September weather forecast and climate
Lavaca, AR

Weather in September

The first month of the autumn, September, is still a warm month in Lavaca, Arkansas, with average temperature fluctuating between 62.6°F (17°C) and 84.4°F (29.1°C).

Temperature

In Lavaca, the average high-temperature in September slightly decreases, from a hot 91.4°F (33°C) in August, to a warm 84.4°F (29.1°C). In September, in Lavaca, the average low-temperature is 62.6°F (17°C).

Heat index

In September, the average heat index is evaluated at 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.
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', 'real feel', 'apparent temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, wind), 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.

Humidity

The average relative humidity is 72%.

Rainfall

In Lavaca, during September, the rain falls for 9.6 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Lavaca, during the entire year, the rain falls for 106.9 days and collects up to 10.71" (272mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

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

Sunshine

In Lavaca, the average sunshine is 9.5h.

UV index

The average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 Lavaca?

The average high-temperature, in September, in Lavaca, is 84.4°F (29.1°C), while the average low-temperature is 62.6°F (17°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, in September is evaluated at 91.9°F (33.3°C).

What is the average humidity in September in Lavaca?

The average relative humidity in September is 72%.

How many days does it rain in September in Lavaca?

In September, the rain falls for 9.6 days. Throughout September, 0.98" (25mm) of precipitation is accumulated.

When it does not snow in Lavaca?

In Lavaca snow does not fall in April through October.

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

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

How many hours of sunshine does Lavaca have in September?

In September, the average sunshine in Lavaca is 9.5h.

How high is the UV index in September in Lavaca?

In Lavaca, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Lavaca, AR

Average temperature in September - Lavaca, AR
  • Average high temperature in September: 84.4°F

The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (48.2°F).

  • Average low temperature in September: 62.6°F

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

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Average pressure in September
Lavaca, AR

Average pressure in September - Lavaca, AR
  • Average pressure in September: 30.01"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Lavaca, AR

Average wind speed in September - Lavaca, AR
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

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Average humidity in September
Lavaca, AR

Average humidity in September - Lavaca, AR
  • Average humidity in September: 72%

The month with the highest relative humidity is May (78%).
Months with the lowest relative humidity are July and August (70%).

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Average rainfall in September
Lavaca, AR

Average rainfall in September - Lavaca, AR
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is May (1.46").
The driest month (with the least rainfall) is December (0.51").

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Average rainfall days in September
Lavaca, AR

Average rainfall days in September - Lavaca, AR
  • Average rainfall days in September: 9.6 days

The month with the highest number of rainy days is July (12.3 days).
The month with the least rainy days is January (5.1 days).

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Average snowfall in September
Lavaca, AR

Average snowfall in September - Lavaca, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is March (0.2").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Lavaca, AR

Average snowfall days in September - Lavaca, AR
  • Average snowfall days in September: 0 days

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

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Average daylight in September /
Average sunshine in September
Lavaca, AR

Average daylight in September / Average sunshine in September - Lavaca, AR
  • 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: 9.8h).

  • Average sunshine in September: 9.5h

Months with the most sunshine are July and August (Average sunshine: 10.8h).
The month with the least sunshine is January (Average sunshine: 5.5h).

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Average sunshine days in September
Lavaca, AR

Average sunshine days in September - Lavaca, AR
  • Average sunshine days in September: 17 days

The month with the most sunshine days is December (23.9 days).
The month with the least sunshine days is August (14.5 days).

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Average UV index in September
Lavaca, AR

Average UV index in September - Lavaca, AR
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Lavaca, AR

Average cloud cover in September - Lavaca, AR
  • Average cloud cover in September: 27

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 24).

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Average visibility in September
Lavaca, AR

Average visibility in September - Lavaca, AR
  • Average visibility in September: 6mi

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

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