September weather forecast and climate
Winterport, ME

Weather in September

The first month of the autumn, September, is still a pleasant month in Winterport, Maine, with average temperature varying between 68.7°F (20.4°C) and 50.7°F (10.4°C).

Temperature

In Winterport, the average high-temperature in September slightly decreases, from a warm 75.6°F (24.2°C) in August, to a pleasant 68.7°F (20.4°C). In September, in Winterport, the average low-temperature is 50.7°F (10.4°C).

Humidity

The average relative humidity in September is 80%.

Rainfall

In Winterport, it is raining for 10.5 days, with typically 1.57" (40mm) of accumulated precipitation. In Winterport, during the entire year, the rain falls for 144.3 days and collects up to 24.61" (625mm) of precipitation.

Snowfall

June through September are months without snowfall in Winterport.

Ocean temperature

In Winterport, the average seawater temperature is 55.9°F (13.3°C).
Note: Swimming in 55.9°F (13.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

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

Sunshine

In Winterport, the average sunshine in September is 8.1h.

UV index

In Winterport, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the ordinary 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.
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FAQ

What is the average humidity in September in Winterport?

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

How many days does it rain in September in Winterport?

In September, in Winterport, the rain falls for 10.5 days. Throughout September, 1.57" (40mm) of precipitation is accumulated.

When it does not snow in Winterport?

In Winterport snow does not fall in June through September.

Does it snow in Winterport in September?

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

How cold is the water in September in Winterport?

In September, the average ocean temperature in Winterport, Maine, is 55.9°F (13.3°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

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

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

How many hours of sunshine does Winterport have in September?

The average sunshine in September in Winterport is 8.1h.

What is the UV index intensity in September in Winterport?

In September, the average daily maximum UV index in Winterport, Maine, is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.

Average temperature in September
Winterport, ME

Average temperature in September - Winterport, ME
  • Average high temperature in September: 68.7°F

The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (27.9°F).

  • Average low temperature in September: 50.7°F

The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).

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Average pressure in September
Winterport, ME

Average pressure in September - Winterport, ME
  • Average pressure in September: 30.04"

The month with the highest atmospheric pressure is September (30.04").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in September
Winterport, ME

Average wind speed in September - Winterport, ME
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Winterport, ME

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

The month with the highest relative humidity is February (84%).
Months with the lowest relative humidity are April and November (77%).

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Average rainfall in September
Winterport, ME

Average rainfall in September - Winterport, ME
  • Average rainfall in September: 1.57"

The wettest month (with the highest rainfall) is April (2.72").
The driest month (with the least rainfall) is July (1.42").

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Average rainfall days in September
Winterport, ME

Average rainfall days in September - Winterport, ME
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (7.6 days).

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Average snowfall in September
Winterport, ME

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

The month with the highest snowfall is January (4.69").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Winterport, ME

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

The month with the highest number of snowfall days is February (10.7 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in September
Winterport, ME

Average sea temperature in September - Winterport, ME
  • Average sea temperature in September: 55.9°F

The best month for swimming (with the highest average sea temperature) is August (57.7°F).
The coldest month (with the lowest average sea temperature) is March (37.5°F).

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

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

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

  • Average sunshine in September: 8.1h

The month with the most sunshine is August (Average sunshine: 9.8h).
The month with the least sunshine is February (Average sunshine: 4.1h).

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Average sunshine days in September
Winterport, ME

Average sunshine days in September - Winterport, ME
  • Average sunshine days in September: 18 days

The month with the most sunshine days is September (18 days).
The month with the least sunshine days is April (11.6 days).

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Average UV index in September
Winterport, ME

Average UV index in September - Winterport, 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).

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Average cloud cover in September
Winterport, ME

Average cloud cover in September - Winterport, ME
  • Average cloud cover in September: 39

Months with the most cloud cover are February, March and April (Cloud cover 55).
Months with the least cloud cover are August and September (Cloud cover 39).

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Average visibility in September
Winterport, ME

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

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

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