August weather forecastRoseland, NJ
August
Weather in August
August, the last month of the summer in Roseland, is also a moderately hot month, with an average temperature varying between 81.9°F (27.7°C) and 66.7°F (19.3°C).Temperature
The start of August sees the average high-temperature at a still warm 81.9°F (27.7°C), showing little difference from July's 83.7°F (28.7°C). In Roseland, August is marked by an average low-temperature of 66.7°F (19.3°C).Heat index
August's average heat index is computed to be a tropical 86°F (30°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.Bear in mind that the heat index values are determined for shaded areas and light breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
The months with the lowest humidity are April and August, with an average relative humidity of 72%.Rainfall
In Roseland, in August, during 14.1 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. In Roseland, during the entire year, the rain falls for 127.3 days and collects up to 12.68" (322mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In August, the average length of the day in Roseland is 13h and 45min.On the first day of August in Roseland, sunrise is at 5:54 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:23 am and sunset at 7:30 pm EDT.
Sunshine
The average sunshine in August is 10.4h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The daily maximum UV index of 6 in August interprets into the following advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Roseland, NJ
- Average high temperature in August: 81.9°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in August: 66.7°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in August
Roseland, NJ
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Roseland, NJ
- Average wind speed in August: 5.8mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in August
Roseland, NJ
- Average humidity in August: 72%
The months with the highest relative humidity are February and December (78%).
The months with the lowest relative humidity are April and August (72%).
Average rainfall in August
Roseland, NJ
- Average rainfall in August: 1.38"
The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in August
Roseland, NJ
- Average rainfall days in August: 14.1 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in August
Roseland, NJ
- Average snowfall in August: 0"
The month with the highest snowfall is March (1.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Roseland, NJ
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (5.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Roseland, NJ
- 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 24min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in August
Roseland, NJ
- Average sunshine days in August: 13.9 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in August
Roseland, NJ
- 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, November and December (UV index 2).
Average cloud cover in August
Roseland, NJ
- Average cloud cover in August: 31
The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in August
Roseland, NJ
- 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).
