September weather forecast
Francis, FL

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Weather in September

September, the first month of the autumn in Francis, is still a hot month, with an average temperature fluctuating between 88.5°F (31.4°C) and 73°F (22.8°C).

Temperature

The transition from August to September sees average high-temperatures adjusting to a still tropical 88.5°F (31.4°C), from a not significantly different 91.9°F (33.3°C). During September, Francis records a consistent average nighttime temperature of 73°F (22.8°C).

Heat index

The heat index in September is estimated at a scorching 105.8°F (41°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The months with the highest humidity are August, September and December, with an average relative humidity of 77%.

Rainfall

In Francis, in September, it is raining for 15.2 days, with typically 1.18" (30mm) of accumulated precipitation. Throughout the year, there are 138.3 rainfall days, and 12.76" (324mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Daylight

In Francis, the average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 7:05 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:14 pm EDT.

Sunshine

In September, the average sunshine is 8.5h.

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 unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 6 during September leads to these advisories:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

During September, Francis experiences an average high-temperature of 88.5°F (31.4°C) and a low-temperature of 73°F (22.8°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 105.8°F (41°C).

What is the most humid month?

August, September and December, with an average relative humidity of 77%, are most humid months.

What is the average humidity in September?

In September, the average relative humidity is 77%.

How much does it rain in September?

In Francis, during September, the rain falls for 15.2 days and regularly aggregates up to 1.18" (30mm) of precipitation.

When it does not snow?

February through December are months without snowfall.

How many hours of daylight does Francis have in September?

The average day length in September is 12h and 20min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 7:05 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:14 pm EDT.

How many hours of sunshine does Francis have in September?

In Francis, the average sunshine duration in September is 8.5h.

What is the UV index intensity in September?

The average daily maximum UV index in September in Francis is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Francis, FL

Average temperature in September - Francis, FL
  • Average high temperature in September: 88.5°F

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (65.8°F).

  • Average low temperature in September: 73°F

The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (48.2°F).

Average pressure in September
Francis, FL

Average pressure in September - Francis, 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).

Average wind speed in September
Francis, FL

Average wind speed in September - Francis, FL
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).

Average humidity in September
Francis, FL

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

The months with the highest relative humidity are August, September and December (77%).
The month with the lowest relative humidity is March (70%).

Average rainfall in September
Francis, FL

Average rainfall in September - Francis, FL
  • Average rainfall in September: 1.18"

The wettest month (with the highest rainfall) is July (2.09").
The driest month (with the least rainfall) is March (0.47").

Average rainfall days in September
Francis, FL

Average rainfall days in September - Francis, FL
  • Average rainfall days in September: 15.2 days

The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is November (6.7 days).

Average snowfall days in September
Francis, FL

Average snowfall days in September - Francis, 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).

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

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

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in September: 8h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

Average sunshine days in September
Francis, FL

Average sunshine days in September - Francis, FL
  • Average sunshine days in September: 12.1 days

The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is June (9.3 days).

Average UV index in September
Francis, FL

Average UV index in September - Francis, 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).

Average cloud cover in September
Francis, FL

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

The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and July (Cloud cover 30).

Average visibility in September
Francis, FL

Average visibility in September - Francis, 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).

Francis, Florida, USA

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