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 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
A mild drop in Calvin's average high-temperature is observed in September, transitioning from 94.1°F (34.5°C) in August to a still tropical 88.3°F (31.3°C). Throughout September nights, Calvin registers an average low-temperature of 67.8°F (19.9°C).Heat index
In September, the heat index is estimated at a sweltering 102.2°F (39°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. 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
In Calvin, in September, it is raining for 12.1 days, with typically 1.1" (28mm) of accumulated precipitation. In Calvin, during the entire year, the rain falls for 130.3 days and collects up to 16.42" (417mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In Calvin, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 6:46 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:56 pm CDT.
Sunshine
In Calvin, Louisiana, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 6 in September transforms into this advice:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September in Calvin?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Calvin have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Calvin have in September?
What is the UV index intensity in September?
Average temperature in September
Calvin, LA
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is July (94.3°F).
The month with the lowest average high temperature is January (55.2°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).
Average pressure in September
Calvin, LA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Calvin, LA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in September
Calvin, LA
- Average humidity in September: 73%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Calvin, LA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is August (1.85").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in September
Calvin, LA
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is August (14.6 days).
The month with the least rainy days is November (6.6 days).
Average snowfall in September
Calvin, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Calvin, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.6 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
Calvin, 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 12min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Calvin, LA
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is October (21.7 days).
The month with the least sunshine days is August (13.2 days).
Average UV index in September
Calvin, 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
Calvin, LA
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Calvin, LA
- Average visibility in September: 5mi
The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).
Calvin, Louisiana, USA
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