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 start of September in Plano comes with a small reduction in the average high-temperature, subtly receding from a sweltering 95.5°F (35.3°C) in August to a tropical 87.6°F (30.9°C). During the month of September, the temperature falls to an average of 70°F (21.1°C).Heat index
For September, the heat index is estimated at a very hot 95°F (35°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.
Humidity
The average relative humidity in September is 63%.Rainfall
In Plano, Texas, during September, the rain falls for 14.5 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Plano, during the entire year, the rain falls for 143 days and collects up to 33.15" (842mm) of precipitation.Snowfall
In Plano, snow does not fall in March through October.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:01 am and sunset at 7:51 pm. On the last day of September, in Plano, sunrise is at 7:20 am and sunset at 7:12 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In September, the average daily maximum UV index in Plano, Texas, is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 6 in September translates into the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Frequently asked questions
How hot is it in Plano in September?
What is the average humidity in September in Plano?
How much does it rain in Plano in September?
When it does not snow in Plano?
How many hours of daylight does Plano have in September?
When is the sunrise / sunset in September in Plano?
How many hours of sunshine does Plano have in September?
What is the UV index intensity in September in Plano?
Average temperature in September
Plano, TX
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (54°F).
- Average low temperature in September: 70°F
The month with the highest average low temperature is July (76.1°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).
Average pressure in September
Plano, TX
- 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 (29.91"Hg).
Average wind speed in September
Plano, TX
- Average wind speed in September: 6.8mph
The windiest months (with the highest average wind speed) are March and April (9.9mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in September
Plano, TX
- Average humidity in September: 63%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Plano, TX
- Average rainfall in September: 2.76"
The wettest month (with the highest rainfall) is October (4.21").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in September
Plano, TX
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in September
Plano, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in September
Plano, 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
Plano, 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 August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Plano, TX
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is April (13.9 days).
Average UV index in September
Plano, 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
Plano, TX
- Average cloud cover in September: 29
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Plano, 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).
Plano, Texas, USA
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