September weather forecast
Courtenay, FL

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Weather in September

September, the first month of the autumn in Courtenay, is also a moderately hot month, with an average temperature fluctuating between 78.3°F (25.7°C) and 84.2°F (29°C).

Temperature

The initiation of September records an average high-temperature of a warm 84.2°F (29°C), displaying a near consistency with the previous month. Courtenay, during the September nights, maintains an average temperature of 78.3°F (25.7°C), closely aligned with its daytime readings.

Heat index

September's mean heat index is evaluated at a hot 93.2°F (34°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

The average relative humidity in September is 77%.

Rainfall

In Courtenay, during September, the rain falls for 23.8 days and regularly aggregates up to 4.84" (123mm) of precipitation. In Courtenay, during the entire year, the rain falls for 204.7 days and collects up to 36.57" (929mm) of precipitation.

Daylight

In Courtenay, Florida, the average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:01 am and sunset at 7:43 pm. On the last day of September, in Courtenay, sunrise is at 7:15 am and sunset at 7:09 pm EDT.

Sunshine

The average sunshine in September in Courtenay is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

How hot is it in Courtenay in September?

The average high-temperature and low-temperature in Courtenay, Florida, during September are 84.2°F (29°C) and 78.3°F (25.7°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines relative humidity and air temperature, in September is evaluated at 93.2°F (34°C).

What is the average humidity in September in Courtenay?

In Courtenay, the average relative humidity in September is 77%.

How many days does it rain in September in Courtenay?

In September, in Courtenay, the rain falls for 23.8 days. Throughout September, 4.84" (123mm) of precipitation is accumulated.

How many hours of daylight does Courtenay have in September?

In Courtenay, Florida, the average day length in September is 12h and 19min.

What time are sunrise and sunset in September in Courtenay?

In September, on the first day of the month, sunrise is at 7:01 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:09 pm EDT.

How long on average sun shines in September in Courtenay?

The average sunshine duration in September is 9h.

What is the month with the highest UV index in Courtenay?

The months with the highest UV index in Courtenay, Florida, are May through September, with an average maximum UV index of 7.

What is the UV index intensity in September in Courtenay?

In Courtenay, Florida, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Courtenay, FL

Average temperature in September - Courtenay, FL
  • Average high temperature in September: 84.2°F

The warmest month (with the highest average high temperature) is August (86°F).
The month with the lowest average high temperature is January (68.4°F).

  • Average low temperature in September: 78.3°F

The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (59.4°F).

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Average pressure in September
Courtenay, FL

Average pressure in September - Courtenay, FL
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

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Average wind speed in September
Courtenay, FL

Average wind speed in September - Courtenay, FL
  • Average wind speed in September: 8.9mph

The windiest month (with the highest average wind speed) is November (11.5mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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Average humidity in September
Courtenay, FL

Average humidity in September - Courtenay, FL
  • Average humidity in September: 77%

The months with the highest relative humidity are June, July and August (79%).
The month with the lowest relative humidity is March (72%).

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Average rainfall in September
Courtenay, FL

Average rainfall in September - Courtenay, FL
  • Average rainfall in September: 4.84"

The wettest month (with the highest rainfall) is August (6.34").
The driest month (with the least rainfall) is March (1.22").

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Average rainfall days in September
Courtenay, FL

Average rainfall days in September - Courtenay, FL
  • Average rainfall days in September: 23.8 days

The month with the highest number of rainy days is August (25.7 days).
The month with the least rainy days is February (10.3 days).

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Average daylight in September /
Average sunshine in September
Courtenay, FL

Average daylight in September / Average sunshine in September - Courtenay, FL
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 6h).

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Average sunshine days in September
Courtenay, FL

Average sunshine days in September - Courtenay, FL
  • Average sunshine days in September: 4.1 days

The month with the most sunshine days is March (16.6 days).
The month with the least sunshine days is August (3.3 days).

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Average UV index in September
Courtenay, FL

Average UV index in September - Courtenay, 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 4).

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Average cloud cover in September
Courtenay, FL

Average cloud cover in September - Courtenay, FL
  • Average cloud cover in September: 29

The months with the most cloud cover are January and November (Cloud cover 35).
The months with the least cloud cover are April and May (Cloud cover 26).

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Average visibility in September
Courtenay, FL

Average visibility in September - Courtenay, 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).

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Courtenay, Florida, USA

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