September weather forecast
Winter Haven, FL

Share
The perfect night sky full of bright red clouds reflected in a scenic mirror image in the lake water below, in Winter Haven, Fl, the United States
The perfect night sky full of bright red clouds reflected in a scenic mirror image in the lake water below, in Winter Haven, Fl, the United States

Weather in September

The first month of the autumn, September, is still a hot month in Winter Haven, Florida, with an average temperature varying between 73.6°F (23.1°C) and 88°F (31.1°C).

Temperature

Winter Haven's average high-temperature in September is a still hot 88°F (31.1°C), marking an insignificant difference from the 90°F (32.2°C) of August. Winter Haven records an average low of 73.6°F (23.1°C) throughout the nights in September.

Heat index

The heat index value during September is evaluated at a scorching 105.8°F (41°C). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are highly important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. 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. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

August and September, with an average relative humidity of 79%, are the most humid months in Winter Haven.

Rainfall

In Winter Haven, in September, during 21.5 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Winter Haven, during the entire year, the rain falls for 179.3 days and collects up to 28.66" (728mm) of precipitation.

Daylight

The average length of the day in September in Winter Haven is 12h and 19min.
On the first day of September in Winter Haven, sunrise is at 7:05 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:13 pm EDT.

Sunshine

The average sunshine in September is 8.7h.

UV index

The months with the highest UV index in Winter Haven are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 during September translates into the following guidance:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. 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. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
[Resources]

Frequently asked questions

How hot is September in Winter Haven?

During September, Winter Haven experiences an average high-temperature of 88°F (31.1°C) and a low-temperature of 73.6°F (23.1°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 105.8°F (41°C).

What are the most humid months in Winter Haven?

The months with the highest humidity in Winter Haven are August and September, with an average relative humidity of 79%.

What is the average humidity in September in Winter Haven?

In September, the average relative humidity in Winter Haven, Florida, is 79%.

How many days does it rain in September in Winter Haven?

In Winter Haven, Florida, during September, the rain falls for 21.5 days and regularly aggregates up to 3.15" (80mm) of precipitation.

How many hours of daylight does Winter Haven have in September?

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

What time are sunrise and sunset in September in Winter Haven?

In September, on the first day of the month, sunrise is at 7:05 am and sunset at 7:47 pm. On the last day of the month, in Winter Haven, sunrise is at 7:19 am and sunset at 7:13 pm EDT.

How long on average sun shines in September in Winter Haven?

In September, the average sunshine duration is 8.7h.

What is the month with the highest UV index in Winter Haven?

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

What is the UV index reading in September in Winter Haven?

In September, the average daily maximum UV index in Winter Haven, Florida, is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's 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
Winter Haven, FL

Average temperature in September - Winter Haven, FL
  • Average high temperature in September: 88°F

The warmest months (with the highest average high temperature) are July and August (90°F).
The month with the lowest average high temperature is January (68.9°F).

  • Average low temperature in September: 73.6°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (51.4°F).

[Resources]

Average pressure in September
Winter Haven, FL

Average pressure in September - Winter Haven, FL
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).

[Resources]

Average wind speed in September
Winter Haven, FL

Average wind speed in September - Winter Haven, FL
  • Average wind speed in September: 5.2mph

The windiest months (with the highest average wind speed) are January and March (6.8mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).

[Resources]

Average humidity in September
Winter Haven, FL

Average humidity in September - Winter Haven, FL
  • Average humidity in September: 79%

The months with the highest relative humidity are August and September (79%).
The month with the lowest relative humidity is March (71%).

[Resources]

Average rainfall in September
Winter Haven, FL

Average rainfall in September - Winter Haven, FL
  • Average rainfall in September: 3.15"

The wettest month (with the highest rainfall) is August (5.24").
The driest months (with the least rainfall) are January and March (0.91").

[Resources]

Average rainfall days in September
Winter Haven, FL

Average rainfall days in September - Winter Haven, FL
  • Average rainfall days in September: 21.5 days

The month with the highest number of rainy days is July (25.2 days).
The month with the least rainy days is January (8 days).

[Resources]

Average daylight in September /
Average sunshine in September
Winter Haven, FL

Average daylight in September / Average sunshine in September - Winter Haven, 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: 8h and 4min

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 12min).

[Resources]

Average sunshine days in September
Winter Haven, FL

Average sunshine days in September - Winter Haven, FL
  • Average sunshine days in September: 7 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (4.2 days).

[Resources]

Average UV index in September
Winter Haven, FL

Average UV index in September - Winter Haven, 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).

[Resources]

Average cloud cover in September
Winter Haven, FL

Average cloud cover in September - Winter Haven, FL
  • Average cloud cover in September: 33

The months with the most cloud cover are January and February (Cloud cover 36).
The month with the least cloud cover is May (Cloud cover 29).

[Resources]

Average visibility in September
Winter Haven, FL

Average visibility in September - Winter Haven, 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).

[Resources]

Winter Haven, Florida, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location