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
As Chester enters September, the average high-temperature subtly lowers from the a tropical 88.3°F (31.3°C) of August to a moderately hot 81.5°F (27.5°C). Chester observes an average nighttime temperature of 63.3°F (17.4°C) during September.Heat index
In September, the average heat index is estimated at a tropical 86°F (30°C). Enduring exposure and continuous activity might cause a feeling of tiredness and induce heat cramps.Heat index evaluations are typically in the context of light winds and shaded environments. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In September, the average relative humidity is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.3 days and typically collects 1.42" (36mm) of precipitation.Snowfall
In Chester, snow does not fall in May through October.Daylight
In Chester, Virginia, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:40 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:54 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 in September translates into these instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Chester have in September?
What is the UV index intensity in September?
Average temperature in September
Chester, VA
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (45°F).
- Average low temperature in September: 63.3°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 (29.7°F).
Average pressure in September
Chester, VA
- Average pressure in September: 30.04"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
Chester, VA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Chester, VA
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).
Average rainfall in September
Chester, VA
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is August (2.28").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Chester, VA
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in September
Chester, VA
- Average snowfall in September: 0"
The months with the highest snowfall are February and March (1.1").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Chester, 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
Chester, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Chester, VA
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (12.8 days).
Average UV index in September
Chester, VA
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Chester, VA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Chester, 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).
Chester, Virginia, USA
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