September weather forecast
Dunnellon, FL

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Weather in September

The first month of the autumn, September, is still a hot month in Dunnellon, Florida, with temperature in the range of an average low of 74.3°F (23.5°C) and an average high of 87.1°F (30.6°C).

Temperature

Dunnellon records an average high-temperature of a still hot 87.1°F (30.6°C) as September arrives, nearly mirroring the previous month's climate. In Dunnellon, in September, the average low-temperature is a moderately hot 74.3°F (23.5°C).

Heat index

For most parts of September, the heat index is computed to be a very hot 102.2°F (39°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Research indicates the heat index considers values in shaded locales and with light winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

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

Rainfall

In Dunnellon, during September, the rain falls for 21.4 days and regularly aggregates up to 3.54" (90mm) of precipitation. In Dunnellon, during the entire year, the rain falls for 178.4 days and collects up to 34.06" (865mm) of precipitation.

Snowfall

In Dunnellon, Florida, snow does not fall in February through December.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September, sunrise is at 7:07 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:16 pm EDT.

Sunshine

The average sunshine in September is 8.9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.

Frequently asked questions

Is it hot during September?

The average high-temperature, in September, in Dunnellon, is 87.1°F (30.6°C), while the average low-temperature is 74.3°F (23.5°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 102.2°F (39°C).

What is the most humid month?

The most humid month is September, with an average relative humidity of 78%.

What is the average humidity in September?

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

How much does it rain in Dunnellon in September?

In Dunnellon, in September, it is raining for 21.4 days, with typically 3.54" (90mm) of accumulated precipitation.

When it does not snow?

February through December are months without snowfall.

How many hours of daylight does Dunnellon have in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 7:07 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:16 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.9h.

What is the month with the highest UV index?

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

What is the UV index intensity in September?

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

Average temperature in September - Dunnellon, FL
  • Average high temperature in September: 87.1°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 (65.3°F).

  • Average low temperature in September: 74.3°F

The month with the highest average low temperature is August (77.2°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).

Average pressure in September
Dunnellon, FL

Average pressure in September - Dunnellon, 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
Dunnellon, FL

Average wind speed in September - Dunnellon, FL
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are March and April (7.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

Average humidity in September
Dunnellon, FL

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

The month with the highest relative humidity is September (78%).
The months with the lowest relative humidity are January, March and May (73%).

Average rainfall in September
Dunnellon, FL

Average rainfall in September - Dunnellon, FL
  • Average rainfall in September: 3.54"

The wettest month (with the highest rainfall) is August (5.51").
The driest month (with the least rainfall) is March (1.26").

Average rainfall days in September
Dunnellon, FL

Average rainfall days in September - Dunnellon, FL
  • Average rainfall days in September: 21.4 days

The month with the highest number of rainy days is August (26.9 days).
The month with the least rainy days is November (8.7 days).

Average snowfall days in September
Dunnellon, FL

Average snowfall days in September - Dunnellon, 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
Dunnellon, FL

Average daylight in September / Average sunshine in September - Dunnellon, 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 5min

The month with the most sunshine is May (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

Average sunshine days in September
Dunnellon, FL

Average sunshine days in September - Dunnellon, FL
  • Average sunshine days in September: 6.2 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is August (2.1 days).

Average UV index in September
Dunnellon, FL

Average UV index in September - Dunnellon, 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).

Average cloud cover in September
Dunnellon, FL

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

The months with the most cloud cover are February and December (Cloud cover 34).
The month with the least cloud cover is May (Cloud cover 24).

Average visibility in September
Dunnellon, FL

Average visibility in September - Dunnellon, 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).

Dunnellon, Florida, USA

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