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
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's torrid 96.1°F (35.6°C) to a tropical 89.4°F (31.9°C). During September in Onalaska, the average low-temperature is recorded at an agreeable 69.4°F (20.8°C).Heat index
The heat index value during September is calculated to be a blistering 107.6°F (42°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
The average relative humidity in September in Onalaska is 74%.Rainfall
In Onalaska, during September, the rain falls for 16.1 days and regularly aggregates up to 2.95" (75mm) of precipitation. In Onalaska, during the entire year, the rain falls for 163.9 days and collects up to 30.28" (769mm) of precipitation.Snowfall
March through November are months without snowfall.Daylight
In Onalaska, the average length of the day in September is 12h and 20min.On the first day of September in Onalaska, sunrise is at 6:57 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:06 pm CDT.
Sunshine
In Onalaska, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
How hot is it in Onalaska in September?
What is the average humidity in September in Onalaska?
How much does it rain in Onalaska in September?
When it does not snow in Onalaska?
How many hours of daylight does Onalaska have in September?
When is the sunrise / sunset in September in Onalaska?
How long on average sun shines in September in Onalaska?
What is the UV index reading in September in Onalaska?
Average temperature in September
Onalaska, TX
- Average high temperature in September: 89.4°F
The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 69.4°F
The months with the highest average low temperature are July and August (73.8°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Onalaska, TX
- 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 (29.93"Hg).
Average wind speed in September
Onalaska, TX
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest months (with the lowest average wind speed) are August and September (4.8mph).
Average humidity in September
Onalaska, TX
- Average humidity in September: 74%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Onalaska, TX
- Average rainfall in September: 2.95"
The wettest month (with the highest rainfall) is May (4.02").
The driest month (with the least rainfall) is November (1.69").
Average rainfall days in September
Onalaska, TX
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is September (16.1 days).
The month with the least rainy days is October (10.7 days).
Average snowfall in September
Onalaska, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Onalaska, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Onalaska, TX
- 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: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Onalaska, TX
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Onalaska, TX
- 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
Onalaska, TX
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Onalaska, TX
- Average visibility in September: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, September, October, November and December (5mi).
Onalaska, Texas, USA
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