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 onset of September, the average high-temperature subtly recedes from August's 80.4°F (26.9°C) to a still warm 73.4°F (23°C). Stevenson's nighttime temperature in September falls to an average of 57.7°F (14.3°C).Humidity
In September, the average relative humidity in Stevenson is 77%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 0.55" (14mm) of precipitation is accumulated. In Stevenson, during the entire year, the rain falls for 118.8 days and collects up to 9.61" (244mm) of precipitation.Snowfall
In Stevenson, Connecticut, snow does not fall in April through October.Daylight
The average length of the day in September in Stevenson is 12h and 28min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:35 pm EDT.
Sunshine
In September, the average sunshine in Stevenson is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 suggests these recommendations:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
What are September temperatures in Stevenson?
What is the average humidity in September in Stevenson?
How many days does it rain in September in Stevenson?
When it does not snow in Stevenson?
What is the average length of the day in September in Stevenson?
What time are sunrise and sunset in September in Stevenson?
How long on average sun shines in September in Stevenson?
What is the UV index reading in September in Stevenson?
Average temperature in September
Stevenson, CT
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in September
Stevenson, CT
- Average pressure in September: 30.05"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
Stevenson, CT
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Stevenson, CT
- Average humidity in September: 77%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Stevenson, CT
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is July (1.22").
The driest months (with the least rainfall) are January and February (0.47").
Average rainfall days in September
Stevenson, CT
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Stevenson, CT
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Stevenson, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.8 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
Stevenson, 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 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Stevenson, CT
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is July (13.9 days).
Average UV index in September
Stevenson, 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
Stevenson, CT
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Stevenson, CT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Stevenson, Connecticut, USA
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