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
The start of September signals a gentle decrease in the average high-temperature, transitioning from a moderately hot 80.2°F (26.8°C) in August to an agreeable 72.9°F (22.7°C). Throughout September, an average low-temperature of 54.3°F (12.4°C) is experienced.Humidity
The average relative humidity in September in Sherman is 80%.Rainfall
In September, in Sherman, the rain falls for 11.4 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. In Sherman, during the entire year, the rain falls for 140.7 days and collects up to 17.56" (446mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:20 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:36 pm EDT.
Sunshine
In September, the average sunshine is 8.2h.UV index
In Sherman, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Act with care - The need to guard against sun damage is communicated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow in Sherman?
Does it snow in September?
How many hours of daylight does Sherman have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Sherman have in September?
What is the UV index intensity in September?
Average temperature in September
Sherman, CT
- Average high temperature in September: 72.9°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 (32.4°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in September
Sherman, 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
Sherman, CT
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Sherman, CT
- Average humidity in September: 80%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Sherman, CT
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is July (2.24").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days in September
Sherman, CT
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (6.7 days).
Average snowfall in September
Sherman, CT
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sherman, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sherman, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in September
Sherman, CT
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in September
Sherman, CT
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Sherman, CT
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Sherman, CT
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Sherman, Connecticut, USA
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