September weather forecast and climate
Princeton, AL

Weather in September

The first month of the autumn, September, is still a warm month in Princeton, Alabama, with average temperature fluctuating between 62.6°F (17°C) and 82°F (27.8°C).

Temperature

In Princeton, the average high-temperature in September is almost the same as in August - a moderately hot 82°F (27.8°C). The average low-temperature, in Princeton, is 62.6°F (17°C).

Heat index

In September, the average heat index is estimated at a hot 87.6°F (30.9°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, clothing, differences in body mass, height, and shape, and wind affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Princeton, the average relative humidity in September is 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 13.8 days and accumulates 2.17" (55mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day in Princeton, Alabama, is 12.4h.

Sunshine

The average sunshine in Princeton is 8.7h.

UV index

In Princeton, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Princeton?

The average high-temperature, in September, is 82°F (27.8°C), while the average low-temperature is 62.6°F (17°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), that factores the actual air temperature with the relative humidity, in September is estimated at 87.6°F (30.9°C).

What is the average humidity in September in Princeton?

The average relative humidity in September in Princeton is 75%.

How much does it rain in Princeton in September?

In Princeton, during September, the rain falls for 13.8 days and regularly aggregates up to 2.17" (55mm) of precipitation.

What is the driest month in Princeton?

September is the month with the least rainfall in Princeton, Alabama. Rain falls for 13.8 days and accumulates 2.17" (55mm) of precipitation.

When it does not snow in Princeton?

In Princeton snow does not fall in April through October.

How many hours of daylight does Princeton have in September?

In Princeton, Alabama, the average length of the day in September is 12.4h.

How long on average sun shines in September in Princeton?

The average sunshine in September in Princeton is 8.7h.

What is the UV index reading in September in Princeton?

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Princeton, AL

Average temperature in September - Princeton, AL
  • Average high temperature in September: 82°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (46.9°F).

  • Average low temperature in September: 62.6°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (32.7°F).

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Average pressure in September
Princeton, AL

Average pressure in September - Princeton, AL
  • Average pressure in September: 30.02"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.98").

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Average wind speed in September
Princeton, AL

Average wind speed in September - Princeton, AL
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is February (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

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Average humidity in September
Princeton, AL

Average humidity in September - Princeton, AL
  • Average humidity in September: 75%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in September
Princeton, AL

Average rainfall in September - Princeton, AL
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is April (4.45").
The driest month (with the least rainfall) is September (2.17").

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Average rainfall days in September
Princeton, AL

Average rainfall days in September - Princeton, AL
  • Average rainfall days in September: 13.8 days

The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is November (9.1 days).

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Average snowfall in September
Princeton, AL

Average snowfall in September - Princeton, AL
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.83").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Princeton, AL

Average snowfall days in September - Princeton, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (1.9 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Princeton, AL

Average daylight in September / Average sunshine in September - Princeton, AL
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is June (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in September
Princeton, AL

Average sunshine days in September - Princeton, AL
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index in September
Princeton, AL

Average UV index in September - Princeton, AL
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in September
Princeton, AL

Average cloud cover in September - Princeton, AL
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 30).

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Average visibility in September
Princeton, AL

Average visibility in September - Princeton, AL
  • Average visibility in September: 6mi

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

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