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 coincides with a soft drop in the average high-temperature, subtly decreasing from August's tropical 91.4°F (33°C) to a moderately hot 84°F (28.9°C). Altus registers a pronounced decline from daytime peak temperatures, averaging a refreshing 62.4°F (16.9°C) lows in September.Heat index
During September, the heat index is evaluated at a tropical 91.4°F (33°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.Heat index guidelines indicate values are for light wind scenarios and shaded regions. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity is 72%.Rainfall
In September, in Altus, Arkansas, the rain falls for 9.8 days. Throughout September, 2.36" (60mm) of precipitation is accumulated. In Altus, during the entire year, the rain falls for 139.2 days and collects up to 34.57" (878mm) of precipitation.Snowfall
In Altus, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:47 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:59 pm CDT.
Sunshine
The average sunshine in September in Altus is 9.3h.UV index
In Altus, Arkansas, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 during September translates into the following guidance:
Act with care - The suggestion to avoid sunburn is emphasized. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
Is it hot in Altus during September?
What is the average humidity in September in Altus?
How many days does it rain in September in Altus?
When it does not snow in Altus?
What is the average length of the day in September in Altus?
When are sunrise and sunset in September in Altus?
How many hours of sunshine does Altus have in September?
What is the UV index intensity in September in Altus?
Average temperature in September
Altus, AR
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (92.7°F).
The month with the lowest average high temperature is January (46.9°F).
- Average low temperature in September: 62.4°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).
Average pressure in September
Altus, AR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Altus, AR
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is July (4.4mph).
Average humidity in September
Altus, AR
- Average humidity in September: 72%
The months with the highest relative humidity are March and May (78%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Altus, AR
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is July (2.17").
Average rainfall days in September
Altus, AR
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is March (15.2 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Altus, AR
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.71").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Altus, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.7 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
Altus, AR
- 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 month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Altus, AR
- Average sunshine days in September: 18.3 days
The month with the most sunshine days is December (20.1 days).
The month with the least sunshine days is April (13.8 days).
Average UV index in September
Altus, AR
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Altus, AR
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Altus, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are April and May (5mi).
Altus, Arkansas, USA
Weather forecast for your location
2. Allow the app to use your location
