September weather forecastSan Angelo, TX
September
Weather in September
As summer draws to a close, September introduces an initial taste of autumn. While it’s still summer-hot during the day, night-time temperatures drop to a cool 69.3°F (20.7°C), making after-dark outdoor ventures pleasant outings. Portraying a gradual shift from the oppressively hot summer, September brings back mild days and comfortably cool nights. It remains a perfect time to explore the local area or participate in community activities, under the mellow fall sun. The easing weather conditions set the stage for the official arrival of autumn and cooler months ahead.Temperature
The beginning of September in San Angelo brings a slight decrease in the average high-temperature, transitioning from a torrid 95.7°F (35.4°C) in August to a hot 87.4°F (30.8°C). An average temperature of 69.3°F (20.7°C) is recorded during the nights in September.Heat index
September's average heat index is computed to be a tropical 93.2°F (34°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.It is essential to grasp that the heat index's numbers are for shade and light wind settings. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
In San Angelo, the average relative humidity in September is 57%.Rainfall
In San Angelo, in September, during 11.3 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, there are 89.7 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
In San Angelo, snow does not fall in April through October.Daylight
In San Angelo, the average length of the day in September is 12h and 21min.On the first day of the month, sunrise is at 7:18 am and sunset at 8:04 pm. On the last day of September, in San Angelo, Texas, sunrise is at 7:35 am and sunset at 7:27 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In San Angelo, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 6 translates into these guidelines:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
San Angelo, TX
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is August (95.7°F).
The month with the lowest average high temperature is December (58.6°F).
- Average low temperature in September: 69.3°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).
Average pressure in September
San Angelo, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in September
San Angelo, TX
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (13.5mph).
The calmest month (with the lowest average wind speed) is September (9.4mph).
Average humidity in September
San Angelo, TX
- Average humidity in September: 57%
The month with the highest relative humidity is November (58%).
The month with the lowest relative humidity is August (46%).
Average rainfall in September
San Angelo, TX
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is October (2.4").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
San Angelo, TX
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (11.6 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in September
San Angelo, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
San Angelo, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1 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
San Angelo, TX
- Average daylight in September: 12h and 18min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in September
San Angelo, TX
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is January (26 days).
The month with the least sunshine days is May (16.8 days).
Average UV index in September
San Angelo, TX
- Average UV index in September: 6
The month with the highest UV index is July (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
San Angelo, TX
- Average cloud cover in September: 27
The months with the most cloud cover are March and September (Cloud cover 27).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
San Angelo, 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).
