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
A moderate decline in average high-temperatures is noted in September, moving from a hot 88.3°F (31.3°C) in August to a moderately hot 81.3°F (27.4°C). Throughout September, Keeling records an average temperature of 61.9°F (16.6°C) at night.Heat index
For September, the heat index is evaluated at a tropical 86°F (30°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.It is emphasized that the heat index's values are meant for shaded zones with mild winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
In Keeling, Virginia, the average relative humidity in September is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.1 days and typically collects 1.61" (41mm) of precipitation.Snowfall
In Keeling, Virginia, snow does not fall in April through October.Daylight
In Keeling, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 6:48 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:01 pm EDT.
Sunshine
In Keeling, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the usual temperature for Keeling in September?
What is the average humidity in September in Keeling?
What is the driest month in Keeling?
How much does it rain in Keeling in September?
When it does not snow in Keeling?
What is the average length of the day in September in Keeling?
When is the sunrise / sunset in September in Keeling?
How long on average sun shines in September in Keeling?
How high is the UV index in September in Keeling?
Average temperature in September
Keeling, VA
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Keeling, VA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Keeling, VA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Keeling, VA
- Average humidity in September: 74%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Keeling, VA
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
Keeling, VA
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Keeling, VA
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Keeling, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Keeling, 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: 8h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Keeling, VA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (12.4 days).
Average UV index in September
Keeling, VA
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Keeling, VA
- Average cloud cover in September: 37
The months with the most cloud cover are February and March (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Keeling, VA
- Average visibility in September: 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).
Keeling, Virginia, USA
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