August weather forecastRiverhead, NY
August
Weather in August
August, the last month of the summer in Riverhead, is also a moderately hot month, 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, having an average high-temperature of 77.5°F (25.3°C) and an average low-temperature of 71.2°F (21.8°C), is the warmest month.Humidity
In Riverhead, the average relative humidity in August 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, snow does not fall in April, June through October.Daylight
In Riverhead, the average length of the day in August is 13h and 46min.On the first day of August, sunrise is at 5:47 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 7:24 pm EDT.
Sunshine
The months with the most sunshine in Riverhead are July and August, with an average of 10.7h of sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The average daily UV index of 6 in August transforms into the following instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
Average pressure in August
Riverhead, NY
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
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).
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%).
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").
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).
Average snowfall in August
Riverhead, NY
- Average snowfall in August: 0"
The month with the highest snowfall is March (1.54").
The months with the least snowfall are April, June, July, August, September and October (0").
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).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Riverhead, NY
- Average daylight in August: 13h and 48min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 10h and 42min
The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
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).
Average UV index in August
Riverhead, NY
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
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).
Average visibility in August
Riverhead, NY
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
