September weather forecast
Knowles Corner, ME

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Weather in September

The first month of the autumn, September, is still a comfortable month in Knowles Corner, Maine, with temperature in the range of an average low of 47.1°F (8.4°C) and an average high of 66.4°F (19.1°C).

Temperature

Knowles Corner experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a warm 74.5°F (23.6°C) in August to an enjoyable 66.4°F (19.1°C). During September nights, Knowles Corner witnesses a consistent average temperature of 47.1°F (8.4°C).

Humidity

In September, the average relative humidity in Knowles Corner is 80%.

Rainfall

In Knowles Corner, in September, it is raining for 12.6 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 147.4 rainfall days, and 31.81" (808mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In Knowles Corner, the average length of the day in September is 12h and 32min.
On the first day of the month, sunrise is at 5:54 am and sunset at 7:11 pm. On the last day of September, sunrise is at 6:31 am and sunset at 6:14 pm EDT.

Sunshine

In September, the average sunshine is 7.4h.

UV index

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 3 in September transforms into the following instructions:
Adopt protective measures - It is advised to guard against sun damage. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Updated: Jul 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Knowles Corner?

An average high-temperature, in September, in Knowles Corner, is 66.4°F (19.1°C) and the average low-temperature is 47.1°F (8.4°C).

What is the average humidity in September?

In September, the average relative humidity is 80%.

How much does it rain in September?

In Knowles Corner, during September, the rain falls for 12.6 days and regularly aggregates up to 2.32" (59mm) of precipitation.

When it does not snow?

In Knowles Corner, Maine, snow does not fall in June through September.

Does it snow in Knowles Corner in September?

In Knowles Corner, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

In September, the average day length is 12h and 32min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 5:54 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 6:14 pm EDT.

How long on average sun shines in September?

In Knowles Corner, the average sunshine duration in September is 7.4h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Knowles Corner, ME

Average temperature in September - Knowles Corner, ME
  • Average high temperature in September: 66.4°F

The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (21.9°F).

  • Average low temperature in September: 47.1°F

The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).

Average pressure in September
Knowles Corner, ME

Average pressure in September - Knowles Corner, ME
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is September (30.03"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in September
Knowles Corner, ME

Average wind speed in September - Knowles Corner, ME
  • Average wind speed in September: 6.8mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

Average humidity in September
Knowles Corner, ME

Average humidity in September - Knowles Corner, ME
  • Average humidity in September: 80%

The months with the highest relative humidity are January, February and March (91%).
The month with the lowest relative humidity is May (76%).

Average rainfall in September
Knowles Corner, ME

Average rainfall in September - Knowles Corner, ME
  • Average rainfall in September: 2.32"

The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is July (2.17").

Average rainfall days in September
Knowles Corner, ME

Average rainfall days in September - Knowles Corner, ME
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in September
Knowles Corner, ME

Average snowfall in September - Knowles Corner, ME
  • Average snowfall in September: 0"

The months with the highest snowfall are January and February (13.07").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Knowles Corner, ME

Average snowfall days in September - Knowles Corner, 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
Knowles Corner, ME

Average daylight in September / Average sunshine in September - Knowles Corner, ME
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in September: 7h and 2min

The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is February (Average sunshine: 2h and 36min).

Average sunshine days in September
Knowles Corner, ME

Average sunshine days in September - Knowles Corner, ME
  • Average sunshine days in September: 15.1 days

The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is April (8.7 days).

Average UV index in September
Knowles Corner, ME

Average UV index in September - Knowles Corner, 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 January, February, March, November and December (UV index 1).

Average cloud cover in September
Knowles Corner, ME

Average cloud cover in September - Knowles Corner, ME
  • Average cloud cover in September: 44

The month with the most cloud cover is February (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 42).

Average visibility in September
Knowles Corner, ME

Average visibility in September - Knowles Corner, ME
  • Average visibility in September: 5mi

The months with the highest visibility are April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March and December (4mi).

Knowles Corner, Maine, USA

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