September weather forecast
Millinocket, ME

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Weather in September

September witnesses the onset of autumn in Millinocket, Maine, marked by shorter days and cooler temperatures. Despite a significant drop in the average high temperature from 75.4°F (24.1°C) to 67.3°F (19.6°C), the month retains a mild warmth. As fall approaches, the lush green floras change color, providing a scenic backdrop to the city. Sweater weather begins to step in, introducing a significant shift in the daily experience of weather. With clear skies, the fall season slowly unfurls itself, making September a pleasant month in terms of weather.

Temperature

As September commences, the average high-temperature subtly reduces, transitioning from a moderately hot 75.4°F (24.1°C) in August to a comfortable 67.3°F (19.6°C). In Millinocket, in September, the average low-temperature is a frosty 47.8°F (8.8°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Millinocket, Maine, during September, the rain falls for 12 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Millinocket, during the entire year, the rain falls for 156.1 days and collects up to 26.89" (683mm) of precipitation.

Snowfall

In Millinocket, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 31min.
On the first day of September, sunrise is at 5:56 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 6:16 pm EDT.

Sunshine

The average sunshine in September in Millinocket is 7.8h.

UV index

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 3 suggests these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

September temperatures vary between a high-temperature of 67.3°F (19.6°C) and a low-temperature of 47.8°F (8.8°C).

What is the average humidity in September?

The average relative humidity in September is 79%.

How many days does it rain in September?

In Millinocket, Maine, in September, during 12 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

When it does not snow?

In Millinocket, snow does not fall in June through September.

Does it snow in September?

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

How many hours of daylight does Millinocket have in September?

The average day length in September is 12h and 31min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 5:56 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:32 am and sunset at 6:16 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 7.8h.

What is the UV index intensity in September in Millinocket?

In Millinocket, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to 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
Millinocket, ME

Average temperature in September - Millinocket, ME
  • Average high temperature in September: 67.3°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 (22.6°F).

  • Average low temperature in September: 47.8°F

The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).

Average pressure in September
Millinocket, ME

Average pressure in September - Millinocket, 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 (29.9"Hg).

Average wind speed in September
Millinocket, ME

Average wind speed in September - Millinocket, ME
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is March (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in September
Millinocket, ME

Average humidity in September - Millinocket, ME
  • Average humidity in September: 79%

The months with the highest relative humidity are February and March (89%).
The month with the lowest relative humidity is May (75%).

Average rainfall in September
Millinocket, ME

Average rainfall in September - Millinocket, ME
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is April (2.83").
The driest months (with the least rainfall) are March and July (1.73").

Average rainfall days in September
Millinocket, ME

Average rainfall days in September - Millinocket, ME
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is June (17.1 days).
The month with the least rainy days is February (7.3 days).

Average snowfall in September
Millinocket, ME

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

The month with the highest snowfall is February (10.24").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Millinocket, ME

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

The month with the highest number of snowfall days is February (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in September: 7h and 5min

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).

Average sunshine days in September
Millinocket, ME

Average sunshine days in September - Millinocket, ME
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is April (9.3 days).

Average UV index in September
Millinocket, ME

Average UV index in September - Millinocket, 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 and December (UV index 1).

Average cloud cover in September
Millinocket, ME

Average cloud cover in September - Millinocket, ME
  • Average cloud cover in September: 41

The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 40).

Average visibility in September
Millinocket, ME

Average visibility in September - Millinocket, 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).

Millinocket, Maine, USA

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