August weather forecast
Grayson, OK

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Weather in August

The last month of the summer, August, is another tropical month in Grayson, Oklahoma, with an average temperature fluctuating between 91.6°F (33.1°C) and 71.1°F (21.7°C).

Temperature

Grayson's August weather reaches an average high of 91.6°F (33.1°C) and an average low of 71.1°F (21.7°C), making it the warmest month.

Heat index

The average heat index in August is calculated to be a blistering 107.6°F (42°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

August is the least humid month, with an average relative humidity of 66%.

Rainfall

In Grayson, in August, it is raining for 12.6 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, there are 136.7 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

In Grayson, the average length of the day in August is 13h and 28min.
On the first day of August, sunrise is at 6:32 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 7:51 pm CDT.

Sunshine

With an average of 11h of sunshine, August has the most sunshine of the year.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index, 7 in August, converts into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.

Frequently asked questions

What is the hottest time of year?

In Grayson, August is known for its average highest temperatures, reaching a high of 91.6°F (33.1°C) and a low of 71.1°F (21.7°C).

How hot is it in August?

During August, Grayson experiences an average high-temperature of 91.6°F (33.1°C) and a low-temperature of 71.1°F (21.7°C). In August, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is calculated to be 107.6°F (42°C).

What is the least humid month?

The least humid month is August, with an average relative humidity of 66%.

What is the average humidity in August?

In August, the average relative humidity is 66%.

How many days does it rain in August?

In Grayson, in August, it is raining for 12.6 days, with typically 2.83" (72mm) of accumulated precipitation.

When it does not snow?

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

What is the average length of the day in August?

In Grayson, Oklahoma, the average day length in August is 13h and 28min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 6:32 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 7:51 pm CDT.

What month has the most sunshine?

With an average of 11h of sunshine, August has the most sunshine of the year.

How long on average sun shines in August?

In August, the average sunshine duration is 11h.

When is the highest UV index?

The months with the highest UV index in Grayson are June through August, with an average maximum UV index of 7.

How high is the UV index in August?

In Grayson, the average daily maximum UV index in August is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health 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 August
Grayson, OK

Average temperature in August - Grayson, OK
  • Average high temperature in August: 91.6°F

The warmest month (with the highest average high temperature) is August (91.6°F).
The month with the lowest average high temperature is January (47.7°F).

  • Average low temperature in August: 71.1°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 (31.6°F).

Average pressure in August
Grayson, OK

Average pressure in August - Grayson, OK
  • Average pressure in August: 29.94"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).

Average wind speed in August
Grayson, OK

Average wind speed in August - Grayson, OK
  • Average wind speed in August: 7mph

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).

Average humidity in August
Grayson, OK

Average humidity in August - Grayson, OK
  • Average humidity in August: 66%

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

Average rainfall in August
Grayson, OK

Average rainfall in August - Grayson, OK
  • Average rainfall in August: 2.83"

The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is February (1.46").

Average rainfall days in August
Grayson, OK

Average rainfall days in August - Grayson, OK
  • Average rainfall days in August: 12.6 days

The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (6.4 days).

Average snowfall in August
Grayson, OK

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

The month with the highest snowfall is February (1.73").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in August
Grayson, OK

Average snowfall days in August - Grayson, OK
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Grayson, OK

Average daylight in August / Average sunshine in August - Grayson, OK
  • Average daylight in August: 13h and 3min

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 August: 11h and 0min

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).

Average sunshine days in August
Grayson, OK

Average sunshine days in August - Grayson, OK
  • Average sunshine days in August: 16.7 days

The month with the most sunshine days is January (21.9 days).
The month with the least sunshine days is May (13.1 days).

Average UV index in August
Grayson, OK

Average UV index in August - Grayson, OK
  • Average UV index in August: 7

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).

Average cloud cover in August
Grayson, OK

Average cloud cover in August - Grayson, OK
  • Average cloud cover in August: 20

The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 20).

Average visibility in August
Grayson, OK

Average visibility in August - Grayson, OK
  • Average visibility in August: 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).

Grayson, Oklahoma, USA

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