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
September is characterized by a slight reduction in average high-temperature, easing from a pleasant 73°F (22.8°C) in August to a comfortable 64.8°F (18.2°C). Clayton Lake throughout September, experiences an average nighttime temperature of 46°F (7.8°C).Humidity
In September, the average relative humidity is 80%.Rainfall
In September, the rain falls for 13.3 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. In Clayton Lake, during the entire year, the rain falls for 141.4 days and collects up to 29.13" (740mm) of precipitation.Snowfall
In Clayton Lake, snow does not fall in June through September.Daylight
In Clayton Lake, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 5:58 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:19 pm EDT.
Sunshine
The average sunshine in September is 7.5h.UV index
In Clayton Lake, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 3 in September translates into this advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. 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 is the temperature in September?
What is the average humidity in September?
How many days 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 many hours of sunshine does Clayton Lake have in September?
What is the UV index intensity in September?
Average temperature in September
Clayton Lake, ME
- Average high temperature in September: 64.8°F
The warmest month (with the highest average high temperature) is July (74.5°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is July (54.5°F).
The coldest month (with the lowest average low temperature) is January (5.9°F).
Average pressure in September
Clayton Lake, ME
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are September and November (30.03"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Clayton Lake, ME
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Clayton Lake, ME
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is May (74%).
Average rainfall in September
Clayton Lake, ME
- Average rainfall in September: 2.2"
The wettest months (with the highest rainfall) are June and July (2.76").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days in September
Clayton Lake, ME
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in September
Clayton Lake, ME
- Average snowfall in September: 0"
The month with the highest snowfall is February (12.68").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clayton Lake, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (19.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clayton Lake, ME
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 7h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 18min).
Average sunshine days in September
Clayton Lake, ME
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (14.7 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in September
Clayton Lake, ME
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are February, March, November and December (UV index 1).
Average cloud cover in September
Clayton Lake, ME
- Average cloud cover in September: 44
The month with the most cloud cover is February (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 42).
Average visibility in September
Clayton Lake, ME
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).
Clayton Lake, Maine, USA
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