September weather forecastHalliday, AR
September
Weather in September
September, the first month of the autumn in Halliday, is still a warm month, with an average temperature fluctuating between 63.9°F (17.7°C) and 81.9°F (27.7°C).Temperature
The advent of September denotes an average high-temperature of a moderately hot 81.9°F (27.7°C), subtly different from August's 86.9°F (30.5°C). An average low-temperature of 63.9°F (17.7°C) marks the month of September.Heat index
The average heat index in September is appraised at a tropical 86°F (30°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. 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 'apparent temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In Halliday, the average relative humidity in September is 73%.Rainfall
The months with the least rainfall in Halliday are September and December Rain falls for 7 days and accumulates 0.47" (12mm) of rain.Snowfall
In Halliday, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:34 am and sunset at 7:29 pm. On the last day of September, in Halliday, sunrise is at 6:56 am and sunset at 6:46 pm CDT.
Sunshine
The average sunshine in September in Halliday is 9.6h.UV index
In September, the average daily maximum UV index in Halliday is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Halliday, AR
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (43.7°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Halliday, 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
Halliday, AR
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is February (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Halliday, AR
- Average humidity in September: 73%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Halliday, AR
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (0.94").
The driest months (with the least rainfall) are September and December (0.47").
Average rainfall days in September
Halliday, AR
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is July (10.4 days).
The month with the least rainy days is January (4.4 days).
Average snowfall in September
Halliday, AR
- Average snowfall in September: 0"
The months with the highest snowfall are March and December (0.12").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Halliday, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Halliday, AR
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Halliday, AR
- Average sunshine days in September: 21 days
The month with the most sunshine days is December (24.6 days).
The months with the least sunshine days are May and August (17.6 days).
Average UV index in September
Halliday, 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
Halliday, AR
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 24).
Average visibility in September
Halliday, AR
- 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).
