September weather forecast
Dover, FL

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Weather in September

September, the first month of the autumn in Dover, is also a hot month, with an average temperature varying between 73.9°F (23.3°C) and 88.3°F (31.3°C).

Temperature

The arrival of September coincides with an average high-temperature of a still tropical 88.3°F (31.3°C), indicating a minimal shift from August's 90.1°F (32.3°C). Dover anticipates an average minimum temperature of 73.9°F (23.3°C) in the month of September.

Heat index

Throughout September, the heat index is estimated at a scorching 105.8°F (41°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

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

Rainfall

In Dover, during September, the rain falls for 23 days and regularly aggregates up to 4.45" (113mm) of precipitation. Throughout the year, there are 192.2 rainfall days, and 37.91" (963mm) of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:49 pm. On the last day of September, in Dover, sunrise is at 7:21 am and sunset at 7:15 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

The months with the highest UV index in Dover are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during September leads to these advisories:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
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Frequently asked questions

How hot does it get in Dover in September?

In Dover, in September, the average high-temperature is 88.3°F (31.3°C), and the average low-temperature is 73.9°F (23.3°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in September is estimated at 105.8°F (41°C).

What is the most humid month in Dover?

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

What is the average humidity in September in Dover?

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

How many days does it rain in September in Dover?

In Dover, Florida, during September, the rain falls for 23 days and regularly aggregates up to 4.45" (113mm) of precipitation.

How many hours of daylight does Dover have in September?

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

What time are sunrise and sunset in September in Dover?

In September, on the first day of the month, sunrise is at 7:07 am and sunset at 7:49 pm. On the last day of the month, in Dover, Florida, sunrise is at 7:21 am and sunset at 7:15 pm EDT.

How long on average sun shines in September in Dover?

In September, the average sunshine duration in Dover is 8.8h.

What is the month with the highest UV index in Dover?

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

What is the UV index reading in September in Dover?

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 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
Dover, FL

Average temperature in September - Dover, FL
  • Average high temperature in September: 88.3°F

The warmest month (with the highest average high temperature) is August (90.1°F).
The month with the lowest average high temperature is January (68.9°F).

  • Average low temperature in September: 73.9°F

The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (51.8°F).

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Average pressure in September
Dover, FL

Average pressure in September - Dover, 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).

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Average wind speed in September
Dover, FL

Average wind speed in September - Dover, FL
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is March (6.9mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).

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Average humidity in September
Dover, FL

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

The month with the highest relative humidity is September (78%).
The months with the lowest relative humidity are March and May (71%).

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Average rainfall in September
Dover, FL

Average rainfall in September - Dover, FL
  • Average rainfall in September: 4.45"

The wettest month (with the highest rainfall) is August (6.93").
The driest month (with the least rainfall) is February (1.22").

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Average rainfall days in September
Dover, FL

Average rainfall days in September - Dover, FL
  • Average rainfall days in September: 23 days

The month with the highest number of rainy days is August (27.3 days).
The month with the least rainy days is February (8.8 days).

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

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

The month with the most sunshine is May (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).

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Average sunshine days in September
Dover, FL

Average sunshine days in September - Dover, FL
  • Average sunshine days in September: 5.1 days

The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (2.7 days).

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Average UV index in September
Dover, FL

Average UV index in September - Dover, 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
Dover, FL

Average cloud cover in September - Dover, FL
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 35).
The month with the least cloud cover is May (Cloud cover 26).

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Average visibility in September
Dover, FL

Average visibility in September - Dover, 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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Dover, Florida, USA

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