September weather forecastBellevue, TX
September
Weather in September
September, the first month of the autumn in Bellevue, is still a tropical month, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 67.8°F (19.9°C).Temperature
The transition into September subtly indicates a reduction in the average high-temperature, down to a hot 86.5°F (30.3°C) from August's torrid 95.5°F (35.3°C). September brings an average low-temperature of 67.8°F (19.9°C) to Bellevue.Heat index
September's heat index is appraised at a tropical 93.2°F (34°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Humidity
In September, the average relative humidity in Bellevue is 64%.Rainfall
In September, the rain falls for 12 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. In Bellevue, during the entire year, the rain falls for 112.1 days and collects up to 16.3" (414mm) of precipitation.Snowfall
April through November are months without snowfall in Bellevue.Daylight
In Bellevue, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 7:06 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:17 pm CDT.
Sunshine
In Bellevue, Texas, the average sunshine in September is 8.5h.UV index
In Bellevue, 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 ordinary individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bellevue, TX
- Average high temperature in September: 86.5°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The months with the lowest average high temperature are January and December (53.6°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is August (74.5°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).
Average pressure in September
Bellevue, 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 (29.88"Hg).
Average wind speed in September
Bellevue, TX
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is September (7.6mph).
Average humidity in September
Bellevue, TX
- Average humidity in September: 64%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Bellevue, TX
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is May (2.24").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Bellevue, TX
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (5.3 days).
Average snowfall in September
Bellevue, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Bellevue, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.9 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
Bellevue, 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 July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in September
Bellevue, TX
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is May (14.6 days).
Average UV index in September
Bellevue, 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 and December (UV index 3).
Average cloud cover in September
Bellevue, TX
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is August (Cloud cover 18).
Average visibility in September
Bellevue, 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).
