Augusta
Maine, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Augusta, ME

 Beautiful view of the water and skyline in Augusta, Maine, with trees and mountains in the distance
Beautiful view of the water and skyline in Augusta, Maine, with trees and mountains in the distance
The first month of the autumn, September, is also an agreeable month in Augusta, Maine, with average temperature fluctuating between 68.9°F (20.5°C) and 50.5°F (10.3°C).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 76.1°F (24.5°C) in August, to an agreeable 68.9°F (20.5°C). In September, the average low-temperature is 50.5°F (10.3°C).

Humidity

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.

Daylight

In September, the average length of the day is 12.5h.

Sunshine

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

UV index

In Augusta, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Augusta?

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

What is the average humidity in September in Augusta?

In September, the average relative humidity is 80%.

How much does it rain in Augusta in September?

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

What is the driest month in Augusta?

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

Does it snow in Augusta in September?

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

When it does not snow in Augusta?

In Augusta snow does not fall in June through September.

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

The average length of the day in September in Augusta, Maine, is 12.5h.

How many hours of sunshine does Augusta have in September?

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

What is the UV index reading in September in Augusta?

In September, the average daily maximum UV index in Augusta, Maine, is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Augusta, ME
  • Average high temperature in September: 20.5°C

The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (-2.8°C).

  • Average low temperature in September: 10.3°C

The month with the highest average low temperature is July (14.3°C).
The coldest month (with the lowest average low temperature) is January (-10.2°C).

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

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

Average rainfall in September - Augusta, ME
  • Average rainfall in September: 36mm

The wettest month (with the highest rainfall) is October (75mm).
The driest month (with the lowest rainfall) is September (36mm).

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 lowest number of rainy days is January (7 days).

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

The month with the highest snowfall is February (172mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Augusta, ME
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 8.5h

The month with most sunshine is August (Average sunshine: 10.1h).
The month with least sunshine is February (Average sunshine: 4.6h).

Average UV index in September - Augusta, ME
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, October, November and December (UV index 2).