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
Thornton's progression into September involves a gentle drop in the average high-temperature, from a pleasant 73°F (22.8°C) in August to a refreshing 65.8°F (18.8°C). Thornton's average low-temperature in the month of September is recorded at a chilly 46.6°F (8.1°C).Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall in Thornton. Rain falls for 10 days and accumulates 0.79" (20mm) of precipitation.Snowfall
June through September are months without snowfall in Thornton.Daylight
In September, the average length of the day in Thornton is 12h and 30min.On the first day of September in Thornton, sunrise is at 6:10 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:28 pm EDT.
Sunshine
In Thornton, the average sunshine in September is 7.6h.UV index
In Thornton, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Thornton?
What is the average humidity in September in Thornton?
What is the driest month in Thornton?
How many days does it rain in September in Thornton?
When it does not snow in Thornton?
Does it snow in Thornton in September?
How many hours of daylight does Thornton have in September?
When is the sunrise / sunset in September in Thornton?
How long on average sun shines in September in Thornton?
What is the UV index intensity in September in Thornton?
Average temperature in September
Thornton, NH
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is July (75°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in September: 46.6°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in September
Thornton, NH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Thornton, NH
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January and February (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Thornton, NH
- Average humidity in September: 81%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Thornton, NH
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is April (1.5").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in September
Thornton, NH
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is July (15.5 days).
The months with the least rainy days are January and February (5.3 days).
Average snowfall in September
Thornton, NH
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Thornton, NH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Thornton, 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: 7h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in September
Thornton, NH
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is February (10.2 days).
Average UV index in September
Thornton, NH
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Thornton, NH
- Average cloud cover in September: 48
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 44).
Average visibility in September
Thornton, NH
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
Thornton, New Hampshire, USA
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