September weather forecast and climate
Poplar Bluff, MO

September, the first month of the autumn, in Poplar Bluff, is also a moderately hot month, with average temperature varying between 81.7°F (27.6°C) and 62.2°F (16.8°C).

Temperature

In September, the average high-temperature is practically the same as in August - a warm 81.7°F (27.6°C). In Poplar Bluff, Missouri, the average low-temperature is 62.2°F (16.8°C).

Heat index

In September, the average heat index is calculated to a tropical 86.2°F (30.1°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, metabolic differences). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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 Poplar Bluff, Missouri, is 72%.

Rainfall

In Poplar Bluff, during 9.3 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Poplar Bluff, during the entire year, the rain falls for 124.5 days and collects up to 16.38" (416mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

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

Sunshine

The average sunshine is 9.9h.

UV index

The average daily maximum UV index in Poplar Bluff is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the average person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. 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 Poplar Bluff?

In Poplar Bluff, Missouri, in September, the average high-temperature is 81.7°F (27.6°C), and the average low-temperature is 62.2°F (16.8°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines relative humidity and air temperature, is estimated at 86.2°F (30.1°C).

What is the average humidity in September in Poplar Bluff?

The average relative humidity in September in Poplar Bluff, Missouri, is 72%.

How many days does it rain in September in Poplar Bluff?

In September, the rain falls for 9.3 days. Throughout September, 0.87" (22mm) of precipitation is accumulated.

When it does not snow in Poplar Bluff?

April through October are months without snowfall in Poplar Bluff, Missouri.

What is the average length of the day in September in Poplar Bluff?

In Poplar Bluff, Missouri, the average length of the day in September is 12.4h.

How long on average sun shines in September in Poplar Bluff?

The average sunshine in September in Poplar Bluff, Missouri, is 9.9h.

What is the UV index reading in September in Poplar Bluff?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to the UV radiation.
Average temperature in September - Poplar Bluff, MO
  • Average high temperature in September: 27.6°C

The warmest month (with the highest average high temperature) is July (31.3°C).
The month with the lowest average high temperature is January (6°C).

  • Average low temperature in September: 16.8°C

The month with the highest average low temperature is July (21.3°C).
The coldest month (with the lowest average low temperature) is January (-1.4°C).

Average pressure in September - Poplar Bluff, MO
  • Average pressure in September: 1016.4mbar

The month with the highest atmospheric pressure is January (1021.5mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in September - Poplar Bluff, MO
  • Average wind speed in September: 9.6km/h

The windiest month (with the highest average wind speed) is February (14.6km/h).
The calmest month (with the lowest average wind speed) is August (9km/h).

Average humidity in September - Poplar Bluff, MO
  • Average humidity in September: 72%

Months with the highest relative humidity are March and May (78%).
The month with the lowest relative humidity is October (69%).

Average rainfall in September - Poplar Bluff, MO
  • Average rainfall in September: 22mm

The wettest month (with the highest rainfall) is May (55mm).
The driest month (with the least rainfall) is December (19mm).

Average rainfall days in September - Poplar Bluff, MO
  • Average rainfall days in September: 9.3 days

Months with the highest number of rainy days are May and July (14.3 days).
The month with the least rainy days is January (6 days).

Average snowfall in September - Poplar Bluff, MO
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (10mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in September - Poplar Bluff, MO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.1 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Poplar Bluff, MO
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 9.9h

The month with the most sunshine is June (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in September - Poplar Bluff, MO
  • Average sunshine days in September: 17.8 days

The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is July (13.8 days).

Average UV index in September - Poplar Bluff, MO
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September - Poplar Bluff, MO
  • Average cloud cover in September: 26

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 - Poplar Bluff, MO
  • Average visibility in September: 9km

The month with the highest visibility is June (10km).
Months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).