September weather forecastDenison, TX
September
Weather in September
The first month of the autumn, September, is still a tropical month in Denison, Texas, with an average temperature ranging between max 86°F (30°C) and min 67.3°F (19.6°C).Temperature
September indicates a minor shift in the average high-temperature, from August's 93.9°F (34.4°C) to a still hot 86°F (30°C). The average low-temperature in Denison, Texas, during September nights is a refreshing 67.3°F (19.6°C).Heat index
September's average heat index is evaluated at a tropical 93.2°F (34°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. 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 'felt air temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
The average relative humidity in September in Denison is 66%.Rainfall
In Denison, in September, it is raining for 13.5 days, with typically 3.31" (84mm) of accumulated precipitation. Throughout the year, there are 139.5 rainfall days, and 32.72" (831mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Denison.Daylight
In Denison, Texas, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:00 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:11 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Denison, Texas, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 6 suggests this advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Denison, TX
- Average high temperature in September: 86°F
The warmest month (with the highest average high temperature) is August (93.9°F).
The month with the lowest average high temperature is January (51.8°F).
- Average low temperature in September: 67.3°F
The month with the highest average low temperature is July (74.1°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).
Average pressure in September
Denison, 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
Denison, TX
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest months (with the lowest average wind speed) are July, August and September (7mph).
Average humidity in September
Denison, TX
- Average humidity in September: 66%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is August (60%).
Average rainfall in September
Denison, TX
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the least rainfall) is January (1.77").
Average rainfall days in September
Denison, TX
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in September
Denison, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Denison, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 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
Denison, TX
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 30min
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 30min).
Average sunshine days in September
Denison, TX
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (22.1 days).
The month with the least sunshine days is May (14 days).
Average UV index in September
Denison, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in September
Denison, TX
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Denison, 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).
