Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Hackettstown's weather in August displays an average high-temperature of a still warm 81°F (27.2°C), showing minor disparity from July's 82.9°F (28.3°C). During August, Hackettstown consistently records a temperature low averaging a comfortable 61.3°F (16.3°C).Heat index
The heat index for August is calculated to be a hot 86°F (30°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.In terms of the heat index, values are set with light wind and shade conditions in mind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
The average relative humidity in August is 78%.Rainfall
In Hackettstown, in August, during 10.3 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. In Hackettstown, during the entire year, the rain falls for 106.9 days and collects up to 9.84" (250mm) of precipitation.Snowfall
In Hackettstown, snow does not fall in June through September.Daylight
In August, the average length of the day is 13h and 45min.On the first day of the month, sunrise is at 5:56 am and sunset at 8:14 pm. On the last day of August, sunrise is at 6:25 am and sunset at 7:32 pm EDT.
Sunshine
In Hackettstown, the average sunshine in August is 9.9h.UV index
The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 5 in August translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average August temperature?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What is the average length of the day in August?
What time are sunrise and sunset in August?
How long on average sun shines in August?
What is the UV index intensity in August?
Average temperature in August
Hackettstown, NJ
- Average high temperature in August: 81°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in August: 61.3°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in August
Hackettstown, NJ
- Average pressure in August: 29.99"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
Hackettstown, NJ
- Average wind speed in August: 4.9mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in August
Hackettstown, NJ
- Average humidity in August: 78%
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (76%).
Average rainfall in August
Hackettstown, NJ
- Average rainfall in August: 0.94"
The wettest month (with the highest rainfall) is July (1.18").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in August
Hackettstown, NJ
- Average rainfall days in August: 10.3 days
The month with the highest number of rainy days is May (12.2 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in August
Hackettstown, NJ
- Average snowfall in August: 0"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Hackettstown, NJ
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (6.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Hackettstown, NJ
- Average daylight in August: 13h and 5min
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: 9h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in August
Hackettstown, NJ
- Average sunshine days in August: 17.6 days
The month with the most sunshine days is January (21.5 days).
The month with the least sunshine days is May (15.4 days).
Average UV index in August
Hackettstown, NJ
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Hackettstown, NJ
- Average cloud cover in August: 36
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility in August
Hackettstown, NJ
- Average visibility in August: 5mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Hackettstown, New Jersey, USA
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