September weather forecastMission, TX
September
Weather in September
The first month of the autumn, September, is also a hot month in Mission, Texas, with an average temperature ranging between min 77.2°F (25.1°C) and max 92.7°F (33.7°C).Temperature
Mission's weather subtly changes with the onset of September, barely falling from a sweltering 99°F (37.2°C) in August to a hot 92.7°F (33.7°C). Throughout the month of September, Mission witnesses an average low-temperature of 77.2°F (25.1°C).Heat index
September's heat index is calculated to be a blisteringly hot 109.4°F (43°C). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.Heat index's context suggests values are appropriate for shady areas and slight breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
In September, the average relative humidity in Mission, Texas, is 64%.Rainfall
In Mission, in September, it is raining for 11.3 days, with typically 0.47" (12mm) of accumulated precipitation. In Mission, during the entire year, the rain falls for 68.7 days and collects up to 3.62" (92mm) of precipitation.Snowfall
In Mission, snow does not fall in March through December.Daylight
In Mission, the average length of the day in September is 12h and 18min.On the first day of the month, sunrise is at 7:13 am and sunset at 7:52 pm. On the last day of September, in Mission, sunrise is at 7:25 am and sunset at 7:20 pm CDT.
Sunshine
In September, the average sunshine in Mission is 8.6h.UV index
In Mission, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the average person.Note: A maximum high daily UV index of 7 during September translates into the following directions:
Deflect overexposure. Sun protection is a necessity. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mission, TX
- Average high temperature in September: 92.7°F
The warmest month (with the highest average high temperature) is August (99°F).
The month with the lowest average high temperature is January (69.4°F).
- Average low temperature in September: 77.2°F
The month with the highest average low temperature is August (79.9°F).
The coldest month (with the lowest average low temperature) is January (53.2°F).
Average pressure in September
Mission, TX
- Average pressure in September: 29.91"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in September
Mission, TX
- Average wind speed in September: 9.3mph
The windiest months (with the highest average wind speed) are May and July (12.9mph).
The calmest month (with the lowest average wind speed) is September (9.3mph).
Average humidity in September
Mission, TX
- Average humidity in September: 64%
The months with the highest relative humidity are May and December (67%).
The month with the lowest relative humidity is August (58%).
Average rainfall in September
Mission, TX
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is July (0.71").
The driest months (with the least rainfall) are February and December (0.12").
Average rainfall days in September
Mission, TX
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is September (11.3 days).
The month with the least rainy days is February (2.9 days).
Average snowfall days in September
Mission, TX
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Mission, TX
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Mission, TX
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is March (24.9 days).
The month with the least sunshine days is September (15.6 days).
Average UV index in September
Mission, TX
- Average UV index in September: 7
The months with the highest UV index are July and August (UV index 8).
The month with the lowest UV index is December (UV index 4).
Average cloud cover in September
Mission, TX
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Mission, 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).
