September weather forecast
Richmond, LA

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Weather in September

The first month of the autumn, September, is also a hot month in Richmond, Louisiana, with an average temperature ranging between min 67.6°F (19.8°C) and max 87.8°F (31°C).

Temperature

As August turns into September, the average high-temperatures rest at a still hot 87.8°F (31°C), showing a minor variation from the prior month. During the September nights, an average temperature of 67.6°F (19.8°C) is observed.

Heat index

In September, the average heat index is calculated to be a torrid 102.2°F (39°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Heat index determinations are made taking into account the shade and light air movements. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In September, the average relative humidity is 73%.

Rainfall

The month with the least rainfall is September, when the rain falls for 12.4 days and typically collects 2.05" (52mm) of precipitation.

Snowfall

In Richmond, snow does not fall in April through October and December.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:50 pm CDT.

Sunshine

The average sunshine in September is 9.7h.

UV index

In Richmond, Louisiana, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. 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. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.

Frequently asked questions

How hot is September?

In September, the average high-temperature and low-temperature are 87.8°F (31°C) and 67.6°F (19.8°C) respectively. In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is calculated to be 102.2°F (39°C).

What is the average humidity in September?

The average relative humidity in September is 73%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 12.4 days and typically collects 2.05" (52mm) of precipitation.

How many days does it rain in September in Richmond?

In Richmond, during September, the rain falls for 12.4 days and regularly aggregates up to 2.05" (52mm) of precipitation.

When it does not snow?

In Richmond, snow does not fall in April through October and December.

How many hours of daylight does Richmond have in September?

The average day length in September is 12h and 22min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:40 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:50 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 9.7h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability 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
Richmond, LA

Average temperature in September - Richmond, LA
  • Average high temperature in September: 87.8°F

The warmest months (with the highest average high temperature) are July and August (91.6°F).
The month with the lowest average high temperature is January (54.1°F).

  • Average low temperature in September: 67.6°F

The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).

Average pressure in September
Richmond, LA

Average pressure in September - Richmond, LA
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in September
Richmond, LA

Average wind speed in September - Richmond, LA
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is February (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Richmond, LA

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

The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is October (68%).

Average rainfall in September
Richmond, LA

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

The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is September (2.05").

Average rainfall days in September
Richmond, LA

Average rainfall days in September - Richmond, LA
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is August (16.7 days).
The month with the least rainy days is October (8.8 days).

Average snowfall in September
Richmond, LA

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

The month with the highest snowfall is January (0.35").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").

Average snowfall days in September
Richmond, LA

Average snowfall days in September - Richmond, 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 and October (0 days).

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

Average daylight in September / Average sunshine in September - Richmond, 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 4min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

Average sunshine days in September
Richmond, LA

Average sunshine days in September - Richmond, LA
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is August (12.5 days).

Average UV index in September
Richmond, LA

Average UV index in September - Richmond, 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).

Average cloud cover in September
Richmond, LA

Average cloud cover in September - Richmond, LA
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are June and October (Cloud cover 27).

Average visibility in September
Richmond, LA

Average visibility in September - Richmond, LA
  • Average visibility in September: 6mi

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

Richmond, Louisiana, USA

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