Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a hot 86.5°F (30.3°C) in August to a warm 80.8°F (27.1°C). In Delaware Park, September nights cool down to an average of 63.9°F (17.7°C).Heat index
September's heat index is evaluated at a hot 86°F (30°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.Understand that the heat index values take into account shaded locations and mild winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Humidity
The average relative humidity in September is 78%.Rainfall
The month with the least rainfall in Delaware Park is September, when the rain falls for 13 days and typically collects 2.28" (58mm) of precipitation.Snowfall
In Delaware Park, snow does not fall in April through October.Daylight
The average length of the day in September in Delaware Park, Virginia, is 12h and 24min.On the first day of September in Delaware Park, Virginia, sunrise is at 6:39 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:52 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In Delaware Park, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 5 in September interprets into the following advice:
Be vigilant - A duty to shield skin and eyes from injury exists. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
What is the temperature in September in Delaware Park?
What is the average humidity in September in Delaware Park?
What is the driest month in Delaware Park?
How much does it rain in Delaware Park in September?
When it does not snow in Delaware Park?
How many hours of daylight does Delaware Park have in September?
When is the sunrise / sunset in September in Delaware Park?
How long on average sun shines in September in Delaware Park?
How high is the UV index in September in Delaware Park?
Average temperature in September
Delaware Park, VA
- Average high temperature in September: 80.8°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (46.8°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).
Average pressure in September
Delaware Park, VA
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Delaware Park, VA
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Delaware Park, VA
- Average humidity in September: 78%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is January (75%).
Average rainfall in September
Delaware Park, VA
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is September (2.28").
Average rainfall days in September
Delaware Park, VA
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is November (10.4 days).
Average snowfall in September
Delaware Park, VA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Delaware Park, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Delaware Park, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Delaware Park, VA
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in September
Delaware Park, VA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Delaware Park, VA
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in September
Delaware Park, VA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Delaware Park, Virginia, USA
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