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
September is characterized by a mild reduction in the average high-temperature, from a sweltering 95°F (35°C) in August to a tropical 88.7°F (31.5°C). Zwolle witnesses an average low-temperature of 68°F (20°C) throughout the month of September.Heat index
In September, the average heat index is estimated at a blisteringly hot 104°F (40°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In Zwolle, the average relative humidity in September is 73%.Rainfall
In Zwolle, Louisiana, during September, the rain falls for 14 days and regularly aggregates up to 2.8" (71mm) of precipitation. Throughout the year, there are 159.7 rainfall days, and 36.14" (918mm) of precipitation is accumulated.Snowfall
In Zwolle, snow does not fall in March through November.Daylight
In Zwolle, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 6:50 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 7:00 pm CDT.
Sunshine
In Zwolle, 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 hazard from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 6 during September leads to these instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
Is it hot in Zwolle during September?
What is the average humidity in September in Zwolle?
How many days does it rain in September in Zwolle?
When it does not snow in Zwolle?
What is the average length of the day in September in Zwolle?
What time are sunrise and sunset in September in Zwolle?
How long on average sun shines in September in Zwolle?
What is the UV index intensity in September in Zwolle?
Average temperature in September
Zwolle, LA
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (55.9°F).
- Average low temperature in September: 68°F
The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).
Average pressure in September
Zwolle, LA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Zwolle, LA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).
Average humidity in September
Zwolle, LA
- Average humidity in September: 73%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are August and October (71%).
Average rainfall in September
Zwolle, LA
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in September
Zwolle, LA
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is August (16 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in September
Zwolle, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.2").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Zwolle, 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, October and November (0 days).
Average daylight in September /
Average sunshine in September
Zwolle, 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
Zwolle, LA
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is February (12.4 days).
Average UV index in September
Zwolle, 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
Zwolle, LA
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Zwolle, LA
- Average visibility in September: 5mi
The months with the highest visibility are June, August, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, September and December (5mi).
Zwolle, Louisiana, USA
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