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
The shift from August to September coincides with a small decrease in the average high-temperature, down to a tropical 88.7°F (31.5°C) from a torrid 95.5°F (35.3°C). In Washington, an average low-temperature of 70.5°F (21.4°C) is recorded during September nights.Heat index
September's mean heat index is estimated at a scorching 104°F (40°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.Be advised, the heat index considers values for conditions in shade and with a light breeze. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.
Humidity
In September, the average relative humidity in Washington, Texas, is 73%.Rainfall
In Washington, in September, during 16.5 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. In Washington, during the entire year, the rain falls for 163.6 days and collects up to 30.71" (780mm) of precipitation.Snowfall
February through November are months without snowfall.Daylight
In September, the average length of the day in Washington is 12h and 20min.On the first day of the month, sunrise is at 7:01 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:10 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In Washington, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Washington have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Washington, TX
- Average high temperature in September: 88.7°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (58.8°F).
- Average low temperature in September: 70.5°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (42.6°F).
Average pressure in September
Washington, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Washington, TX
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are February and March (8.3mph).
The calmest month (with the lowest average wind speed) is September (5.7mph).
Average humidity in September
Washington, TX
- Average humidity in September: 73%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (67%).
Average rainfall in September
Washington, TX
- Average rainfall in September: 2.83"
The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in September
Washington, TX
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is September (16.5 days).
The month with the least rainy days is January (10.7 days).
Average snowfall in September
Washington, TX
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Washington, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Washington, TX
- Average daylight in September: 12h and 2min
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: 8h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Washington, TX
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is October (17.5 days).
The month with the least sunshine days is June (11 days).
Average UV index in September
Washington, 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 3).
Average cloud cover in September
Washington, TX
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Washington, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, August, September, October, November and December (6mi).
The months with the lowest visibility are April, May, June and July (5mi).
Washington, Texas, USA
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