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
Onset of September comes with a temperature decline, the average high falling from a fiery hot 97.3°F (36.3°C) in August to a hot 87.6°F (30.9°C). Throughout the month of September, the nighttime temperature dips to an average of 69.4°F (20.8°C).Heat index
The average heat index in September is evaluated at a tropical 93.2°F (34°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are primarily vital 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.
Humidity
The average relative humidity in September is 56%.Rainfall
In Knox City, during September, the rain falls for 11.8 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Knox City, during the entire year, the rain falls for 92.8 days and collects up to 17.4" (442mm) of precipitation.Snowfall
In Knox City, snow does not fall in May through October.Daylight
The average length of the day in September in Knox City is 12h and 22min.On the first day of the month, sunrise is at 7:13 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:24 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In Knox City, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 6 in September translates into these instructions:
Shun overexposure. Protection from sun ravages is indispensable. 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. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Knox City have in September?
When are sunrise and sunset in September in Knox City?
How long on average sun shines in September in Knox City?
What is the UV index intensity in September?
Average temperature in September
Knox City, TX
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (97.3°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in September: 69.4°F
The month with the highest average low temperature is July (76.8°F).
The coldest month (with the lowest average low temperature) is January (36.5°F).
Average pressure in September
Knox City, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Knox City, TX
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (13mph).
The calmest month (with the lowest average wind speed) is September (9.4mph).
Average humidity in September
Knox City, TX
- Average humidity in September: 56%
The month with the highest relative humidity is December (57%).
The month with the lowest relative humidity is August (45%).
Average rainfall in September
Knox City, TX
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in September
Knox City, TX
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is September (11.8 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in September
Knox City, TX
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Knox City, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Knox City, 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 4min
The month with the most sunshine is June (Average sunshine: 11h and 24min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).
Average sunshine days in September
Knox City, TX
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is January (26.3 days).
The month with the least sunshine days is September (16.2 days).
Average UV index in September
Knox City, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Knox City, TX
- Average cloud cover in September: 26
The month with the most cloud cover is March (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in September
Knox City, 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).
Knox City, Texas, USA
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