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 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
Shifting into September, Westchester records an average high-temperature of a moderately hot 82.6°F (28.1°C), presenting minor fluctuations compared to the previous month. September nights register a minor temperature decline, steadying at 74.3°F (23.5°C).Heat index
The average heat index in September is calculated to be a tropical 89.6°F (32°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humidity
In September, the average relative humidity in Westchester is 76%.Rainfall
In September, in Westchester, the rain falls for 11.3 days. Throughout September, 1.3" (33mm) of precipitation is accumulated. In Westchester, during the entire year, the rain falls for 113.3 days and collects up to 10" (254mm) of precipitation.Snowfall
February through November are months without snowfall in Westchester.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:05 pm EDT.
Sunshine
In Westchester, the average sunshine in September is 9.1h.UV index
In Westchester, South Carolina, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
How hot does it get in Westchester in September?
What is the average humidity in September in Westchester?
How many days does it rain in September in Westchester?
When it does not snow in Westchester?
How many hours of daylight does Westchester have in September?
When are sunrise and sunset in September in Westchester?
How long on average sun shines in September in Westchester?
How high is the UV index in September in Westchester?
Average temperature in September
Westchester, SC
- Average high temperature in September: 82.6°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in September: 74.3°F
The months with the highest average low temperature are July and August (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).
Average pressure in September
Westchester, SC
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Westchester, SC
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in September
Westchester, SC
- Average humidity in September: 76%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January, March and October (73%).
Average rainfall in September
Westchester, SC
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in September
Westchester, SC
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is August (17.3 days).
The month with the least rainy days is November (5.2 days).
Average snowfall days in September
Westchester, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Westchester, SC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Westchester, SC
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is January (23.9 days).
The month with the least sunshine days is August (8.5 days).
Average UV index in September
Westchester, SC
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Westchester, SC
- Average cloud cover in September: 29
The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 25).
Average visibility in September
Westchester, SC
- 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).
Westchester, South Carolina, USA
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