September weather forecast
Clarence, LA

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Weather in September

September ushers in a noticeable transformation in the weather of Clarence, Louisiana as summer starts receding, paving the way for the fall season. As temperatures start moderating, humidity and rainfall witness slight decreases, offering a respite from the severe summer conditions. The wind speed remains close to 5mph (8km/h), suggesting stable weather conditions. Despite marking the arrival of falls, UV Index remains at an elevation, cautioning locals for necessary safeguards. With the start of shorter days, the abundant sunshine hours begin to lessen gradually.

Temperature

A mild shift in the average high-temperature occurs in September in Clarence, reducing from a hot 94.3°F (34.6°C) in August to a still tropical 88.9°F (31.6°C). Throughout the month of September, Clarence witnesses an average temperature of 68°F (20°C).

Heat index

The average heat index in September is estimated at a scorching 104°F (40°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The average relative humidity in September in Clarence is 73%.

Rainfall

In Clarence, in September, during 13.1 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Clarence, during the entire year, the rain falls for 142.7 days and collects up to 23.9" (607mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

In September, the average length of the day in Clarence is 12h and 21min.
On the first day of September, sunrise is at 6:48 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:57 pm CDT.

Sunshine

In September, the average sunshine in Clarence is 9.4h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 6 in September translates into these instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

How hot is it in Clarence in September?

In Clarence, in September, the average high-temperature is 88.9°F (31.6°C), and the average low-temperature is 68°F (20°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, in September is estimated at 104°F (40°C).

What is the average humidity in September in Clarence?

The average relative humidity in September in Clarence is 73%.

How much does it rain in Clarence in September?

In Clarence, Louisiana, in September, it is raining for 13.1 days, with typically 2.05" (52mm) of accumulated precipitation.

When it does not snow in Clarence?

In Clarence, snow does not fall in April through November.

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

In Clarence, the average day length in September is 12h and 21min.

When is the sunrise / sunset in September in Clarence?

On the first day of September in Clarence, Louisiana, sunrise is at 6:48 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:57 pm CDT.

How many hours of sunshine does Clarence have in September?

The average sunshine duration in September in Clarence, Louisiana, is 9.4h.

What is the UV index reading in September in Clarence?

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Clarence, LA

Average temperature in September - Clarence, LA
  • Average high temperature in September: 88.9°F

The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is January (55.8°F).

  • Average low temperature in September: 68°F

The months with the highest average low temperature are July and August (73°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).

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Average pressure in September
Clarence, LA

Average pressure in September - Clarence, LA
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Clarence, LA

Average wind speed in September - Clarence, LA
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).

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Average humidity in September
Clarence, LA

Average humidity in September - Clarence, LA
  • Average humidity in September: 73%

The month with the highest relative humidity is February (83%).
The months with the lowest relative humidity are August and October (71%).

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Average rainfall in September
Clarence, LA

Average rainfall in September - Clarence, LA
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is August (2.87").
The driest month (with the least rainfall) is November (1.3").

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Average rainfall days in September
Clarence, LA

Average rainfall days in September - Clarence, LA
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is August (15.9 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall in September
Clarence, LA

Average snowfall in September - Clarence, LA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.2").
The 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
Clarence, LA

Average snowfall days in September - Clarence, LA
  • Average snowfall days in September: 0 days

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

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Average daylight in September /
Average sunshine in September
Clarence, LA

Average daylight in September / Average sunshine in September - Clarence, LA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

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Average sunshine days in September
Clarence, LA

Average sunshine days in September - Clarence, LA
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is August (12.1 days).

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Average UV index in September
Clarence, LA

Average UV index in September - Clarence, LA
  • Average UV index in September: 6

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

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Average cloud cover in September
Clarence, LA

Average cloud cover in September - Clarence, LA
  • 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 October (Cloud cover 30).

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Average visibility in September
Clarence, LA

Average visibility in September - Clarence, LA
  • Average visibility in September: 5mi

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

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Clarence, Louisiana, USA

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