September weather forecast
Diamond, LA

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Weather in September

September, the first month of the autumn in Diamond, is also a moderately hot month, with an average temperature fluctuating between 77.7°F (25.4°C) and 85.1°F (29.5°C).

Temperature

Diamond, Louisiana, records an average high-temperature of a moderately hot 85.1°F (29.5°C) in September, closely mirroring the climate of the previous month. Diamond welcomes an average low temperature of 77.7°F (25.4°C) in September, a gentle shift from the day's high.

Heat index

For September, the heat index is computed to be a fiery hot 95°F (35°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Consider that heat index readings are for situations in the shade and light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Diamond, the average relative humidity in September is 74%.

Rainfall

In Diamond, in September, during 14.7 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. Throughout the year, there are 137.2 rainfall days, and 19.92" (506mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Daylight

The average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:45 pm CDT.

Sunshine

In September, the average sunshine is 10.2h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 7 in September translates into the following instructions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

In September, the average high-temperature and low-temperature are 85.1°F (29.5°C) and 77.7°F (25.4°C) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in September is computed to be 95°F (35°C).

What is the average humidity in September?

The average relative humidity in September in Diamond is 74%.

How much does it rain in September?

In Diamond, in September, it is raining for 14.7 days, with typically 1.77" (45mm) of accumulated precipitation.

When it does not snow in Diamond?

In Diamond, snow does not fall in February through December.

How many hours of daylight does Diamond have in September?

In Diamond, Louisiana, the average day length in September is 12h and 20min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:36 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:45 pm CDT.

How many hours of sunshine does Diamond have in September?

In Diamond, Louisiana, the average sunshine duration in September is 10.2h.

When is the highest UV index?

May through September, with an average maximum UV index of 7, are months with the highest UV index.

What is the UV index intensity in September?

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

Average temperature in September
Diamond, LA

Average temperature in September - Diamond, LA
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is August (87.6°F).
The month with the lowest average high temperature is January (61.2°F).

  • Average low temperature in September: 77.7°F

The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is January (51.6°F).

Average pressure in September
Diamond, LA

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

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).

Average wind speed in September
Diamond, LA

Average wind speed in September - Diamond, LA
  • Average wind speed in September: 8.2mph

The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).

Average humidity in September
Diamond, LA

Average humidity in September - Diamond, LA
  • Average humidity in September: 74%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September
Diamond, LA

Average rainfall in September - Diamond, LA
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is August (4.72").
The driest month (with the least rainfall) is April (0.79").

Average rainfall days in September
Diamond, LA

Average rainfall days in September - Diamond, LA
  • Average rainfall days in September: 14.7 days

The month with the highest number of rainy days is August (20.3 days).
The month with the least rainy days is November (7 days).

Average snowfall days in September
Diamond, LA

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

The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in September: 10h and 1min

The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days in September
Diamond, LA

Average sunshine days in September - Diamond, LA
  • Average sunshine days in September: 11 days

The months with the most sunshine days are April and November (20.9 days).
The month with the least sunshine days is August (7.3 days).

Average UV index in September
Diamond, LA

Average UV index in September - Diamond, LA
  • Average UV index in September: 7

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).

Average cloud cover in September
Diamond, LA

Average cloud cover in September - Diamond, LA
  • Average cloud cover in September: 24

The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is May (Cloud cover 23).

Average visibility in September
Diamond, LA

Average visibility in September - Diamond, 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).

Diamond, Louisiana, USA

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