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
Jasper experiences an average high-temperature of a still hot 88.2°F (31.2°C) with the onset of September, subtly varied from August's 91.6°F (33.1°C). In Jasper, the expected average low-temperature for September is a pleasant 70.5°F (21.4°C).Heat index
The heat index for September is estimated at a blisteringly hot 104°F (40°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
The average relative humidity in September is 76%.Rainfall
In Jasper, in September, during 16.7 rainfall days, 2.32" (59mm) of precipitation is typically accumulated. In Jasper, during the entire year, the rain falls for 160.1 days and collects up to 24.49" (622mm) of precipitation.Snowfall
March through December are months without snowfall.Daylight
The average length of the day in September is 12h and 20min.On the first day of September in Jasper, sunrise is at 7:08 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:17 pm EDT.
Sunshine
In Jasper, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Jasper have in September?
What is the UV index reading in September?
Average temperature in September
Jasper, FL
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (61.7°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (43.2°F).
Average pressure in September
Jasper, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Jasper, FL
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Jasper, FL
- Average humidity in September: 76%
The months with the highest relative humidity are August and December (77%).
The months with the lowest relative humidity are April and May (70%).
Average rainfall in September
Jasper, FL
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is November (0.98").
Average rainfall days in September
Jasper, FL
- Average rainfall days in September: 16.7 days
The month with the highest number of rainy days is August (22.7 days).
The month with the least rainy days is November (6.6 days).
Average snowfall days in September
Jasper, FL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Jasper, FL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Jasper, FL
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is August (5.5 days).
Average UV index in September
Jasper, FL
- Average UV index in September: 6
The 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 3).
Average cloud cover in September
Jasper, FL
- Average cloud cover in September: 35
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 31).
Average visibility in September
Jasper, FL
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, October and November (6mi).
The months with the lowest visibility are September and December (5mi).
Jasper, Florida, USA
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