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 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 commencement of September, Bristol records a moderate temperature decline, with the average high easing from August's 80.4°F (26.9°C) to a still moderately hot 73.4°F (23°C). Nighttime temperatures consistently average a cool 55.2°F (12.9°C) during September.Humidity
In Bristol, Connecticut, the average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 13.6 days and accumulates 2.24" (57mm) of precipitation.Snowfall
June through September are months without snowfall in Bristol.Daylight
The average length of the day in September in Bristol is 12h and 28min.On the first day of September in Bristol, Connecticut, sunrise is at 6:18 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:34 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What is the usual temperature for Bristol in September?
What is the average humidity in September in Bristol?
What is the driest month in Bristol?
How many days does it rain in September in Bristol?
When it does not snow in Bristol?
Does it snow in Bristol in September?
How many hours of daylight does Bristol have in September?
When are sunrise and sunset in September in Bristol?
How long on average sun shines in September in Bristol?
How high is the UV index in September in Bristol?
Average temperature in September
Bristol, CT
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Bristol, CT
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Bristol, CT
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Bristol, CT
- Average humidity in September: 78%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Bristol, CT
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Bristol, CT
- Average rainfall days in September: 13.6 days
The months with the highest number of rainy days are May and July (18.3 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in September
Bristol, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bristol, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bristol, CT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Bristol, CT
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is January (16.7 days).
The month with the least sunshine days is June (10 days).
Average UV index in September
Bristol, CT
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Bristol, CT
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Bristol, CT
- Average visibility in September: 5mi
The months with the highest visibility are January, April, October, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August and September (5mi).
Bristol, Connecticut, USA
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