September weather forecast
Lisbon, FL

Weather in September

September, the first month of the autumn, in Lisbon, is still a hot month, with temperature in the range of an average high of 88.2°F (31.2°C) and an average low of 73.2°F (22.9°C).

Temperature

In Lisbon, the average high-temperature in September is almost the same as in August - a still tropical 88.2°F (31.2°C). In Lisbon, in September, the average low-temperature is 73.2°F (22.9°C).

Heat index

The average heat index is appraised at a scorching 105.4°F (40.8°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, metabolic differences, wind, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

Months with the highest humidity in Lisbon are July through September, with an average relative humidity of 78%.

Rainfall

In Lisbon, during September, the rain falls for 23.5 days and regularly aggregates up to 4.09" (104mm) of precipitation. In Lisbon, during the entire year, the rain falls for 200.1 days and collects up to 39.06" (992mm) of precipitation.

Daylight

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

Sunshine

In Lisbon, Florida, the average sunshine is 8.8h.

UV index

The average daily maximum UV index in Lisbon is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV rays for average individuals.
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. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
[Resources]

FAQ

What is the temperature in September in Lisbon?

The average high-temperature, in September, in Lisbon, is 88.2°F (31.2°C), while the average low-temperature is 73.2°F (22.9°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 105.4°F (40.8°C).

What is the most humid month in Lisbon?

Months with the highest humidity are July through September, with an average relative humidity of 78%.

What is the average humidity in September in Lisbon?

The average relative humidity in September in Lisbon is 78%.

How many days does it rain in September in Lisbon?

In Lisbon, in September, during 23.5 rainfall days, 4.09" (104mm) of precipitation is typically accumulated.

How many hours of daylight does Lisbon have in September?

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

How many hours of sunshine does Lisbon have in September?

The average sunshine in September in Lisbon is 8.8h.

What is the UV index reading in September in Lisbon?

In Lisbon, Florida, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Lisbon, FL

Average temperature in September - Lisbon, FL
  • Average high temperature in September: 88.2°F

The warmest month (with the highest average high temperature) is August (90.7°F).
The month with the lowest average high temperature is January (67.1°F).

  • Average low temperature in September: 73.2°F

The month with the highest average low temperature is August (75.6°F).
The coldest month (with the lowest average low temperature) is January (49.6°F).

[Resources]

Average pressure in September
Lisbon, FL

Average pressure in September - Lisbon, FL
  • Average pressure in September: 29.97"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is September (29.97").

[Resources]

Average wind speed in September
Lisbon, FL

Average wind speed in September - Lisbon, FL
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

[Resources]

Average humidity in September
Lisbon, FL

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

Months with the highest relative humidity are July, August and September (78%).
The month with the lowest relative humidity is March (71%).

[Resources]

Average rainfall in September
Lisbon, FL

Average rainfall in September - Lisbon, FL
  • Average rainfall in September: 4.09"

The wettest month (with the highest rainfall) is July (6.77").
The driest month (with the least rainfall) is November (1.34").

[Resources]

Average rainfall days in September
Lisbon, FL

Average rainfall days in September - Lisbon, FL
  • Average rainfall days in September: 23.5 days

The month with the highest number of rainy days is August (28.6 days).
The month with the least rainy days is November (9.3 days).

[Resources]

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

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

The month with the longest days is June (Average daylight: 14h).
The month with the shortest days is December (Average daylight: 10.3h).

  • Average sunshine in September: 8.8h

Months with the most sunshine are May and July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 6.1h).

[Resources]

Average sunshine days in September
Lisbon, FL

Average sunshine days in September - Lisbon, FL
  • Average sunshine days in September: 4.6 days

Months with the most sunshine days are January and December (19.3 days).
The month with the least sunshine days is August (1 days).

[Resources]

Average UV index in September
Lisbon, FL

Average UV index in September - Lisbon, FL
  • Average UV index in September: 6

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

[Resources]

Average cloud cover in September
Lisbon, FL

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

The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 28).

[Resources]

Average visibility in September
Lisbon, FL

Average visibility in September - Lisbon, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location