September weather forecast
Joplin, AR

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Weather in September

The first month of the autumn, September, is still a warm month in Joplin, Arkansas, with temperature in the range of an average low of 63°F (17.2°C) and an average high of 83.7°F (28.7°C).

Temperature

In the transition to September, Joplin observes a minor drop in the average high-temperature, shifting from a hot 90.1°F (32.3°C) in August to a moderately hot 83.7°F (28.7°C). Joplin observes an average nighttime temperature of 63°F (17.2°C) during September.

Heat index

The heat index value for September is estimated at a tropical 91.4°F (33°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.
Data suggests that the heat index is set for environments in shade and with a light wind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.

Humidity

July through October, with an average relative humidity of 73%, are the least humid months.

Rainfall

In Joplin, during September, the rain falls for 13.2 days and regularly aggregates up to 2.72" (69mm) of precipitation. Throughout the year, in Joplin, Arkansas, there are 160.2 rainfall days, and 38.86" (987mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Joplin.

Daylight

In Joplin, the average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:47 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:58 pm CDT.

Sunshine

In September, the average sunshine in Joplin is 9.2h.

UV index

The average daily maximum UV index in September in Joplin, Arkansas, is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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Frequently asked questions

How hot is it in Joplin in September?

In September, the average high-temperature and low-temperature are 83.7°F (28.7°C) and 63°F (17.2°C) respectively. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is estimated at 91.4°F (33°C).

What are the least humid months in Joplin?

The months with the lowest humidity are July through October, with an average relative humidity of 73%.

What is the average humidity in September in Joplin?

In Joplin, Arkansas, the average relative humidity in September is 73%.

How many days does it rain in September in Joplin?

In Joplin, in September, during 13.2 rainfall days, 2.72" (69mm) of precipitation is typically accumulated.

When it does not snow in Joplin?

In Joplin, Arkansas, snow does not fall in April through October.

How many hours of daylight does Joplin have in September?

In September, the average day length in Joplin is 12h and 23min.

What time are sunrise and sunset in September in Joplin?

On the first day of September in Joplin, sunrise is at 6:47 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:58 pm CDT.

How long on average sun shines in September in Joplin?

In September, the average sunshine duration in Joplin, Arkansas, is 9.2h.

What is the UV index reading in September in Joplin?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Joplin, AR

Average temperature in September - Joplin, AR
  • Average high temperature in September: 83.7°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (48.7°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).

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Average pressure in September
Joplin, AR

Average pressure in September - Joplin, AR
  • Average pressure in September: 30"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Joplin, AR

Average wind speed in September - Joplin, AR
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in September
Joplin, AR

Average humidity in September - Joplin, AR
  • Average humidity in September: 73%

The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are July, August, September and October (73%).

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Average rainfall in September
Joplin, AR

Average rainfall in September - Joplin, AR
  • Average rainfall in September: 2.72"

The wettest month (with the highest rainfall) is May (4.76").
The driest month (with the least rainfall) is January (2.32").

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Average rainfall days in September
Joplin, AR

Average rainfall days in September - Joplin, AR
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is January (9.6 days).

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Average snowfall in September
Joplin, AR

Average snowfall in September - Joplin, AR
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Joplin, AR

Average snowfall days in September - Joplin, AR
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Joplin, AR

Average daylight in September / Average sunshine in September - Joplin, AR
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).

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Average sunshine days in September
Joplin, AR

Average sunshine days in September - Joplin, AR
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is January (19 days).
The month with the least sunshine days is August (10.5 days).

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Average UV index in September
Joplin, AR

Average UV index in September - Joplin, AR
  • Average UV index in September: 5

The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Joplin, AR

Average cloud cover in September - Joplin, AR
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).

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Average visibility in September
Joplin, AR

Average visibility in September - Joplin, AR
  • Average visibility in September: 6mi

The months with the highest visibility are April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, May and December (5mi).

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Joplin, Arkansas, USA

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