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 modest decline in the average high-temperature is seen during September, decreasing from a hot 87.8°F (31°C) in August to a warm 81.5°F (27.5°C). Prospect Hill's nighttime temperature in September drops to an average of 61.9°F (16.6°C).Heat index
In September, the heat index is estimated at a tropical 86°F (30°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for 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 74%.Rainfall
The month with the least rainfall in Prospect Hill is September, when the rain falls for 12.6 days and typically collects 1.81" (46mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September in Prospect Hill, sunrise is at 6:48 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 7:01 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In Prospect Hill, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 5 translates into these guidelines:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September in Prospect Hill?
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?
What time are sunrise and sunset in September?
How many hours of sunshine does Prospect Hill have in September?
How high is the UV index in September?
Average temperature in September
Prospect Hill, NC
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (46°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Prospect Hill, NC
- 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
Prospect Hill, NC
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Prospect Hill, NC
- 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
Prospect Hill, NC
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (3.35").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Prospect Hill, NC
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
Prospect Hill, NC
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Prospect Hill, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 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
Prospect Hill, NC
- 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Prospect Hill, NC
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
Prospect Hill, NC
- 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
Prospect Hill, NC
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are June and July (Cloud cover 30).
Average visibility in September
Prospect Hill, NC
- 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).
Prospect Hill, North Carolina, USA
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