Duncan
Oklahoma, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Duncan, OK

August, the last month of the summer, in Duncan, is another very hot month, with average temperature fluctuating between 71.1°F (21.7°C) and 96.1°F (35.6°C).

Temperature

The warmest month is August, with an average high-temperature of 96.1°F (35.6°C) and an average low-temperature of 71.1°F (21.7°C).

Heat index

In August, the average heat index is estimated at a blazing hot 114.6°F (45.9°C). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
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 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, wind), and 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 especially crucial for babies and toddlers. 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

Months with the lowest humidity are August and September, with an average relative humidity of 58%.

Rainfall

In Duncan, it is raining for 4.8 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, there are 60.1 rainfall days, and 33.1" (840.9mm) of precipitation is accumulated.

Snowfall

In Duncan, Oklahoma, during the entire year, snow aggregates up to 7" (177.8mm).

Daylight

The average length of the day in August in Duncan is 13.4h.

What is the warmest month in Duncan?

The warmest month in Duncan, Oklahoma, is August, with an average high-temperature of 96.1°F (35.6°C) and an average low-temperature of 71.1°F (21.7°C).

What is the temperature in August in Duncan?

In August, in Duncan, the average high-temperature is 96.1°F (35.6°C), and the average low-temperature is 71.1°F (21.7°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines both air temperature and relative humidity, in August is appraised at 114.6°F (45.9°C).

What are the least humid months in Duncan?

August and September, with an average relative humidity of 58%, are the least humid months.

What is the average humidity in August in Duncan?

The average relative humidity in August in Duncan, Oklahoma, is 58%.

How many days does it rain in August in Duncan?

In August, the rain falls for 4.8 days. Throughout August, 2.4" (61mm) of precipitation is accumulated.

How many hours of daylight does Duncan have in August?

In Duncan, Oklahoma, the average length of the day in August is 13.4h.
Average temperature in August - Duncan, OK
  • Average high temperature in August: 96°F

The warmest month (with the highest average high temperature) is August (96°F).
The month with the lowest average high temperature is January (52°F).

  • Average low temperature in August: 71°F

Months with the highest average low temperature are July and August (71°F).
The coldest month (with the lowest average low temperature) is January (29°F).

Average humidity in August - Duncan, OK
  • Average humidity in August: 58%

The month with the highest relative humidity is January (70%).
Months with the lowest relative humidity are August and September (58%).

Average rainfall in August - Duncan, OK
  • Average rainfall in August: 2.4"

The wettest month (with the highest rainfall) is May (6.4").
The driest month (with the lowest rainfall) is January (1.4").

Average rainfall days in August - Duncan, OK
  • Average rainfall days in August: 4.8 days

The month with the highest number of rainy days is May (7.6 days).
The month with the lowest number of rainy days is November (2.9 days).

Average snowfall in August - Duncan, OK
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.2").
Months with the lowest snowfall are May, June, July, August, September, October and November (0").

Average daylight in August - Duncan, OK
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).