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
With September's arrival, O'Brien's weather changes as the average high-temperature falls from a very hot 97.3°F (36.3°C) in August to a tropical 87.4°F (30.8°C). In O'Brien, the expected average low-temperature for September is an agreeable 69.4°F (20.8°C).Heat index
The heat index value for September is estimated at a tropical 93.2°F (34°C). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.Consider that heat index readings are for situations in the shade and light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
May, September, November and December, with an average relative humidity of 56%, are the most humid months in O'Brien.Rainfall
In O'Brien, during September, the rain falls for 11.7 days and regularly aggregates up to 2.36" (60mm) of precipitation. Throughout the year, there are 92.6 rainfall days, and 17.99" (457mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In O'Brien, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:14 am and sunset at 8:04 pm. On the last day of September, in O'Brien, Texas, sunrise is at 7:33 am and sunset at 7:24 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In O'Brien, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Guard oneself from overexposure. Defence against sun injury is vital. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
How hot is September in O'Brien?
What is the most humid month in O'Brien?
What is the average humidity in September in O'Brien?
How much does it rain in O'Brien in September?
When it does not snow in O'Brien?
What is the average length of the day in September in O'Brien?
When is the sunrise / sunset in September in O'Brien?
How many hours of sunshine does O'Brien have in September?
How high is the UV index in September in O'Brien?
Average temperature in September
O'Brien, TX
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is August (97.3°F).
The months with the lowest average high temperature are January and December (55.4°F).
- Average low temperature in September: 69.4°F
The month with the highest average low temperature is July (77°F).
The coldest month (with the lowest average low temperature) is January (36.5°F).
Average pressure in September
O'Brien, 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
O'Brien, 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
O'Brien, TX
- Average humidity in September: 56%
The months with the highest relative humidity are May, September, November and December (56%).
The month with the lowest relative humidity is August (45%).
Average rainfall in September
O'Brien, TX
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (2.72").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in September
O'Brien, TX
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is September (11.7 days).
The month with the least rainy days is January (3.7 days).
Average snowfall in September
O'Brien, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
O'Brien, 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
O'Brien, 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 36min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
O'Brien, TX
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is January (26.3 days).
The month with the least sunshine days is September (16.3 days).
Average UV index in September
O'Brien, 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
O'Brien, 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
O'Brien, 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).
O'Brien, Texas, USA
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