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
Westchester's average high-temperature in September is a still tropical 87.6°F (30.9°C), marking an insignificant difference from the 89.2°F (31.8°C) of August. Nights in September exhibit a minor reduction to an average low temperature of 79.7°F (26.5°C).Heat index
September's average heat index is calculated to be a torrid 100.4°F (38°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.Always consider that heat index estimations are for light winds and places in the shade. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.
Humidity
In Westchester, the average relative humidity in September is 72%.Rainfall
In Westchester, during September, the rain falls for 13.8 days and regularly aggregates up to 0.71" (18mm) of precipitation. In Westchester, during the entire year, the rain falls for 110.8 days and collects up to 8.19" (208mm) of precipitation.Snowfall
September is the only month when snow falls. The month with the most snowfall days is September, when snow falls for 0.1 days.Daylight
The average length of the day in September is 12h and 17min.On the first day of September, sunrise is at 7:01 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:08 pm EDT.
Sunshine
The average sunshine in September is 9.2h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 7 in September translates into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Westchester in September?
What is the average humidity in September?
How many days does it rain in September?
When does it snow the most?
When does it start to snow?
How many hours of daylight does Westchester have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What are the months with the highest UV index?
What is the UV index intensity in September in Westchester?
Average temperature in September
Westchester, FL
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is January (73.9°F).
- Average low temperature in September: 79.7°F
The month with the highest average low temperature is August (81.7°F).
The coldest month (with the lowest average low temperature) is January (62.4°F).
Average pressure in September
Westchester, FL
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.95"Hg).
Average wind speed in September
Westchester, FL
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is March (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Westchester, FL
- Average humidity in September: 72%
The month with the highest relative humidity is December (74%).
The month with the lowest relative humidity is March (67%).
Average rainfall in September
Westchester, FL
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is August (1.42").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in September
Westchester, FL
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is December (4.7 days).
Average snowfall days in September
Westchester, FL
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Westchester, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
Westchester, FL
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in September
Westchester, FL
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in September
Westchester, FL
- Average cloud cover in September: 28
The month with the most cloud cover is October (Cloud cover 33).
The month with the least cloud cover is April (Cloud cover 25).
Average visibility in September
Westchester, FL
- 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, Florida, USA
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