September weather forecastYorktown, TX
September
Weather in September
September, the first month of the autumn in Yorktown, is still a tropical month, with an average temperature varying between 72.5°F (22.5°C) and 89.2°F (31.8°C).Temperature
Yorktown's September weather shows a modest shift in high-temperatures, falling from August's torrid 96.3°F (35.7°C) to a hot 89.2°F (31.8°C). Throughout September, an average low-temperature of 72.5°F (22.5°C) is experienced.Heat index
For most parts of September, the heat index is estimated at a blistering 105.8°F (41°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.
Humidity
In September, the average relative humidity is 73%.Rainfall
September is the month with the most rainfall. Rain falls for 16 days and accumulates 2.05" (52mm) of precipitation.Snowfall
In Yorktown, snow does not fall in January, March through December.Daylight
In Yorktown, the average length of the day in September is 12h and 19min.On the first day of the month, sunrise is at 7:08 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:16 pm CDT.
Sunshine
The average sunshine in September is 8.2h.UV index
In Yorktown, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yorktown, TX
- Average high temperature in September: 89.2°F
The warmest month (with the highest average high temperature) is August (96.3°F).
The month with the lowest average high temperature is January (62.2°F).
- Average low temperature in September: 72.5°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 (45.3°F).
Average pressure in September
Yorktown, TX
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Yorktown, TX
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is May (9.3mph).
The calmest month (with the lowest average wind speed) is September (6.6mph).
Average humidity in September
Yorktown, TX
- Average humidity in September: 73%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Yorktown, TX
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is September (2.05").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days in September
Yorktown, TX
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is September (16 days).
The month with the least rainy days is February (7.5 days).
Average snowfall in September
Yorktown, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Yorktown, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.2 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
Yorktown, TX
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).
Average sunshine days in September
Yorktown, TX
- Average sunshine days in September: 13 days
The month with the most sunshine days is January (21.7 days).
The month with the least sunshine days is September (13 days).
Average UV index in September
Yorktown, TX
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Yorktown, TX
- Average cloud cover in September: 36
The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Yorktown, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, August, September, October, November and December (6mi).
The months with the lowest visibility are June and July (5mi).
