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
Bristol starts September with an average high-temperature of a still tropical 87.3°F (30.7°C), a minor shift from August's 90.3°F (32.4°C). During September, the nighttime temperature in Bristol averages to a pleasant 70.2°F (21.2°C).Heat index
September's heat index is computed to be a very hot 102.2°F (39°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.Heat index details are generally centered around shaded locations and a mild breeze. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.
Humidity
September and December, with an average relative humidity of 78%, are the most humid months.Rainfall
In September, in Bristol, the rain falls for 14.3 days. Throughout September, 1.73" (44mm) of precipitation is accumulated. Throughout the year, there are 140 rainfall days, and 19.8" (503mm) of precipitation is accumulated.Snowfall
In Bristol, Florida, snow does not fall in April through December.Daylight
In Bristol, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 7:16 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:26 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 in September translates into these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
How hot does it get in Bristol in September?
What are the most humid months in Bristol?
What is the average humidity in September in Bristol?
How many days does it rain in September in Bristol?
When it does not snow in Bristol?
How many hours of daylight does Bristol have in September?
When is the sunrise / sunset in September in Bristol?
How many hours of sunshine does Bristol have in September?
What is the UV index intensity in September in Bristol?
Average temperature in September
Bristol, FL
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in September: 70.2°F
The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Bristol, FL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in September
Bristol, FL
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is March (6.4mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Bristol, FL
- Average humidity in September: 78%
The months with the highest relative humidity are September and December (78%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Bristol, FL
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Bristol, FL
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is November (5 days).
Average snowfall days in September
Bristol, FL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January, February and March (0.1 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Bristol, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Bristol, FL
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (23.6 days).
The month with the least sunshine days is July (7.6 days).
Average UV index in September
Bristol, 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
Bristol, FL
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 44).
The months with the least cloud cover are May and October (Cloud cover 28).
Average visibility in September
Bristol, FL
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are February and December (5mi).
Bristol, Florida, USA
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