September weather forecastPortis, KS
September
Weather in September
September, the first month of the autumn in Portis, is still a warm month, with an average temperature fluctuating between 81.3°F (27.4°C) and 60.6°F (15.9°C).Temperature
September marks a gentle change in average high-temperature, declining from August's tropical 89.8°F (32.1°C) to a warm 81.3°F (27.4°C). Throughout the month of September, the average temperature in Portis dips to a refreshing 60.6°F (15.9°C) at night.Heat index
September's heat index is evaluated at 84.2°F (29°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Always consider that heat index estimations are for light winds and places in the shade. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. 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.
Humidity
In September, the average relative humidity is 61%.Rainfall
In Portis, during September, the rain falls for 10.4 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Portis, during the entire year, the rain falls for 110.3 days and collects up to 19.76" (502mm) of precipitation.Snowfall
In Portis, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 7:03 am and sunset at 8:05 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:18 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Portis, KS
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (70.5°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in September
Portis, KS
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Portis, KS
- Average wind speed in September: 10.1mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is August (8.9mph).
Average humidity in September
Portis, KS
- Average humidity in September: 61%
The months with the highest relative humidity are January and December (69%).
The month with the lowest relative humidity is July (57%).
Average rainfall in September
Portis, KS
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Portis, KS
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in September
Portis, KS
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Portis, KS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Portis, KS
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in September
Portis, KS
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in September
Portis, KS
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Portis, KS
- Average cloud cover in September: 24
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is June (Cloud cover 21).
Average visibility in September
Portis, 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).
