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 reveals a small adjustment in temperature, transitioning from an average high of a warm 76.5°F (24.7°C) in August to a pleasant 68.9°F (20.5°C). Throughout September, an average low-temperature of 50°F (10°C) is expected.Humidity
In September, the average relative humidity is 79%.Rainfall
In Etna, during September, the rain falls for 9.4 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, there are 130.5 rainfall days, and 18.7" (475mm) of precipitation is accumulated.Snowfall
In Etna, snow does not fall in June through September.Daylight
In Etna, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 5:59 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 6:18 pm EDT.
Sunshine
In Etna, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Heed the precautions - It is counselled to guard against solar damage. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Etna 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?
How many hours of daylight does Etna have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Etna have in September?
What is the UV index reading in September?
Average temperature in September
Etna, ME
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (26.4°F).
- Average low temperature in September: 50°F
The month with the highest average low temperature is July (57.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in September
Etna, ME
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Etna, ME
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Etna, ME
- Average humidity in September: 79%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April and May (77%).
Average rainfall in September
Etna, ME
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is April (2.05").
The driest month (with the least rainfall) is July (1.1").
Average rainfall days in September
Etna, ME
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is June (14.6 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in September
Etna, ME
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Etna, ME
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (11.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Etna, ME
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in September
Etna, ME
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is April (12.1 days).
Average UV index in September
Etna, ME
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Etna, ME
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 39).
Average visibility in September
Etna, ME
- Average visibility in September: 5mi
The months with the highest visibility are October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August and September (5mi).
Etna, Maine, USA
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