September weather forecast
Cedar Key, FL

Weather in September

The first month of the autumn, September, is still a tropical month in Cedar Key, Florida, with an average temperature fluctuating between 87.3°F (30.7°C) and 72.9°F (22.7°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still tropical 87.3°F (30.7°C). The average low-temperature, in September, is 72.9°F (22.7°C).

Heat index

In September, the average heat index is evaluated at a torrid 102.2°F (39°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, clothing, wind), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

September is the most humid month, with an average relative humidity of 77%.

Rainfall

In September, the rain falls for 18.7 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. In Cedar Key, during the entire year, the rain falls for 154 days and collects up to 21.69" (551mm) of precipitation.

Snowfall

January through November are months without snowfall in Cedar Key, Florida.

Ocean temperature

In Cedar Key, the average seawater temperature in September is 83.8°F (28.8°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September in Cedar Key, sunrise is at 7:09 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:19 pm EDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Cedar Key?

In September, in Cedar Key, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 72.9°F (22.7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines air temperature and relative humidity, in September is evaluated at 102.2°F (39°C).

What is the most humid month in Cedar Key?

The most humid month is September, with an average relative humidity of 77%.

What is the average humidity in September in Cedar Key?

The average relative humidity in September in Cedar Key is 77%.

How many days does it rain in September in Cedar Key?

In Cedar Key, during September, the rain falls for 18.7 days and regularly aggregates up to 1.85" (47mm) of precipitation.

When it does not snow in Cedar Key?

January through November are months without snowfall.

What is the water temperature in September in Cedar Key?

In Cedar Key, Florida, the average seawater temperature in September is 83.8°F (28.8°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in Cedar Key?

The average day length in September in Cedar Key is 12h and 19min.

What time are sunrise and sunset in September in Cedar Key?

In September, on the first day of the month, sunrise is at 7:09 am and sunset at 7:54 pm. On the last day of the month, in Cedar Key, Florida, sunrise is at 7:24 am and sunset at 7:19 pm EDT.

How long on average sun shines in September in Cedar Key?

In September, the average sunshine duration in Cedar Key is 8.6h.

What is the UV index reading in September in Cedar Key?

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

Average temperature in September
Cedar Key, FL

Average temperature in September - Cedar Key, FL
  • Average high temperature in September: 87.3°F

The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is January (64°F).

  • Average low temperature in September: 72.9°F

The month with the highest average low temperature is August (76.5°F).
The coldest month (with the lowest average low temperature) is January (47.7°F).

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Average pressure in September
Cedar Key, FL

Average pressure in September - Cedar Key, 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).

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Average wind speed in September
Cedar Key, FL

Average wind speed in September - Cedar Key, FL
  • Average wind speed in September: 5.4mph

The windiest months (with the highest average wind speed) are January, February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in September
Cedar Key, FL

Average humidity in September - Cedar Key, FL
  • Average humidity in September: 77%

The month with the highest relative humidity is September (77%).
The month with the lowest relative humidity is January (71%).

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Average rainfall in September
Cedar Key, FL

Average rainfall in September - Cedar Key, FL
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is November (0.83").

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Average rainfall days in September
Cedar Key, FL

Average rainfall days in September - Cedar Key, FL
  • Average rainfall days in September: 18.7 days

The month with the highest number of rainy days is July (22.8 days).
The month with the least rainy days is November (6.6 days).

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Average snowfall days in September
Cedar Key, FL

Average snowfall days in September - Cedar Key, FL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in September
Cedar Key, FL

Average sea temperature in September - Cedar Key, FL
  • Average sea temperature in September: 83.8°F

The best month for swimming (with the highest average sea temperature) is August (86.4°F).
The coldest month (with the lowest average sea temperature) is January (58.4°F).

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Average daylight in September /
Average sunshine in September
Cedar Key, FL

Average daylight in September / Average sunshine in September - Cedar Key, FL
  • Average daylight in September: 12h and 19min

The month with the longest days is June (Average daylight: 13h and 59min).
The month with the shortest days is December (Average daylight: 10h and 19min).

  • Average sunshine in September: 8h and 36min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in September
Cedar Key, FL

Average sunshine days in September - Cedar Key, FL
  • Average sunshine days in September: 8.8 days

The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is July (5.8 days).

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Average UV index in September
Cedar Key, FL

Average UV index in September - Cedar Key, 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).

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Average cloud cover in September
Cedar Key, FL

Average cloud cover in September - Cedar Key, FL
  • Average cloud cover in September: 31

The months with the most cloud cover are February and December (Cloud cover 36).
The month with the least cloud cover is May (Cloud cover 25).

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Average visibility in September
Cedar Key, FL

Average visibility in September - Cedar Key, 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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