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
The onset of September results in a small decrease in the average high-temperature, moderately receding from 92.8°F (33.8°C) in August to a still hot 86.7°F (30.4°C). A sharp reduction from the daytime highs is witnessed in Alpine during September, with nighttime temperatures averaging a low of 64.9°F (18.3°C).Heat index
September's heat index is computed to be a fiery hot 96.8°F (36°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
The months with the lowest humidity in Alpine are July through October, with an average relative humidity of 71%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.6 days and typically collects 1.14" (29mm) of precipitation.Snowfall
March through December are months without snowfall.Daylight
In September, the average length of the day in Alpine, Arkansas, is 12h and 22min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:39 pm. On the last day of September, in Alpine, sunrise is at 7:07 am and sunset at 6:58 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 6 during September leads to these instructions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
Is it hot in Alpine during September?
What is the least humid month in Alpine?
What is the average humidity in September in Alpine?
What is the driest month in Alpine?
How many days does it rain in September in Alpine?
When it does not snow in Alpine?
How many hours of daylight does Alpine have in September?
What time are sunrise and sunset in September in Alpine?
How many hours of sunshine does Alpine have in September?
What is the UV index reading in September in Alpine?
Average temperature in September
Alpine, AR
- Average high temperature in September: 86.7°F
The warmest month (with the highest average high temperature) is July (93.2°F).
The month with the lowest average high temperature is January (50.5°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Alpine, AR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Alpine, AR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Alpine, AR
- Average humidity in September: 71%
The months with the highest relative humidity are February, March and December (80%).
The months with the lowest relative humidity are July, August, September and October (71%).
Average rainfall in September
Alpine, AR
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is April (2.52").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in September
Alpine, AR
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is August (14.3 days).
The month with the least rainy days is October (7.9 days).
Average snowfall in September
Alpine, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.43").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Alpine, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 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
Alpine, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Alpine, AR
- Average sunshine days in September: 17 days
The month with the most sunshine days is October (21.8 days).
The month with the least sunshine days is August (13.8 days).
Average UV index in September
Alpine, AR
- Average UV index in September: 6
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
Alpine, AR
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Alpine, AR
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
Alpine, Arkansas, USA
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