September weather forecastMarathon, TX
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Marathon, Texas, with temperature in the range of an average high of 81.1°F (27.3°C) and an average low of 63.3°F (17.4°C).Temperature
The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a hot 88°F (31.1°C) to a warm 81.1°F (27.3°C). Throughout September in Marathon, a steady low-temperature average of 63.3°F (17.4°C) is noted.Heat index
For most parts of September, the heat index is calculated to be 82.4°F (28°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.Take note of the fact that heat index values are based on shaded circumstances with light airflows. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
With an average relative humidity of 56%, September is the most humid month in Marathon.Rainfall
September is the month with the most rainfall. Rain falls for 14 days and accumulates 2.01" (51mm) of precipitation.Snowfall
April through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 7:30 am and sunset at 8:15 pm. On the last day of September, in Marathon, sunrise is at 7:46 am and sunset at 7:39 pm CDT.
Sunshine
The average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September in Marathon is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 6 in September translates into the following instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total 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
Marathon, TX
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is June (90°F).
The month with the lowest average high temperature is January (56.8°F).
- Average low temperature in September: 63.3°F
The months with the highest average low temperature are July and August (69.4°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in September
Marathon, TX
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are May and June (29.84"Hg).
Average wind speed in September
Marathon, TX
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is September (7.6mph).
Average humidity in September
Marathon, TX
- Average humidity in September: 56%
The month with the highest relative humidity is September (56%).
The month with the lowest relative humidity is April (29%).
Average rainfall in September
Marathon, TX
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is September (2.01").
The driest month (with the least rainfall) is February (0.2").
Average rainfall days in September
Marathon, TX
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (2.2 days).
Average snowfall in September
Marathon, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Marathon, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (1.6 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Marathon, TX
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 42min).
Average sunshine days in September
Marathon, TX
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is January (26.8 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in September
Marathon, TX
- Average UV index in September: 6
The months with the highest UV index are May, June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Marathon, TX
- Average cloud cover in September: 22
The month with the most cloud cover is September (Cloud cover 22).
The month with the least cloud cover is June (Cloud cover 12).
Average visibility in September
Marathon, 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).
