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
Keene, Texas, in September undergoes a slight reduction in the average high-temperature, shifting from August's sweltering 95.5°F (35.3°C) to a hot 87.3°F (30.7°C). Nighttime temperatures hover around an average low of 69.1°F (20.6°C) in September.Heat index
September's average heat index is estimated at a torrid 95°F (35°C). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.
Humidity
The average relative humidity in September is 65%.Rainfall
In Keene, during September, the rain falls for 13.9 days and regularly aggregates up to 2.8" (71mm) of precipitation. In Keene, during the entire year, the rain falls for 135 days and collects up to 29.92" (760mm) of precipitation.Snowfall
In Keene, snow does not fall in January, April through October and December.Daylight
In Keene, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 7:04 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:14 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September in Keene?
When it does not snow?
How many hours of daylight does Keene have in September?
What time are sunrise and sunset in September in Keene?
How many hours of sunshine does Keene have in September?
What is the UV index reading in September?
Average temperature in September
Keene, TX
- Average high temperature in September: 87.3°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 (55.8°F).
- Average low temperature in September: 69.1°F
The month with the highest average low temperature is August (75.6°F).
The coldest month (with the lowest average low temperature) is January (39°F).
Average pressure in September
Keene, 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
Keene, TX
- Average wind speed in September: 6.8mph
The windiest months (with the highest average wind speed) are March and April (10.6mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in September
Keene, TX
- Average humidity in September: 65%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (57%).
Average rainfall in September
Keene, TX
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is October (4.21").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days in September
Keene, TX
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in September
Keene, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are January, April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Keene, 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
Keene, TX
- 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: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Keene, TX
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is May (13.4 days).
Average UV index in September
Keene, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Keene, TX
- Average cloud cover in September: 30
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Keene, 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).
Keene, Texas, USA
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