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
The transition from August to September brings an average high-temperature of a still hot 87.6°F (30.9°C), barely different from August's 90.1°F (32.3°C). During the month of September, an average low-temperature of 72.3°F (22.4°C) is recorded.Heat index
For most parts of September, the heat index is computed to be a blistering 104°F (40°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.Heat index evaluations are typically in the context of light winds and shaded environments. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
The months with the highest humidity in Raleigh are July through September, with an average relative humidity of 78%.Rainfall
In Raleigh, in September, it is raining for 14.2 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 127 rainfall days, and 10.04" (255mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
In Raleigh, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 7:07 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:16 pm EDT.
Sunshine
In Raleigh, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index in Raleigh is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 6 during September translates into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What are the most humid months in Raleigh?
What is the average humidity in September?
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 Raleigh have in September?
What is the UV index reading in September in Raleigh?
Average temperature in September
Raleigh, FL
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is January (64.9°F).
- Average low temperature in September: 72.3°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).
Average pressure in September
Raleigh, FL
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in September
Raleigh, FL
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are March and April (7mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).
Average humidity in September
Raleigh, FL
- Average humidity in September: 78%
The months with the highest relative humidity are July, August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Raleigh, FL
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is July (1.73").
The driest month (with the least rainfall) is March (0.28").
Average rainfall days in September
Raleigh, FL
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (5.1 days).
Average snowfall days in September
Raleigh, FL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Raleigh, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are May and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Raleigh, FL
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is July (7.3 days).
Average UV index in September
Raleigh, FL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Raleigh, FL
- Average cloud cover in September: 33
The months with the most cloud cover are February and December (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 28).
Average visibility in September
Raleigh, 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).
Raleigh, Florida, USA
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