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
September brings a slight decrease in the average high-temperature, shifting from a moderately hot 76.6°F (24.8°C) in August to an agreeable 68.9°F (20.5°C). An average minimum temperature of 49.1°F (9.5°C) is recorded in Bristol during the month of September.Humidity
The average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall in Bristol. Rain falls for 11.5 days and accumulates 1.85" (47mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Bristol is 12h and 29min.On the first day of the month, sunrise is at 6:11 am and sunset at 7:21 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:29 pm EDT.
Sunshine
The average sunshine in September in Bristol, New Hampshire, is 8.3h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 3 during September translates into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. To protect against the Sun's most potent rays, avoid direct exposure around midday. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Frequently asked questions
What are the temperatures in Bristol in September?
What is the average humidity in September in Bristol?
What is the driest month in Bristol?
How much does it rain in Bristol in September?
When it does not snow in Bristol?
Does it snow in Bristol in September?
What is the average length of the day in September in Bristol?
When is the sunrise / sunset in September in Bristol?
How many hours of sunshine does Bristol have in September?
What is the UV index reading in September in Bristol?
Average temperature in September
Bristol, NH
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (25.7°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in September
Bristol, NH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Bristol, NH
- Average wind speed in September: 4.8mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Bristol, NH
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Bristol, NH
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is October (3.15").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Bristol, NH
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is April (15.7 days).
The month with the least rainy days is January (10.1 days).
Average snowfall in September
Bristol, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (9.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bristol, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.5 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, NH
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in September
Bristol, NH
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is February (10.2 days).
Average UV index in September
Bristol, NH
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Bristol, NH
- Average cloud cover in September: 40
The months with the most cloud cover are February and March (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Bristol, NH
- Average visibility in September: 4mi
The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).
Bristol, New Hampshire, USA
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