September weather forecast and climate
Bay Harbor, FL

The first month of the autumn, September, is still a warm month in Bay Harbor, Florida, with average temperature varying between 85.1°F (29.5°C) and 75.4°F (24.1°C).

Temperature

In Bay Harbor, Florida, the average high-temperature is essentially the same as in August - a warm 85.1°F (29.5°C). In Bay Harbor, Florida, in September, the average low-temperature is 75.4°F (24.1°C).

Heat index

In September, the average heat index is appraised at a hot 94.5°F (34.7°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, pregnancy, clothing, and wind affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Bay Harbor, the average relative humidity in September is 74%.

Rainfall

In Bay Harbor, in September, it is raining for 18 days, with typically 3.15" (80mm) of accumulated precipitation. Throughout the year, in Bay Harbor, Florida, there are 164.8 rainfall days, and 36.77" (934mm) of precipitation is accumulated.

Daylight

The average length of the day in September is 12.3h.

Sunshine

The average sunshine in September is 9.2h.

UV index

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for the average person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Bay Harbor?

In Bay Harbor, in September, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 75.4°F (24.1°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), that calculates temperature value influenced by the moisture in the air, is appraised at 94.5°F (34.7°C).

What is the average humidity in September in Bay Harbor?

In September, the average relative humidity in Bay Harbor is 74%.

How many days does it rain in September in Bay Harbor?

In September, the rain falls for 18 days. Throughout September, 3.15" (80mm) of precipitation is accumulated.

How many hours of daylight does Bay Harbor have in September?

In September, the average length of the day is 12.3h.

How long on average sun shines in September in Bay Harbor?

The average sunshine in September in Bay Harbor is 9.2h.

What is the UV index reading in September in Bay Harbor?

In September, the average daily maximum UV index in Bay Harbor is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Bay Harbor, FL
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is January (60.3°F).

  • Average low temperature in September: 75.4°F

Months with the highest average low temperature are July and August (79.9°F).
The coldest month (with the lowest average low temperature) is January (48.7°F).

Average pressure in September - Bay Harbor, FL
  • Average pressure in September: 29.98"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June, August and September (29.98").

Average wind speed in September - Bay Harbor, FL
  • Average wind speed in September: 7.5mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest months (with the lowest average wind speed) are August and September (7.5mph).

Average humidity in September - Bay Harbor, FL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September - Bay Harbor, FL
  • Average rainfall in September: 3.15"

The wettest month (with the highest rainfall) is August (5.47").
The driest month (with the least rainfall) is November (1.61").

Average rainfall days in September - Bay Harbor, FL
  • Average rainfall days in September: 18 days

The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is November (8.5 days).

Average daylight in September / Average sunshine in September - Bay Harbor, FL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 9.2h

Months with the most sunshine are May and June (Average sunshine: 11.1h).
Months with the least sunshine are February and December (Average sunshine: 5.7).

Average sunshine days in September - Bay Harbor, FL
  • Average sunshine days in September: 10.1 days

The month with the most sunshine days is October (20.9 days).
The month with the least sunshine days is August (5.6 days).

Average UV index in September - Bay Harbor, FL
  • Average UV index in September: 6

Months with the highest UV index are May, June, July and August (UV index 7).
Months with the lowest UV index are January, February and December (UV index 4).

Average cloud cover in September - Bay Harbor, FL
  • Average cloud cover in September: 25

The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is May (Cloud cover 21).

Average visibility in September - Bay Harbor, FL
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).