September weather forecastO'Donnell, TX
September
Weather in September
The first month of the autumn, September, is still a warm month in O'Donnell, Texas, with an average temperature ranging between max 84°F (28.9°C) and min 64.9°F (18.3°C).Temperature
The transition into September is accompanied by a temperature decrease, with the average high-temperature shifting from a hot 93°F (33.9°C) in August to a moderately hot 84°F (28.9°C). O'Donnell experiences a consistent average temperature of 64.9°F (18.3°C) throughout the nights in September.Heat index
Throughout September, the heat index is estimated at a tropical 86°F (30°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
The most humid month is September, with an average relative humidity of 56%.Rainfall
The month with the most rainfall is September, when the rain falls for 12 days and typically aggregates up to 2.09" (53mm) of precipitation.Snowfall
In O'Donnell, snow does not fall in April through September.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 7:22 am and sunset at 8:11 pm. On the last day of September, in O'Donnell, sunrise is at 7:41 am and sunset at 7:32 pm CDT.
Sunshine
The average sunshine in September in O'Donnell is 8.9h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
O'Donnell, TX
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is August (93°F).
The month with the lowest average high temperature is December (53.6°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).
Average pressure in September
O'Donnell, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
O'Donnell, TX
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is April (13.2mph).
The calmest month (with the lowest average wind speed) is August (9.4mph).
Average humidity in September
O'Donnell, 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 (39%).
Average rainfall in September
O'Donnell, TX
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is September (2.09").
The driest month (with the least rainfall) is February (0.35").
Average rainfall days in September
O'Donnell, TX
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is September (12 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
O'Donnell, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
O'Donnell, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (2.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
O'Donnell, 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 54min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
O'Donnell, TX
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is January (27.3 days).
The month with the least sunshine days is September (15.5 days).
Average UV index in September
O'Donnell, 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
O'Donnell, TX
- Average cloud cover in September: 24
The month with the most cloud cover is September (Cloud cover 24).
The months with the least cloud cover are June and August (Cloud cover 15).
Average visibility in September
O'Donnell, 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).
