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
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a hot 87.4°F (30.8°C) in August to a warm 81.9°F (27.7°C). During September, Morrisville sees a mean low-temperature of 63.9°F (17.7°C).Heat index
For September, the heat index is appraised at a tropical 87.8°F (31°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.Heat index's context suggests values are appropriate for shady areas and slight breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 quite important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
In September, the average relative humidity is 75%.Rainfall
In Morrisville, North Carolina, in September, it is raining for 12.5 days, with typically 2.36" (60mm) of accumulated precipitation. In Morrisville, during the entire year, the rain falls for 161.9 days and collects up to 31.18" (792mm) of precipitation.Snowfall
In Morrisville, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:47 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 7:00 pm EDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 5 translates into these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
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?
How much 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 Morrisville have in September?
How high is the UV index in September?
Average temperature in September
Morrisville, NC
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in September
Morrisville, NC
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Morrisville, NC
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Morrisville, NC
- Average humidity in September: 75%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
Morrisville, NC
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is October (2.17").
Average rainfall days in September
Morrisville, NC
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Morrisville, NC
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Morrisville, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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
Morrisville, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 1min
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
Morrisville, NC
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Morrisville, NC
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Morrisville, NC
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Morrisville, 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).
Morrisville, North Carolina, USA
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