Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the start of September, Lafayette measures an average high-temperature of a still hot 86.7°F (30.4°C), not significantly differing from August's 90°F (32.2°C). Throughout the month of September, Lafayette sees a steady low-temperature average of 70.5°F (21.4°C).Heat index
During September, the heat index is evaluated at a torrid 102.2°F (39°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', comes about by integrating the temperature readings with the humidity levels. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
In Lafayette, the average relative humidity in September is 79%.Rainfall
In Lafayette, in September, it is raining for 14.9 days, with typically 1.38" (35mm) of accumulated precipitation. Throughout the year, there are 143.3 rainfall days, and 17.91" (455mm) of precipitation is accumulated.Snowfall
In Lafayette, snow does not fall in February through December.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:45 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:54 pm CDT.
Sunshine
In Lafayette, the average sunshine in September is 9.9h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September in Lafayette?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Lafayette have in September?
When are sunrise and sunset in September in Lafayette?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Lafayette, LA
- Average high temperature in September: 86.7°F
The warmest month (with the highest average high temperature) is August (90°F).
The month with the lowest average high temperature is January (58.8°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in September
Lafayette, LA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Lafayette, LA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is February (8.2mph).
The calmest months (with the lowest average wind speed) are July, August and September (5.3mph).
Average humidity in September
Lafayette, LA
- Average humidity in September: 79%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Lafayette, LA
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is March (0.83").
Average rainfall days in September
Lafayette, LA
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is August (20 days).
The months with the least rainy days are January and November (7.8 days).
Average snowfall days in September
Lafayette, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 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
Lafayette, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Lafayette, LA
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (8 days).
Average UV index in September
Lafayette, LA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Lafayette, LA
- Average cloud cover in September: 29
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 25).
Average visibility in September
Lafayette, 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).
Lafayette, Louisiana, USA
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