September weather forecastCollinsville, TX
September
Weather in September
The first month of the autumn, September, is also a hot month in Collinsville, Texas, with an average temperature varying between 86°F (30°C) and 68°F (20°C).Temperature
The commencement of September indicates a gentle shift in the average high-temperature, receding from August's tropical 94.6°F (34.8°C) to a still hot 86°F (30°C). Collinsville experiences a steady low-temperature of 68°F (20°C) throughout September.Heat index
The heat index in September is calculated to be a tropical 93.2°F (34°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.Consider that heat index readings are for situations in the shade and light wind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
In September, the average relative humidity in Collinsville is 66%.Rainfall
In Collinsville, Texas, in September, it is raining for 8.5 days, with typically 0.63" (16mm) of accumulated precipitation. In Collinsville, during the entire year, the rain falls for 77.1 days and collects up to 7.05" (179mm) of precipitation.Snowfall
In Collinsville, Texas, snow does not fall in January, March through December.Daylight
In September, the average length of the day in Collinsville is 12h and 22min.On the first day of September in Collinsville, sunrise is at 7:02 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:12 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In Collinsville, Texas, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 6 in September interprets into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Collinsville, TX
- Average high temperature in September: 86°F
The warmest month (with the highest average high temperature) is August (94.6°F).
The month with the lowest average high temperature is January (52.2°F).
- Average low temperature in September: 68°F
The months with the highest average low temperature are July and August (74.3°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).
Average pressure in September
Collinsville, 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
Collinsville, TX
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is March (10.4mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in September
Collinsville, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (76%).
The month with the lowest relative humidity is August (59%).
Average rainfall in September
Collinsville, TX
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is October (0.98").
The driest months (with the least rainfall) are February and December (0.31").
Average rainfall days in September
Collinsville, TX
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (9 days).
The month with the least rainy days is January (3 days).
Average snowfall in September
Collinsville, 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
Collinsville, 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 April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Collinsville, TX
- Average daylight in September: 12h and 24min
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 36min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Collinsville, TX
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is January (27.1 days).
The months with the least sunshine days are May and September (19.4 days).
Average UV index in September
Collinsville, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Collinsville, TX
- Average cloud cover in September: 27
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Collinsville, 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).
