September weather forecast
New Port Richey, FL

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Weather in September

September, the first month of the autumn in New Port Richey, is still a tropical month, with an average temperature varying between 86.4°F (30.2°C) and 77°F (25°C).

Temperature

As August turns into September, the average high-temperatures rest at a still tropical 86.4°F (30.2°C), showing a minor variation from the prior month. New Port Richey anticipates an average minimum temperature of 77°F (25°C) in the month of September.

Heat index

The heat index value for September is computed to be a sweltering 98.6°F (37°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. 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. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In New Port Richey, in September, during 20.4 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. In New Port Richey, Florida, during the entire year, the rain falls for 164 days and collects up to 26.57" (675mm) of precipitation.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September in New Port Richey, sunrise is at 7:09 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:17 pm EDT.

Sunshine

The average sunshine in September in New Port Richey is 9.2h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in New Port Richey. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Frequently asked questions

Is it hot in New Port Richey during September?

New Port Richey in September has an average high-temperature of 86.4°F (30.2°C) and an average low-temperature of 77°F (25°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 98.6°F (37°C).

What is the average humidity in September in New Port Richey?

In New Port Richey, the average relative humidity in September is 76%.

How many days does it rain in September in New Port Richey?

In New Port Richey, Florida, in September, it is raining for 20.4 days, with typically 2.95" (75mm) of accumulated precipitation.

How many hours of daylight does New Port Richey have in September?

The average day length in September in New Port Richey is 12h and 19min.

When is the sunrise / sunset in September in New Port Richey?

On the first day of September in New Port Richey, sunrise is at 7:09 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:17 pm EDT.

How many hours of sunshine does New Port Richey have in September?

In New Port Richey, Florida, the average sunshine duration in September is 9.2h.

When is the highest UV index in New Port Richey?

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

How high is the UV index in September in New Port Richey?

The average daily maximum UV index in September in New Port Richey is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
New Port Richey, FL

Average temperature in September - New Port Richey, FL
  • Average high temperature in September: 86.4°F

The warmest month (with the highest average high temperature) is August (88.2°F).
The month with the lowest average high temperature is January (65.8°F).

  • Average low temperature in September: 77°F

The month with the highest average low temperature is August (79.5°F).
The coldest month (with the lowest average low temperature) is January (53.8°F).

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Average pressure in September
New Port Richey, FL

Average pressure in September - New Port Richey, FL
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).

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Average wind speed in September
New Port Richey, FL

Average wind speed in September - New Port Richey, FL
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in September
New Port Richey, FL

Average humidity in September - New Port Richey, FL
  • Average humidity in September: 76%

The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January, March and May (73%).

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Average rainfall in September
New Port Richey, FL

Average rainfall in September - New Port Richey, FL
  • Average rainfall in September: 2.95"

The wettest months (with the highest rainfall) are July and August (4.76").
The driest months (with the least rainfall) are March and November (0.91").

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Average rainfall days in September
New Port Richey, FL

Average rainfall days in September - New Port Richey, FL
  • Average rainfall days in September: 20.4 days

The month with the highest number of rainy days is July (24.9 days).
The month with the least rainy days is November (6.9 days).

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Average daylight in September /
Average sunshine in September
New Port Richey, FL

Average daylight in September / Average sunshine in September - New Port Richey, 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 and 1min

The month with the most sunshine is May (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).

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Average sunshine days in September
New Port Richey, FL

Average sunshine days in September - New Port Richey, FL
  • Average sunshine days in September: 7.4 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (4.3 days).

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Average UV index in September
New Port Richey, FL

Average UV index in September - New Port Richey, 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
New Port Richey, FL

Average cloud cover in September - New Port Richey, FL
  • Average cloud cover in September: 26

The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 20).

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Average visibility in September
New Port Richey, FL

Average visibility in September - New Port Richey, 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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New Port Richey, Florida, USA

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