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
September's arrival signals a moderate reduction in the average high-temperature, easing from a tropical 92.3°F (33.5°C) in August to a warm 83.8°F (28.8°C). Throughout September, the temperature in Allison tends to fall to a consistent average low of 64.4°F (18°C).Heat index
In September, the heat index is evaluated at a hot 86°F (30°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.Understanding the heat index involves considering values for shaded locales with light wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Humidity
In September, the average relative humidity is 55%.Rainfall
In September, in Allison, the rain falls for 9.6 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. In Allison, during the entire year, the rain falls for 89.4 days and collects up to 15.24" (387mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:13 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:25 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. 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
Is it hot during September?
What is the average humidity in September?
How many days does it rain in September in Allison?
When it does not snow?
Does it snow in September?
How many hours of daylight does Allison have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Allison, TX
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is July (93.4°F).
The month with the lowest average high temperature is December (48.7°F).
- Average low temperature in September: 64.4°F
The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in September
Allison, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Allison, TX
- Average wind speed in September: 11.8mph
The windiest month (with the highest average wind speed) is April (14.3mph).
The calmest months (with the lowest average wind speed) are January and August (10.7mph).
Average humidity in September
Allison, TX
- Average humidity in September: 55%
The month with the highest relative humidity is December (57%).
The month with the lowest relative humidity is July (49%).
Average rainfall in September
Allison, TX
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is May (2.17").
The driest month (with the least rainfall) is February (0.39").
Average rainfall days in September
Allison, TX
- Average rainfall days in September: 9.6 days
The months with the highest number of rainy days are July and August (12.2 days).
The month with the least rainy days is January (2.1 days).
Average snowfall in September
Allison, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Allison, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Allison, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Allison, TX
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is January (27 days).
The month with the least sunshine days is August (13.8 days).
Average UV index in September
Allison, TX
- Average UV index in September: 5
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 2).
Average cloud cover in September
Allison, TX
- Average cloud cover in September: 21
The month with the most cloud cover is April (Cloud cover 27).
The months with the least cloud cover are June and August (Cloud cover 17).
Average visibility in September
Allison, 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).
Allison, Texas, USA
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