September weather forecast
Weston, FL

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Weather in September

In September, there is a notable decrease in the average temperature in Weston, indicating the retreat of summer. The city starts receiving less daylight compared to August, signaling an onset of autumn. Brief spells of shower become frequent, and the total rainfall decreases to 0.31" (8mm). The prevalent wind speed of 7.4mph (11.9km/h) brings a crispness to the air, serving as a subtle alert of approaching fall. While the scorching heat lessens, the sun continues to shine brightly for up to 9.1 hours daily, maintaining the city's vibrant ambiance.

Temperature

Weston's September showcases an average high-temperature of a still hot 86.7°F (30.4°C), hardly distinct from August's 89.2°F (31.8°C). Throughout September, a modest shift from daytime highs is anticipated, with an average low-temperature of 79.5°F (26.4°C).

Heat index

The heat index value during September is calculated to be a fiery hot 98.6°F (37°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. 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 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In September, the average relative humidity is 73%.

Rainfall

In September, the rain falls for 10 days. Throughout September, 0.31" (8mm) of precipitation is accumulated. Throughout the year, there are 78.9 rainfall days, and 5.75" (146mm) of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 18min.
On the first day of the month, sunrise is at 7:01 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:13 am and sunset at 7:08 pm EDT.

Sunshine

In September, the average sunshine is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Updated: Aug 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

In Weston, 86.7°F (30.4°C) is the average high-temperature and 79.5°F (26.4°C) is the average low-temperature during September. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which combines air temperature and relative humidity, in September is calculated to be 98.6°F (37°C).

What is the average humidity in September?

In September, the average relative humidity is 73%.

How much does it rain in September?

In Weston, during September, the rain falls for 10 days and regularly aggregates up to 0.31" (8mm) of precipitation.

How many hours of daylight does Weston have in September?

The average day length in September is 12h and 18min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:01 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:08 pm EDT.

How long on average sun shines in September?

In Weston, the average sunshine duration in September is 9.1h.

What are the months with the highest UV index?

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

What is the UV index intensity in September?

In September, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health 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
Weston, FL

Average temperature in September - Weston, FL
  • Average high temperature in September: 86.7°F

The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is January (73.4°F).

  • Average low temperature in September: 79.5°F

The month with the highest average low temperature is August (81.9°F).
The coldest month (with the lowest average low temperature) is January (62.6°F).

Average pressure in September
Weston, FL

Average pressure in September - Weston, FL
  • Average pressure in September: 29.95"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.95"Hg).

Average wind speed in September
Weston, FL

Average wind speed in September - Weston, FL
  • Average wind speed in September: 7.4mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest month (with the lowest average wind speed) is July (7mph).

Average humidity in September
Weston, FL

Average humidity in September - Weston, FL
  • Average humidity in September: 73%

The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (68%).

Average rainfall in September
Weston, FL

Average rainfall in September - Weston, FL
  • Average rainfall in September: 0.31"

The wettest month (with the highest rainfall) is August (0.98").
The driest month (with the least rainfall) is January (0.16").

Average rainfall days in September
Weston, FL

Average rainfall days in September - Weston, FL
  • Average rainfall days in September: 10 days

The month with the highest number of rainy days is August (10.9 days).
The month with the least rainy days is January (3.5 days).

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

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

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

Average sunshine days in September
Weston, FL

Average sunshine days in September - Weston, FL
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is December (27.1 days).
The month with the least sunshine days is July (11.5 days).

Average UV index in September
Weston, FL

Average UV index in September - Weston, 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 months with the lowest UV index are January and December (UV index 5).

Average cloud cover in September
Weston, FL

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

The month with the most cloud cover is October (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 25).

Average visibility in September
Weston, FL

Average visibility in September - Weston, 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).

Weston, Florida, USA

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