August weather forecast and climate
Riverhead, NY

Weather in August

The last month of the summer, August, is another warm month in Riverhead, New York, with temperature in the range of an average low of 71.2°F (21.8°C) and an average high of 77.5°F (25.3°C).

Temperature

August is the warmest month, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 71.2°F (21.8°C).

Humidity

In Riverhead, the average relative humidity is 76%.

Rainfall

In Riverhead, in August, it is raining for 14.7 days, with typically 2.64" (67mm) of accumulated precipitation. In Riverhead, during the entire year, the rain falls for 154.3 days and collects up to 30" (762mm) of precipitation.

Snowfall

In Riverhead, New York, snow does not fall in April, June through October.

Daylight

In August, the average length of the day in Riverhead is 13.7h.

Sunshine

Months with the most sunshine are July and August, with an average of 10.7h of sunshine.

UV index

Months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for the average person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the warmest month in Riverhead?

August is the warmest month in Riverhead, New York, with an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 71.2°F (21.8°C).

What is the average humidity in August in Riverhead?

In August, the average relative humidity in Riverhead is 76%.

How much does it rain in Riverhead in August?

In Riverhead, during August, the rain falls for 14.7 days and regularly aggregates up to 2.64" (67mm) of precipitation.

When it does not snow in Riverhead?

April, June through October are months without snowfall in Riverhead.

How many hours of daylight does Riverhead have in August?

In Riverhead, New York, the average length of the day in August is 13.7h.

What are the months with the most sunshine in Riverhead?

July and August, with an average of 10.7h of sunshine, are months with the most sunshine in Riverhead, New York.

How long on average sun shines in August in Riverhead?

In Riverhead, New York, the average sunshine in August is 10.7h.

When is the highest UV index in Riverhead?

Months with the highest UV index in Riverhead, New York, are June through August, with an average maximum UV index of 6.

How high is the UV index in August in Riverhead?

In August, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV radiation.

Average temperature in August
Riverhead, NY

Average temperature in August - Riverhead, NY
  • Average high temperature in August: 77.5°F

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in August: 71.2°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in August
Riverhead, NY

Average pressure in August - Riverhead, NY
  • Average pressure in August: 29.98"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in August
Riverhead, NY

Average wind speed in August - Riverhead, NY
  • Average wind speed in August: 9.6mph

The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest month (with the lowest average wind speed) is July (9.5mph).

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Average humidity in August
Riverhead, NY

Average humidity in August - Riverhead, NY
  • Average humidity in August: 76%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).

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Average rainfall in August
Riverhead, NY

Average rainfall in August - Riverhead, NY
  • Average rainfall in August: 2.64"

The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in August
Riverhead, NY

Average rainfall days in August - Riverhead, NY
  • Average rainfall days in August: 14.7 days

The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is February (9 days).

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Average snowfall in August
Riverhead, NY

Average snowfall in August - Riverhead, NY
  • Average snowfall in August: 0"

The month with the highest snowfall is March (1.54").
Months with the least snowfall are April, June, July, August, September and October (0").

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Average snowfall days in August
Riverhead, NY

Average snowfall days in August - Riverhead, NY
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (5.5 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
Riverhead, NY

Average daylight in August / Average sunshine in August - Riverhead, NY
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in August: 10.7h

Months with the most sunshine are July and August (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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Average sunshine days in August
Riverhead, NY

Average sunshine days in August - Riverhead, NY
  • Average sunshine days in August: 13.8 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is February (13.2 days).

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Average UV index in August
Riverhead, NY

Average UV index in August - Riverhead, NY
  • Average UV index in August: 6

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March and December (UV index 2).

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Average cloud cover in August
Riverhead, NY

Average cloud cover in August - Riverhead, NY
  • Average cloud cover in August: 27

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in August
Riverhead, NY

Average visibility in August - Riverhead, NY
  • Average visibility in August: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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