September weather forecast
Killarney, FL

Weather in September

September, the first month of the autumn in Killarney, is also a hot month, with an average temperature fluctuating between 74.1°F (23.4°C) and 88.7°F (31.5°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still hot 88.7°F (31.5°C). In September, the average low-temperature is 74.1°F (23.4°C).

Heat index

The average heat index in September is estimated at an extremely hot 107.2°F (41.8°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. 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 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, pregnancy), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise 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 cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

September is the most humid month in Killarney, with an average relative humidity of 78%.

Rainfall

In Killarney, Florida, in September, it is raining for 24.6 days, with typically 4.72" (120mm) of accumulated precipitation. Throughout the year, there are 205.7 rainfall days, and 41.1" (1044mm) of precipitation is accumulated.

Snowfall

In Killarney, snow does not fall in February through December.

Daylight

In Killarney, the average length of the day in September is 12h and 19min.
On the first day of September in Killarney, sunrise is at 7:04 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:13 pm EDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
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.
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FAQ

What is the temperature in September in Killarney?

In Killarney, Florida, in September, the average high-temperature is 88.7°F (31.5°C), and the average low-temperature is 74.1°F (23.4°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is estimated at 107.2°F (41.8°C).

What is the most humid month in Killarney?

With an average relative humidity of 78%, September is the most humid month in Killarney, Florida.

What is the average humidity in September in Killarney?

In September, the average relative humidity in Killarney is 78%.

How many days does it rain in September in Killarney?

In September, in Killarney, Florida, the rain falls for 24.6 days. Throughout September, 4.72" (120mm) of precipitation is accumulated.

When it does not snow in Killarney?

In Killarney, snow does not fall in February through December.

What is the average length of the day in September in Killarney?

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

What time are sunrise and sunset in September in Killarney?

In September, on the first day of the month, sunrise is at 7:04 am and sunset at 7:48 pm. On the last day of the month, in Killarney, Florida, sunrise is at 7:19 am and sunset at 7:13 pm EDT.

How many hours of sunshine does Killarney have in September?

In September, the average sunshine duration in Killarney, Florida, is 8.6h.

What is the UV index intensity in September in Killarney?

The average daily maximum UV index in September in Killarney, Florida, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability 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
Killarney, FL

Average temperature in September - Killarney, FL
  • Average high temperature in September: 88.7°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (67.6°F).

  • Average low temperature in September: 74.1°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 (50.4°F).

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Average pressure in September
Killarney, FL

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

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

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Average wind speed in September
Killarney, FL

Average wind speed in September - Killarney, FL
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

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Average humidity in September
Killarney, FL

Average humidity in September - Killarney, FL
  • Average humidity in September: 78%

The month with the highest relative humidity is September (78%).
The month with the lowest relative humidity is March (71%).

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Average rainfall in September
Killarney, FL

Average rainfall in September - Killarney, FL
  • Average rainfall in September: 4.72"

The wettest month (with the highest rainfall) is July (6.81").
The driest months (with the least rainfall) are January and March (1.5").

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Average rainfall days in September
Killarney, FL

Average rainfall days in September - Killarney, FL
  • Average rainfall days in September: 24.6 days

The month with the highest number of rainy days is August (28.4 days).
The month with the least rainy days is January (9.8 days).

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Average snowfall days in September
Killarney, FL

Average snowfall days in September - Killarney, 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).

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

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

The month with the longest days is June (Average daylight: 13h and 56min).
The month with the shortest days is December (Average daylight: 10h and 22min).

  • Average sunshine in September: 8h and 36min

The months with the most sunshine are May and July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).

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Average sunshine days in September
Killarney, FL

Average sunshine days in September - Killarney, FL
  • Average sunshine days in September: 3.7 days

The month with the most sunshine days is January (18.1 days).
The month with the least sunshine days is August (1.3 days).

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Average UV index in September
Killarney, FL

Average UV index in September - Killarney, FL
  • Average UV index in September: 6

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 4).

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Average cloud cover in September
Killarney, FL

Average cloud cover in September - Killarney, FL
  • Average cloud cover in September: 33

The months with the most cloud cover are January and February (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 29).

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Average visibility in September
Killarney, FL

Average visibility in September - Killarney, 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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