September weather forecast and climate
Harrell, AL

Weather in September

September, the first month of the autumn, in Harrell, is also a hot month, with average temperature varying between 87.6°F (30.9°C) and 67.1°F (19.5°C).

Temperature

In September, the average high-temperature is practically the same as in August - a still hot 87.6°F (30.9°C). The average low-temperature, in Harrell, is 67.1°F (19.5°C).

Heat index

In September, the average heat index is appraised at a torrid 100.2°F (37.9°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', 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, pregnancy, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In September, the average relative humidity is 72%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 1.93" (49mm) of precipitation.

Snowfall

In Harrell snow does not fall in April through November.

Daylight

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

Sunshine

In Harrell, the average sunshine is 9h.

UV index

In Harrell, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 Harrell?

In September, in Harrell, the average high-temperature is 87.6°F (30.9°C), and the average low-temperature is 67.1°F (19.5°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that combines both air temperature and relative humidity, is estimated at 100.2°F (37.9°C).

What is the average humidity in September in Harrell?

In Harrell, the average relative humidity in September is 72%.

How much does it rain in Harrell in September?

In September, in Harrell, Alabama, the rain falls for 12.6 days. Throughout September, 1.93" (49mm) of precipitation is accumulated.

What is the driest month in Harrell?

The month with the least rainfall in Harrell, Alabama, is September when the rain falls for 12.6 days and typically collects 1.93" (49mm) of precipitation.

When it does not snow in Harrell?

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

How many hours of daylight does Harrell have in September?

The average length of the day in September in Harrell is 12.4h.

How many hours of sunshine does Harrell have in September?

In Harrell, the average sunshine in September is 9h.

What is the UV index intensity in September in Harrell?

In September, the average daily maximum UV index in Harrell, Alabama, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Harrell, AL

Average temperature in September - Harrell, AL
  • Average high temperature in September: 87.6°F

The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (54.3°F).

  • Average low temperature in September: 67.1°F

Months with the highest average low temperature are July and August (72°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).

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Average pressure in September
Harrell, AL

Average pressure in September - Harrell, AL
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June and August (29.97").

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Average wind speed in September
Harrell, AL

Average wind speed in September - Harrell, AL
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).

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Average humidity in September
Harrell, AL

Average humidity in September - Harrell, AL
  • Average humidity in September: 72%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in September
Harrell, AL

Average rainfall in September - Harrell, AL
  • Average rainfall in September: 1.93"

The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the least rainfall) is September (1.93").

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Average rainfall days in September
Harrell, AL

Average rainfall days in September - Harrell, AL
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is July (20.5 days).
The month with the least rainy days is November (7.8 days).

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Average snowfall in September
Harrell, AL

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

The month with the highest snowfall is January (0.35").
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
Harrell, AL

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

The month with the highest number of snowfall days is January (0.8 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 9h

The month with the most sunshine is June (Average sunshine: 10.6h).
Months with the least sunshine are February and December (Average sunshine: 4.9).

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Average sunshine days in September
Harrell, AL

Average sunshine days in September - Harrell, AL
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is October (21.7 days).
The month with the least sunshine days is July (8 days).

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Average UV index in September
Harrell, AL

Average UV index in September - Harrell, AL
  • Average UV index in September: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January and December (UV index 3).

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Average cloud cover in September
Harrell, AL

Average cloud cover in September - Harrell, 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 September and October (Cloud cover 30).

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Average visibility in September
Harrell, AL

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

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

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