September weather forecast
Dewar, OK

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Weather in September

The first month of the autumn, September, is still a warm month in Dewar, Oklahoma, with an average temperature ranging between max 84.6°F (29.2°C) and min 64.6°F (18.1°C).

Temperature

The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a tropical 91.9°F (33.3°C) in August to a warm 84.6°F (29.2°C). During the month of September, an average temperature of 64.6°F (18.1°C) is noted during the nights in Dewar.

Heat index

The heat index in September is calculated to be a tropical 91.4°F (33°C). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. 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 highly critical to babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

In September, the average relative humidity is 69%.

Rainfall

In September, in Dewar, the rain falls for 12.3 days. Throughout September, 2.6" (66mm) of precipitation is accumulated. In Dewar, during the entire year, the rain falls for 132.2 days and collects up to 29.49" (749mm) of precipitation.

Snowfall

In Dewar, snow does not fall in May through October.

Daylight

In September, the average length of the day in Dewar is 12h and 23min.
On the first day of September in Dewar, sunrise is at 6:56 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:08 pm CDT.

Sunshine

In Dewar, the average sunshine in September is 8.7h.

UV index

The average daily maximum UV index in September in Dewar is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 5 translates into these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
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Frequently asked questions

How hot is September in Dewar?

September temperatures vary between a high-temperature of 84.6°F (29.2°C) and a low-temperature of 64.6°F (18.1°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in September is calculated to be 91.4°F (33°C).

What is the average humidity in September in Dewar?

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

How much does it rain in Dewar in September?

In Dewar, in September, during 12.3 rainfall days, 2.6" (66mm) of precipitation is typically accumulated.

When it does not snow in Dewar?

In Dewar, Oklahoma, snow does not fall in May through October.

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

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

What time are sunrise and sunset in September in Dewar?

On the first day of September in Dewar, Oklahoma, sunrise is at 6:56 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:08 pm CDT.

How many hours of sunshine does Dewar have in September?

In September, the average sunshine duration in Dewar, Oklahoma, is 8.7h.

How high is the UV index in September in Dewar?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
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
Dewar, OK

Average temperature in September - Dewar, OK
  • Average high temperature in September: 84.6°F

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (48°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).

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Average pressure in September
Dewar, OK

Average pressure in September - Dewar, 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 (29.9"Hg).

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Average wind speed in September
Dewar, OK

Average wind speed in September - Dewar, OK
  • Average wind speed in September: 7.1mph

The windiest month (with the highest average wind speed) is March (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in September
Dewar, OK

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

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is August (66%).

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Average rainfall in September
Dewar, OK

Average rainfall in September - Dewar, OK
  • Average rainfall in September: 2.6"

The wettest month (with the highest rainfall) is May (4.84").
The driest month (with the least rainfall) is February (1.42").

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Average rainfall days in September
Dewar, OK

Average rainfall days in September - Dewar, OK
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (14.7 days).
The month with the least rainy days is January (6.9 days).

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Average snowfall in September
Dewar, OK

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

The month with the highest snowfall is February (1.14").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Dewar, OK

Average snowfall days in September - Dewar, OK
  • 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 May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Dewar, OK

Average daylight in September / Average sunshine in September - Dewar, OK
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 8h and 4min

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 36min).

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Average sunshine days in September
Dewar, OK

Average sunshine days in September - Dewar, OK
  • Average sunshine days in September: 16 days

The month with the most sunshine days is January (21.8 days).
The months with the least sunshine days are April and May (14.4 days).

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Average UV index in September
Dewar, OK

Average UV index in September - Dewar, OK
  • Average UV index in September: 5

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
Dewar, OK

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

The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).

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Average visibility in September
Dewar, OK

Average visibility in September - Dewar, 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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Dewar, Oklahoma, USA

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