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
With the onset of September, Keller's climate undergoes a slight change as the average high-temperature moves from a very hot 95.9°F (35.5°C) in August to a tropical 87.4°F (30.8°C). Keller's nighttime temperature during September is consistently averaged at an agreeable 69.6°F (20.9°C).Heat index
September's mean heat index is calculated to be a torrid 95°F (35°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.Heat index details are generally centered around shaded locations and a mild breeze. 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 'felt air temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
In September, the average relative humidity is 63%.Rainfall
In September, in Keller, Texas, the rain falls for 10.7 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. Throughout the year, there are 100.6 rainfall days, and 13.94" (354mm) of precipitation is accumulated.Snowfall
January, April through November are months without snowfall in Keller.Daylight
In Keller, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 7:03 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 7:14 pm CDT.
Sunshine
In September, the average sunshine in Keller is 8.5h.UV index
In Keller, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
How hot is September in Keller?
What is the average humidity in September in Keller?
How much does it rain in Keller in September?
When it does not snow in Keller?
What is the average length of the day in September in Keller?
What time are sunrise and sunset in September in Keller?
How many hours of sunshine does Keller have in September?
What is the UV index intensity in September in Keller?
Average temperature in September
Keller, TX
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (54.5°F).
- Average low temperature in September: 69.6°F
The months with the highest average low temperature are July and August (75.7°F).
The coldest month (with the lowest average low temperature) is January (38.3°F).
Average pressure in September
Keller, 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 (29.9"Hg).
Average wind speed in September
Keller, TX
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in September
Keller, 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 (55%).
Average rainfall in September
Keller, TX
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.55").
Average rainfall days in September
Keller, TX
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (11.9 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Keller, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.31").
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Keller, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are January, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Keller, 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 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Keller, TX
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is January (26.2 days).
The month with the least sunshine days is May (15.9 days).
Average UV index in September
Keller, 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
Keller, TX
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Keller, 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).
Keller, Texas, USA
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