September weather forecast
Augusta, ME

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Beautiful view of the water and skyline in Augusta, Maine, with trees and mountains in a distance
Beautiful view of the water and skyline in Augusta, Maine, with trees and mountains in a distance

Weather in September

A sense of change is palpable in Augusta's September weather. The heat of summer makes a swift retreat, giving way to the cool winds of fall. The clear skies of the bygone summer months now entertain more clouds, mitigating the sunshine reaching the surface. Despite the shorter days, September still exudes a distinct charm with its comfortable temperatures and breezy conditions.

Temperature

September signifies a minor drop in average high-temperature, transitioning from a warm 76.1°F (24.5°C) in August to an agreeable 68.9°F (20.5°C). September nights in Augusta observe an average temperature dip to a fresh 50.5°F (10.3°C).

Humidity

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

Rainfall

September is the month with the least rainfall. Rain falls for 9.8 days and accumulates 1.42" (36mm) of precipitation.

Snowfall

June through September are months without snowfall in Augusta, Maine.

Daylight

The average length of the day in September in Augusta is 12h and 30min.
On the first day of September in Augusta, sunrise is at 6:02 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 6:21 pm EDT.

Sunshine

In September, the average sunshine in Augusta, Maine, is 8.5h.

UV index

In September, the average daily maximum UV index in Augusta is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 4 during September translates into the following recommendations:
Act with care - The need to guard against sun damage is communicated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the temperature in September in Augusta?

In September, in Augusta, the average high-temperature is 68.9°F (20.5°C), and the average low-temperature is 50.5°F (10.3°C).

What is the average humidity in September in Augusta?

In Augusta, Maine, the average relative humidity in September is 80%.

What is the driest month in Augusta?

The month with the least rainfall is September, when the rain falls for 9.8 days and typically collects 1.42" (36mm) of precipitation.

How many days does it rain in September in Augusta?

In Augusta, in September, during 9.8 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

When it does not snow in Augusta?

June through September are months without snowfall in Augusta.

Does it snow in Augusta in September?

In Augusta, Maine, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Augusta?

In September, the average day length in Augusta is 12h and 30min.

When are sunrise and sunset in September in Augusta?

In September, on the first day of the month, sunrise is at 6:02 am and sunset at 7:14 pm. On the last day of the month, in Augusta, Maine, sunrise is at 6:36 am and sunset at 6:21 pm EDT.

How long on average sun shines in September in Augusta?

In Augusta, Maine, the average sunshine duration in September is 8.5h.

What is the UV index intensity in September in Augusta?

The average daily maximum UV index in September in Augusta is 4. A UV Index of 3 to 5 symbolizes a medium health risk 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
Augusta, ME

Average temperature in September - Augusta, ME
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (27°F).

  • Average low temperature in September: 50.5°F

The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).

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Average pressure in September
Augusta, ME

Average pressure in September - Augusta, ME
  • Average pressure in September: 30.04"Hg

The months with the highest atmospheric pressure are September and November (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in September
Augusta, ME

Average wind speed in September - Augusta, ME
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
Augusta, ME

Average humidity in September - Augusta, ME
  • Average humidity in September: 80%

The months with the highest relative humidity are January, February and March (83%).
The month with the lowest relative humidity is November (76%).

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Average rainfall in September
Augusta, ME

Average rainfall in September - Augusta, ME
  • Average rainfall in September: 1.42"

The wettest month (with the highest rainfall) is October (2.95").
The driest month (with the least rainfall) is September (1.42").

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Average rainfall days in September
Augusta, ME

Average rainfall days in September - Augusta, ME
  • Average rainfall days in September: 9.8 days

The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is January (7 days).

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Average snowfall in September
Augusta, ME

Average snowfall in September - Augusta, ME
  • Average snowfall in September: 0"

The month with the highest snowfall is February (6.77").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Augusta, ME

Average snowfall days in September - Augusta, ME
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Augusta, ME

Average daylight in September / Average sunshine in September - Augusta, 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 3min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in September
Augusta, ME

Average sunshine days in September - Augusta, ME
  • Average sunshine days in September: 17.7 days

The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (11.6 days).

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Average UV index in September
Augusta, ME

Average UV index in September - Augusta, 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, October, November and December (UV index 2).

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Average cloud cover in September
Augusta, ME

Average cloud cover in September - Augusta, ME
  • Average cloud cover in September: 36

The months with the most cloud cover are March and April (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 36).

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Average visibility in September
Augusta, ME

Average visibility in September - Augusta, ME
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).

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Augusta, Maine, USA

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