.4 16.8 13 9.8
°F 44.6 41.2 41 44.6 52.1 61.9 70.5 72.4 68.8 62.2 55.4 49.7

Wind speed

The graph below shows the average wind speed.

Riverhead average winspeed by month (km/h) Riverhead average winspeed by month (mph)
Average wind speed in Riverhead (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 20 20 20 18 16 16 15 16 17 18 19
mph 12 12 13 12 11 10 10 9 10 11 11 12

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.

Riverhead relative humidity averages
Average relative humidity in Riverhead
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
67% 66% 65% 64% 70% 72% 73% 75% 75% 72% 70% 68%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Riverhead weather stats

Riverhead weather statistics
Hottest month: July 26.9°C 80.4°F
Driest month: June 65mm 2.6ins
Sunniest month: March 8.1hrs
Coldest month: January 2.8°C 37°F
Wettest month: December 115mm 4.5ins
Warmest sea: August 22.4°C 72.3°F
Map showing location of Riverhead (40.91704, -72.66204) Riverhead map pin © Google

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