September weather forecast
Nelson, OK

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Weather in September

September, the first month of the autumn in Nelson, is still a tropical month, with an average temperature varying between 86.4°F (30.2°C) and 65.5°F (18.6°C).

Temperature

September signifies a gentle decline in Nelson's average high-temperature, easing from a hot 92.8°F (33.8°C) in August to a still tropical 86.4°F (30.2°C). Nelson observes an average low-temperature of 65.5°F (18.6°C) during September nights.

Heat index

The heat index for September is evaluated at a sweltering 95°F (35°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In September, the average relative humidity in Nelson is 69%.

Rainfall

In September, in Nelson, Oklahoma, the rain falls for 12.8 days. Throughout September, 2.91" (74mm) of precipitation is accumulated. In Nelson, Oklahoma, during the entire year, the rain falls for 149.7 days and collects up to 37.6" (955mm) of precipitation.

Snowfall

In Nelson, snow does not fall in April through October.

Daylight

In Nelson, the average length of the day in September is 12h and 22min.
On the first day of September, sunrise is at 6:56 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:07 pm CDT.

Sunshine

The average sunshine in September in Nelson is 8.9h.

UV index

In September, the average daily maximum UV index in Nelson is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, an average UV index of 6 transforms into the following instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
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Frequently asked questions

How hot is it in Nelson in September?

In September, the average high-temperature and low-temperature in Nelson, Oklahoma, are 86.4°F (30.2°C) and 65.5°F (18.6°C) respectively. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is evaluated at 95°F (35°C).

What is the average humidity in September in Nelson?

The average relative humidity in September is 69%.

How many days does it rain in September in Nelson?

In Nelson, Oklahoma, during September, the rain falls for 12.8 days and regularly aggregates up to 2.91" (74mm) of precipitation.

When it does not snow in Nelson?

In Nelson, snow does not fall in April through October.

What is the average length of the day in September in Nelson?

The average day length in September is 12h and 22min.

When is the sunrise / sunset in September in Nelson?

In September, on the first day of the month, sunrise is at 6:56 am and sunset at 7:48 pm. On the last day of the month, in Nelson, Oklahoma, sunrise is at 7:17 am and sunset at 7:07 pm CDT.

How many hours of sunshine does Nelson have in September?

In September, the average sunshine duration in Nelson, Oklahoma, is 8.9h.

What is the UV index reading in September in Nelson?

The average daily maximum UV index in September in Nelson, Oklahoma, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to 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
Nelson, OK

Average temperature in September - Nelson, OK
  • Average high temperature in September: 86.4°F

The warmest month (with the highest average high temperature) is August (92.8°F).
The month with the lowest average high temperature is January (50.5°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (34.7°F).

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Average pressure in September
Nelson, OK

Average pressure in September - Nelson, OK
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in September
Nelson, OK

Average wind speed in September - Nelson, OK
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in September
Nelson, OK

Average humidity in September - Nelson, OK
  • Average humidity in September: 69%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is August (66%).

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Average rainfall in September
Nelson, OK

Average rainfall in September - Nelson, OK
  • Average rainfall in September: 2.91"

The wettest month (with the highest rainfall) is May (5.12").
The driest month (with the least rainfall) is January (1.97").

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Average rainfall days in September
Nelson, OK

Average rainfall days in September - Nelson, OK
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is January (8.5 days).

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Average snowfall in September
Nelson, OK

Average snowfall in September - Nelson, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.98").
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
Nelson, OK

Average snowfall days in September - Nelson, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.8 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
Nelson, OK

Average daylight in September / Average sunshine in September - Nelson, OK
  • 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: 8h and 5min

The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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Average sunshine days in September
Nelson, OK

Average sunshine days in September - Nelson, OK
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is May (12.9 days).

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Average UV index in September
Nelson, OK

Average UV index in September - Nelson, OK
  • Average UV index in September: 6

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Nelson, OK

Average cloud cover in September - Nelson, OK
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in September
Nelson, OK

Average visibility in September - Nelson, OK
  • 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).

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Nelson, Oklahoma, USA

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