September weather forecast and climate
Sinclair, ME

September, the first month of the autumn, in Sinclair, is also an enjoyable month, with temperature in the range of an average high of 63.5°F (17.5°C) and an average low of 45.1°F (7.3°C).

Temperature

In September, the average high-temperature marginally drops, from a pleasant 72.3°F (22.4°C) in August, to a comfortable 63.5°F (17.5°C). In Sinclair, in September, the average low-temperature is 45.1°F (7.3°C).

Humidity

The average relative humidity in September is 81%.

Rainfall

In Sinclair, it is raining for 13.1 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, there are 140.8 rainfall days, and 30.12" (765mm) of precipitation is accumulated.

Snowfall

In Sinclair snow does not fall in June through September.

Daylight

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

Sunshine

In Sinclair, the average sunshine in September is 7.3h.

UV index

In September, the average daily maximum UV index in Sinclair is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Sinclair?

In September, the average high-temperature is 63.5°F (17.5°C), and the average low-temperature is 45.1°F (7.3°C).

What is the average humidity in September in Sinclair?

The average relative humidity in September in Sinclair, Maine, is 81%.

How much does it rain in Sinclair in September?

In Sinclair, Maine, during September, the rain falls for 13.1 days and regularly aggregates up to 2.05" (52mm) of precipitation.

Does it snow in Sinclair in September?

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

When it does not snow in Sinclair?

In Sinclair snow does not fall in June through September.

How many hours of daylight does Sinclair have in September?

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

How many hours of sunshine does Sinclair have in September?

The average sunshine in September in Sinclair, Maine, is 7.3h.

What is the UV index reading in September in Sinclair?

In Sinclair, Maine, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Sinclair, ME
  • Average high temperature in September: 63.5°F

The warmest month (with the highest average high temperature) is July (74.3°F).
The month with the lowest average high temperature is January (18°F).

  • Average low temperature in September: 45.1°F

The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is January (2.8°F).

Average pressure in September - Sinclair, ME
  • Average pressure in September: 30.01"

Months with the highest atmospheric pressure are March, September and November (30.01").
The month with the lowest atmospheric pressure is June (29.88").

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

The windiest months (with the highest average wind speed) are January and February (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in September - Sinclair, ME
  • Average humidity in September: 81%

The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is May (76%).

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

The wettest month (with the highest rainfall) is April (2.95").
The driest month (with the least rainfall) is February (1.97").

Average rainfall days in September - Sinclair, ME
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is July (17.1 days).
Months with the least rainy days are January and February (4.3 days).

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

The month with the highest snowfall is January (14.92").
Months with the least snowfall are June, July, August and September (0").

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

The month with the highest number of snowfall days is January (21.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.6h).

  • Average sunshine in September: 7.3h

The month with the most sunshine is August (Average sunshine: 9.5h).
The month with the least sunshine is February (Average sunshine: 2.1h).

Average sunshine days in September - Sinclair, ME
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is April (7.9 days).

Average UV index in September - Sinclair, ME
  • Average UV index in September: 3

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 1).

Average cloud cover in September - Sinclair, ME
  • Average cloud cover in September: 44

The month with the most cloud cover is February (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 42).

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

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