Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the onset of September, Theressa's average high-temperature clocks in at a still hot 88.2°F (31.2°C), showing a minor fluctuation from the previous month. In September, the temperature drops to an average of 72.3°F (22.4°C) at night.Heat index
The heat index value during September is estimated at an extremely hot 105.8°F (41°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
The months with the highest humidity are August and September, with an average relative humidity of 78%.Rainfall
In September, the rain falls for 21.7 days. Throughout September, 3.15" (80mm) of precipitation is accumulated. Throughout the year, there are 188.6 rainfall days, and 33.5" (851mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September in Theressa, sunrise is at 7:05 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:14 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The UV index of 6 during September leads to these advisories:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the most humid month?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Theressa?
How many hours of daylight does Theressa have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Theressa have in September?
What is the UV index reading in September?
Average temperature in September
Theressa, FL
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (64.2°F).
- Average low temperature in September: 72.3°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (46.6°F).
Average pressure in September
Theressa, 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
Theressa, FL
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in September
Theressa, FL
- Average humidity in September: 78%
The months with the highest relative humidity are August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in September
Theressa, FL
- Average rainfall in September: 3.15"
The wettest month (with the highest rainfall) is July (5.31").
The driest months (with the least rainfall) are January and November (1.5").
Average rainfall days in September
Theressa, FL
- Average rainfall days in September: 21.7 days
The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (9 days).
Average snowfall days in September
Theressa, FL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Theressa, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Theressa, FL
- Average sunshine days in September: 6.9 days
The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is July (3.6 days).
Average UV index in September
Theressa, FL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in September
Theressa, FL
- Average cloud cover in September: 34
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and October (Cloud cover 31).
Average visibility in September
Theressa, FL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).
Theressa, Florida, USA
Weather forecast for your location
2. Allow the app to use your location