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
Start of September in Norwich brings a slight shift in the average high-temperature, dipping a bit from August's moderately hot 80.2°F (26.8°C) to a pleasant 73.2°F (22.9°C). During September, Norwich records an average temperature of 57.4°F (14.1°C) at night.Humidity
February, June, July and September, with an average relative humidity of 78%, are the most humid months.Rainfall
The month with the least rainfall in Norwich is September, when the rain falls for 11.8 days and typically collects 1.61" (41mm) of precipitation.Snowfall
In Norwich, snow does not fall in June through October.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:15 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:31 pm EDT.
Sunshine
The average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take precautions - Protection against sunburn is recommended. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What are the most humid months?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Norwich, CT
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in September
Norwich, CT
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Norwich, CT
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in September
Norwich, CT
- Average humidity in September: 78%
The months with the highest relative humidity are February, June, July and September (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Norwich, CT
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in September
Norwich, CT
- Average rainfall days in September: 11.8 days
The months with the highest number of rainy days are May and July (16.3 days).
The month with the least rainy days is January (9 days).
Average snowfall in September
Norwich, CT
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.43").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Norwich, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Norwich, CT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 2min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Norwich, CT
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in September
Norwich, 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
Norwich, CT
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Norwich, CT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, September, October, November and December (6mi).
The months with the lowest visibility are May, June, July and August (5mi).
Norwich, Connecticut, USA
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