September weather forecast and climate
Fountain Lake, AR

The first month of the autumn, September, is also a moderately hot month in Fountain Lake, Arkansas, with average temperature varying between 63.3°F (17.4°C) and 84.9°F (29.4°C).

Temperature

In Fountain Lake, the average high-temperature in September slightly decreases, from a hot 91.2°F (32.9°C) in August, to a moderately hot 84.9°F (29.4°C). In September, the average low-temperature is 63.3°F (17.4°C).

Heat index

The average heat index in September is calculated to a hot 93.7°F (34.3°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, clothing, differences in body mass, height, and shape). 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 particularly important for children. 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

In Fountain Lake, the average relative humidity in September is 73%.

Rainfall

September is the month with the least rainfall. Rain falls for 13.2 days and accumulates 2.17" (55mm) of precipitation.

Snowfall

April through October are months without snowfall in Fountain Lake.

Daylight

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

Sunshine

The average sunshine is 9.4h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 in September 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Fountain Lake?

The average high-temperature, in September, in Fountain Lake, Arkansas, is 84.9°F (29.4°C), while the average low-temperature is 63.3°F (17.4°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that takes the relative humidity and factores it into the air temperature reading, in September is appraised at 93.7°F (34.3°C).

What is the average humidity in September in Fountain Lake?

In Fountain Lake, the average relative humidity in September is 73%.

How many days does it rain in September in Fountain Lake?

In Fountain Lake, in September, during 13.2 rainfall days, 2.17" (55mm) of precipitation is typically accumulated.

What is the driest month in Fountain Lake?

September is the month with the least rainfall in Fountain Lake. Rain falls for 13.2 days and accumulates 2.17" (55mm) of precipitation.

When it does not snow in Fountain Lake?

April through October are months without snowfall in Fountain Lake.

What is the average length of the day in September in Fountain Lake?

In September, the average length of the day in Fountain Lake, Arkansas, is 12.4h.

How long on average sun shines in September in Fountain Lake?

In Fountain Lake, the average sunshine in September is 9.4h.

What is the UV index intensity in September in Fountain Lake?

In September, the average daily maximum UV index in Fountain Lake, Arkansas, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Fountain Lake, AR
  • Average high temperature in September: 29.4°C

The warmest month (with the highest average high temperature) is July (33.3°C).
The month with the lowest average high temperature is January (9.3°C).

  • Average low temperature in September: 17.4°C

The month with the highest average low temperature is July (21.4°C).
The coldest month (with the lowest average low temperature) is January (0.6°C).

Average pressure in September - Fountain Lake, AR
  • Average pressure in September: 1016.1mbar

The month with the highest atmospheric pressure is January (1021.7mbar).
The month with the lowest atmospheric pressure is June (1013.9mbar).

Average wind speed in September - Fountain Lake, AR
  • Average wind speed in September: 7.6km/h

The windiest month (with the highest average wind speed) is April (11.9km/h).
The calmest month (with the lowest average wind speed) is August (7.3km/h).

Average humidity in September - Fountain Lake, AR
  • Average humidity in September: 73%

The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September - Fountain Lake, AR
  • Average rainfall in September: 55mm

The wettest month (with the highest rainfall) is April (115mm).
The driest month (with the least rainfall) is September (55mm).

Average rainfall days in September - Fountain Lake, AR
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is November (10.2 days).

Average snowfall in September - Fountain Lake, AR
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (32mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in September - Fountain Lake, AR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.5 days).
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 - Fountain Lake, AR
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 9.4h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 5.1h).

Average sunshine days in September - Fountain Lake, AR
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (11.8 days).

Average UV index in September - Fountain Lake, AR
  • Average UV index in September: 5

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 - Fountain Lake, AR
  • Average cloud cover in September: 29

Months with the most cloud cover are February and March (Cloud cover 47).
Months with the least cloud cover are June, July, August and September (Cloud cover 29).

Average visibility in September - Fountain Lake, AR
  • Average visibility in September: 9km

Months with the highest visibility are April, June, July, August, September, October and November (9km).
Months with the lowest visibility are January, February, March, May and December (8km).