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 a hot 91.4°F (33°C) in August to a moderately hot 83.1°F (28.4°C). The nighttime temperature, during September, averages of 64.8°F (18.2°C).Heat index
The average heat index in September is calculated to be a tropical 86°F (30°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Understand that the heat index values take into account shaded locations and mild winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
In Freeport, the average relative humidity in September is 63%.Rainfall
In Freeport, in September, during 13.5 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Freeport, during the entire year, the rain falls for 122.5 days and collects up to 24.69" (627mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 25min.On the first day of the month, sunrise is at 7:02 am and sunset at 7:59 pm. On the last day of September, in Freeport, sunrise is at 7:26 am and sunset at 7:15 pm CDT.
Sunshine
In Freeport, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Freeport have in September?
What is the UV index intensity in September?
Average temperature in September
Freeport, KS
- Average high temperature in September: 83.1°F
The warmest month (with the highest average high temperature) is July (94.1°F).
The month with the lowest average high temperature is January (45°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is July (73.9°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Freeport, KS
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Freeport, KS
- Average wind speed in September: 9.5mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in September
Freeport, KS
- Average humidity in September: 63%
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is July (57%).
Average rainfall in September
Freeport, KS
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in September
Freeport, KS
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in September
Freeport, KS
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Freeport, KS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.5 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
Freeport, KS
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 6h and 12min).
Average sunshine days in September
Freeport, KS
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is January (24.6 days).
The month with the least sunshine days is August (13.1 days).
Average UV index in September
Freeport, KS
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in September
Freeport, KS
- Average cloud cover in September: 25
The month with the most cloud cover is March (Cloud cover 36).
The months with the least cloud cover are June and August (Cloud cover 20).
Average visibility in September
Freeport, KS
- 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).
Freeport, Kansas, USA
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