September weather forecastLynn, AR

September

Weather in September

September, the first month of the autumn in Lynn, is still a warm month, with temperature in the range of an average low of 63.7°F (17.6°C) and an average high of 82°F (27.8°C).

Temperature

September signals a slight drop in average high-temperature, sliding from August's tropical 87.8°F (31°C) to a warm 82°F (27.8°C). Lynn experiences a mean temperature of 63.7°F (17.6°C) during September nights.

Heat index

For most parts of September, the heat index is calculated to be a tropical 87.8°F (31°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.
In reference to the heat index, it's for places in shade and with a slight wind. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.

Humidity

The average relative humidity in September in Lynn is 72%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11 days and typically collects 2.2" (56mm) of precipitation.

Snowfall

April through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:49 pm CDT.

Sunshine

In Lynn, the average sunshine in September is 9.6h.

UV index

In Lynn, Arkansas, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Undertake protective steps - Preventing sun damage is advised. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.

Updated: Feb 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature, in September, in Lynn, is 82°F (27.8°C), while the average low-temperature is 63.7°F (17.6°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is calculated to be 87.8°F (31°C).

In Lynn, Arkansas, the average relative humidity in September is 72%.

The month with the least rainfall in Lynn is September, when the rain falls for 11 days and typically collects 2.2" (56mm) of precipitation.

In Lynn, Arkansas, in September, it is raining for 11 days, with typically 2.2" (56mm) of accumulated precipitation.

In Lynn, Arkansas, snow does not fall in April through September.

In Lynn, Arkansas, in September, it doesn't snow. In October, it regularly snows.

The average day length in September is 12h and 23min.

In September, on the first day of the month, sunrise is at 6:37 am and sunset at 7:32 pm. On the last day of the month, in Lynn, Arkansas, sunrise is at 6:59 am and sunset at 6:49 pm CDT.

In September, the average sunshine duration in Lynn is 9.6h.

In Lynn, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

87.8°F

82°F

71.2°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.3mph

6.6mph

8.4mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

13.3

Average snowfall

0.04"

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

15.4

16.7

19.8

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Lynn, AR

Average high temperature in September: 82°F

The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (45.1°F).

Average low temperature in September: 63.7°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

Average pressure in September
Lynn, AR

Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Lynn, AR

Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is February (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

Average humidity in September
Lynn, AR

Average humidity in September: 72%

The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (67%).

Average rainfall in September
Lynn, AR

Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is April (4.61").
The driest month (with the least rainfall) is September (2.2").

Average rainfall days in September
Lynn, AR

Average rainfall days in September: 11 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (8.7 days).

Average snowfall in September
Lynn, AR

Average snowfall in September: 0"

The month with the highest snowfall is February (1.18").
The months with the least snowfall are April, May, June, July, August and September (0").

Average snowfall days in September
Lynn, AR

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.7 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
Lynn, AR

Average daylight in September: 12h and 24min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

Average sunshine in September: 9h and 36min

The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in September
Lynn, AR

Average sunshine days in September: 16.7 days

The month with the most sunshine days is October (19.8 days).
The months with the least sunshine days are April and May (13.8 days).

Average UV index in September
Lynn, AR

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 and December (UV index 2).

Average cloud cover in September
Lynn, AR

Average cloud cover in September: 28

The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 25).

Average visibility in September
Lynn, AR

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).