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 commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from a moderately hot 78.8°F (26°C) in August to an agreeable 71.8°F (22.1°C). In Colebrook, September nights cool down to an average of 53.1°F (11.7°C).Humidity
The average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 13 days and typically collects 2.09" (53mm) 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 the month, sunrise is at 6:18 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 Colebrook is 8.3h.UV index
In Colebrook, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Guard yourself - Avoiding sunburn is suggested. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Colebrook, CT
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in September: 53.1°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
Colebrook, 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
Colebrook, CT
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in September
Colebrook, CT
- Average humidity in September: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
Colebrook, CT
- Average rainfall in September: 2.09"
The wettest months (with the highest rainfall) are October and December (3.31").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in September
Colebrook, CT
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is February (7.1 days).
Average snowfall in September
Colebrook, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.38").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Colebrook, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Colebrook, CT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 2min
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 12min).
Average sunshine days in September
Colebrook, CT
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Colebrook, CT
- Average UV index in September: 4
The month with the highest UV index is June (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
Colebrook, CT
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Colebrook, 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).
Colebrook, Connecticut, USA
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