September weather forecast and climate
Harmony, AL

Weather in September

September, the first month of the autumn, in Harmony, is still a warm month, with average temperature fluctuating between 64°F (17.8°C) and 84°F (28.9°C).

Temperature

In Harmony, Alabama, the average high-temperature in September is almost the same as in August - a warm 84°F (28.9°C). In Harmony, in September, the average low-temperature is 64°F (17.8°C).

Heat index

The average heat index in September is calculated to a tropical 91.9°F (33.3°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (wind, metabolic differences, clothing), and activity. 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

The average relative humidity in September is 74%.

Rainfall

In September, in Harmony, the rain falls for 10.8 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. In Harmony, during the entire year, the rain falls for 147.2 days and collects up to 20.12" (511mm) of precipitation.

Snowfall

April through November are months without snowfall in Harmony.

Daylight

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

Sunshine

In Harmony, Alabama, the average sunshine in September is 8.7h.

UV index

In Harmony, Alabama, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Harmony?

In September, in Harmony, the average high-temperature is 84°F (28.9°C), and the average low-temperature is 64°F (17.8°C). In September, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that takes the relative humidity and factores it into the air temperature reading, is appraised at 91.9°F (33.3°C).

What is the average humidity in September in Harmony?

The average relative humidity in September in Harmony, Alabama, is 74%.

How many days does it rain in September in Harmony?

In Harmony, Alabama, during September, the rain falls for 10.8 days and regularly aggregates up to 1.22" (31mm) of precipitation.

When it does not snow in Harmony?

In Harmony, Alabama, snow does not fall in April through November.

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

The average length of the day in September in Harmony, Alabama, is 12.4h.

How long on average sun shines in September in Harmony?

In Harmony, Alabama, the average sunshine in September is 8.7h.

How high is the UV index in September in Harmony?

In September, the average daily maximum UV index in Harmony, Alabama, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Harmony, AL

Average temperature in September - Harmony, AL
  • Average high temperature in September: 84°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (50.5°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

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Average pressure in September
Harmony, AL

Average pressure in September - Harmony, 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
Harmony, AL

Average wind speed in September - Harmony, AL
  • Average wind speed in September: 4.5mph

The windiest months (with the highest average wind speed) are January and February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in September
Harmony, AL

Average humidity in September - Harmony, AL
  • Average humidity in September: 74%

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
Harmony, AL

Average rainfall in September - Harmony, AL
  • Average rainfall in September: 1.22"

The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is October (0.98").

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Average rainfall days in September
Harmony, AL

Average rainfall days in September - Harmony, AL
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is November (7.7 days).

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Average snowfall in September
Harmony, AL

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

The month with the highest snowfall is January (0.51").
Months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Harmony, AL

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

The month with the highest number of snowfall days is February (1.3 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is June (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in September
Harmony, AL

Average sunshine days in September - Harmony, AL
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is October (21.3 days).
The month with the least sunshine days is July (8.6 days).

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Average UV index in September
Harmony, AL

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

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in September
Harmony, AL

Average cloud cover in September - Harmony, AL
  • Average cloud cover in September: 30

Months with the most cloud cover are February and December (Cloud cover 47).
Months with the least cloud cover are June and September (Cloud cover 30).

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Average visibility in September
Harmony, AL

Average visibility in September - Harmony, 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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