September weather forecast and climate
Portis, KS

The first month of the autumn, September, is still a warm month in Portis, Kansas, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 60.6°F (15.9°C).

Temperature

In September, the average high-temperature marginally drops, from a tropical 89.8°F (32.1°C) in August, to a warm 81.3°F (27.4°C). The average low-temperature, in September, is 60.6°F (15.9°C).

Heat index

In September, the average heat index is evaluated at 83.7°F (28.7°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, clothing, pregnancy). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in Portis, Kansas, is 61%.

Rainfall

In Portis, it is raining for 10.4 days, with typically 1.42" (36mm) of accumulated 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

The average length of the day in Portis, Kansas, is 12.4h.

Sunshine

The average sunshine in Portis is 8.7h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Portis?

In September, in Portis, the average high-temperature is 81.3°F (27.4°C), and the average low-temperature is 60.6°F (15.9°C). The average heat index (a.k.a. 'feels like', 'real feel'), that factores the actual air temperature with the relative humidity, in September is estimated at 83.7°F (28.7°C).

What is the average humidity in September in Portis?

In Portis, Kansas, the average relative humidity in September is 61%.

How much does it rain in Portis in September?

In Portis, Kansas, in September, it is raining for 10.4 days, with typically 1.42" (36mm) of accumulated precipitation.

Does it snow in Portis in September?

In Portis, Kansas, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Portis?

June through September are months without snowfall.

How many hours of daylight does Portis have in September?

In Portis, the average length of the day in September is 12.4h.

How many hours of sunshine does Portis have in September?

In September, the average sunshine in Portis is 8.7h.

What is the UV index intensity in September in Portis?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.
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"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.85").

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%

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").
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).
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: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is June (Average sunshine: 11.2h).
The month with the least sunshine is December (Average sunshine: 6h).

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

Months with the highest UV index are June and July (UV index 7).
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

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).