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 reveals a small adjustment in temperature, transitioning from an average high of a very hot 95.2°F (35.1°C) in August to a hot 86.9°F (30.5°C). An average low-temperature of 68.4°F (20.2°C) marks the month of September.Heat index
The heat index in September is calculated to be a very hot 95°F (35°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.Heat index determinations are made taking into account the shade and light air movements. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
In September, the average relative humidity is 64%.Rainfall
In Dennis, in September, it is raining for 13.4 days, with typically 2.6" (66mm) of accumulated precipitation. In Dennis, during the entire year, the rain falls for 127.7 days and collects up to 26.46" (672mm) of precipitation.Snowfall
In Dennis, snow does not fall in April through October.Daylight
In September, the average length of the day in Dennis is 12h and 22min.On the first day of the month, sunrise is at 7:07 am and sunset at 7:55 pm. On the last day of September, in Dennis, sunrise is at 7:25 am and sunset at 7:17 pm CDT.
Sunshine
In Dennis, Texas, the average sunshine in September is 8.5h.UV index
In Dennis, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: During September, 6 as the daily maximum UV index converts into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
How hot is it in Dennis in September?
What is the average humidity in September in Dennis?
How much does it rain in Dennis in September?
When it does not snow in Dennis?
How many hours of daylight does Dennis have in September?
When is the sunrise / sunset in September in Dennis?
How long on average sun shines in September in Dennis?
What is the UV index reading in September in Dennis?
Average temperature in September
Dennis, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (55°F).
- Average low temperature in September: 68.4°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 (37.9°F).
Average pressure in September
Dennis, 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 (29.89"Hg).
Average wind speed in September
Dennis, TX
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in September
Dennis, TX
- Average humidity in September: 64%
The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Dennis, TX
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is October (3.58").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Dennis, TX
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in September
Dennis, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Dennis, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Dennis, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Dennis, TX
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (23.9 days).
The month with the least sunshine days is September (14.5 days).
Average UV index in September
Dennis, 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
Dennis, TX
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Dennis, TX
- 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).
Dennis, Texas, USA
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