August weather forecast and climate
Griggstown, NJ

The last month of the summer, August, is another warm month in Griggstown, New Jersey, with average temperature fluctuating between 82.9°F (28.3°C) and 65.8°F (18.8°C).

Temperature

In August, the average high-temperature is relatively the same as in July - a still warm 82.9°F (28.3°C). In August, in Griggstown, the average low-temperature is 65.8°F (18.8°C).

Heat index

In August, the average heat index is appraised at a hot 89.6°F (32°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, wind, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In August, the average relative humidity is 75%.

Rainfall

In August, in Griggstown, the rain falls for 12.6 days. Throughout August, 1.5" (38mm) of precipitation is accumulated. In Griggstown, during the entire year, the rain falls for 119.3 days and collects up to 12.72" (323mm) of precipitation.

Snowfall

In Griggstown snow does not fall in June through October.

Daylight

The average length of the day in Griggstown is 13.7h.

Sunshine

In August, the average sunshine is 10.1h.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in Griggstown, New Jersey. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in August in Griggstown?

The average high-temperature, in August, in Griggstown, is 82.9°F (28.3°C), while the average low-temperature is 65.8°F (18.8°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, in August is estimated at 89.6°F (32°C).

What is the average humidity in August in Griggstown?

In August, the average relative humidity is 75%.

How many days does it rain in August in Griggstown?

In Griggstown, during August, the rain falls for 12.6 days and regularly aggregates up to 1.5" (38mm) of precipitation.

When it does not snow in Griggstown?

June through October are months without snowfall in Griggstown, New Jersey.

How many hours of daylight does Griggstown have in August?

The average length of the day in August in Griggstown, New Jersey, is 13.7h.

How long on average sun shines in August in Griggstown?

The average sunshine in August in Griggstown is 10.1h.

What is the month with the highest UV index in Griggstown?

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

What is the UV index intensity in August in Griggstown?

In August, the average daily maximum UV index in Griggstown is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in August - Griggstown, NJ
  • Average high temperature in August: 28.3°C

The warmest month (with the highest average high temperature) is July (29.3°C).
The month with the lowest average high temperature is January (2.7°C).

  • Average low temperature in August: 18.8°C

The month with the highest average low temperature is July (19.4°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).

Average pressure in August - Griggstown, NJ
  • Average pressure in August: 1015.4mbar

The month with the highest atmospheric pressure is November (1019.7mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in August - Griggstown, NJ
  • Average wind speed in August: 8.7km/h

The windiest month (with the highest average wind speed) is March (14.1km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).

Average humidity in August - Griggstown, NJ
  • Average humidity in August: 75%

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in August - Griggstown, NJ
  • Average rainfall in August: 38mm

The wettest month (with the highest rainfall) is July (43mm).
The driest month (with the least rainfall) is September (17mm).

Average rainfall days in August - Griggstown, NJ
  • Average rainfall days in August: 12.6 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).

Average snowfall in August - Griggstown, NJ
  • Average snowfall in August: 0mm

The month with the highest snowfall is March (36mm).
Months with the least snowfall are June, July, August, September and October (0mm).

Average snowfall days in August - Griggstown, NJ
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (4.6 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in August / Average sunshine in August - Griggstown, NJ
  • Average daylight in August: 13.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in August: 10.1h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in August - Griggstown, NJ
  • Average sunshine days in August: 16.3 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).

Average UV index in August - Griggstown, NJ
  • 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, November and December (UV index 2).

Average cloud cover in August - Griggstown, NJ
  • Average cloud cover in August: 33

Months with the most cloud cover are February, March and December (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 33).

Average visibility in August - Griggstown, NJ
  • Average visibility in August: 9km

Months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is May (8km).