September weather forecastAmes, AR
September
Weather in September
The first month of the autumn, September, is still a tropical month in Ames, Arkansas, with temperature in the range of an average low of 66°F (18.9°C) and an average high of 87.6°F (30.9°C).Temperature
The onset of September brings a small shift in high-temperatures, falling from a tropical 93.4°F (34.1°C) in August to a still hot 87.6°F (30.9°C). September nights showcase a dramatic shift from daytime highs to an average temperature of 66°F (18.9°C).Heat index
September's average heat index is appraised at a very hot 100.4°F (38°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.Heat index specifics point out values are for conditions of shade and a slight breeze. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In September, the average relative humidity is 71%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.3 days and typically collects 2.09" (53mm) of precipitation.Snowfall
In Ames, snow does not fall in April through October and December.Daylight
In Ames, Arkansas, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:58 pm CDT.
Sunshine
In Ames, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Act with care - The suggestion to avoid sunburn is emphasized. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce 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
Ames, AR
- Average high temperature in September: 87.6°F
The warmest months (with the highest average high temperature) are July and August (93.4°F).
The month with the lowest average high temperature is January (51.8°F).
- Average low temperature in September: 66°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (36.5°F).
Average pressure in September
Ames, AR
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Ames, AR
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Ames, AR
- Average humidity in September: 71%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Ames, AR
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is April (5.08").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in September
Ames, AR
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is October (10.3 days).
Average snowfall in September
Ames, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days in September
Ames, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.5 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
Ames, AR
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Ames, AR
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is February (13 days).
Average UV index in September
Ames, 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
Ames, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are August and September (Cloud cover 28).
Average visibility in September
Ames, AR
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
