August weather forecast
Stillwater, OK

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Weather in August

Despite seeing a slight dip in temperature from July, August remains significantly hot in Stillwater. The city continues to experience long, hot days and moderately high humidity levels. Even though Autumn is on the horizon, August's weather is comparably as warm as July's. The average maximum temperature sits at a hot 92.3°F (33.5°C), giving August the second-highest average temperatures of the year.

Temperature

August's advent presents an average high-temperature of a still hot 92.3°F (33.5°C), indicating a slight variation from the conditions of the previous month. An average minimum temperature of 70.9°F (21.6°C) marks the month of August.

Heat index

For most parts of August, the heat index is appraised at a blisteringly hot 107.6°F (42°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', joins air temperature with relative humidity to produce a temperature perception for humans. 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. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The least humid month is August, with an average relative humidity of 62%.

Rainfall

In August, the rain falls for 12.4 days. Throughout August, 2.48" (63mm) of precipitation is accumulated. In Stillwater, during the entire year, the rain falls for 121.4 days and collects up to 25.28" (642mm) of precipitation.

Snowfall

In Stillwater, Oklahoma, snow does not fall in April through October.

Daylight

The average length of the day in August is 13h and 29min.
On the first day of the month, sunrise is at 6:36 am and sunset at 8:33 pm. On the last day of August, in Stillwater, sunrise is at 6:59 am and sunset at 7:56 pm CDT.

Sunshine

With an average of 11.2h of sunshine, August has the most sunshine of the year.

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A typical high UV index of 7 in August suggests the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.

Frequently asked questions

How hot does it get in August?

Stillwater in August has an average high-temperature of 92.3°F (33.5°C) and an average low-temperature of 70.9°F (21.6°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in August is appraised at 107.6°F (42°C).

What is the least humid month in Stillwater?

August is the least humid month, with an average relative humidity of 62%.

What is the average humidity in August?

In August, the average relative humidity is 62%.

How many days does it rain in August?

In Stillwater, in August, it is raining for 12.4 days, with typically 2.48" (63mm) of accumulated precipitation.

When it does not snow?

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

How many hours of daylight does Stillwater have in August?

The average day length in August is 13h and 29min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 6:36 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 7:56 pm CDT.

What month has the most sunshine?

With an average of 11.2h of sunshine, August has the most sunshine of the year.

How many hours of sunshine does Stillwater have in August?

In Stillwater, the average sunshine duration in August is 11.2h.

When is the highest UV index?

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

What is the UV index reading in August?

The average daily maximum UV index in August is 7. A UV Index 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
Stillwater, OK

Average temperature in August - Stillwater, OK
  • Average high temperature in August: 92.3°F

The warmest month (with the highest average high temperature) is July (93°F).
The month with the lowest average high temperature is January (47.5°F).

  • Average low temperature in August: 70.9°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

Average pressure in August
Stillwater, OK

Average pressure in August - Stillwater, OK
  • Average pressure in August: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed in August
Stillwater, OK

Average wind speed in August - Stillwater, OK
  • Average wind speed in August: 8.2mph

The windiest month (with the highest average wind speed) is April (11.5mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).

Average humidity in August
Stillwater, OK

Average humidity in August - Stillwater, OK
  • Average humidity in August: 62%

The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is August (62%).

Average rainfall in August
Stillwater, OK

Average rainfall in August - Stillwater, OK
  • Average rainfall in August: 2.48"

The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is December (0.98").

Average rainfall days in August
Stillwater, OK

Average rainfall days in August - Stillwater, OK
  • Average rainfall days in August: 12.4 days

The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (4.8 days).

Average snowfall in August
Stillwater, OK

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

The month with the highest snowfall is February (1.42").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in August
Stillwater, OK

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

The month with the highest number of snowfall days is February (2.8 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
Stillwater, OK

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

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in August: 11h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).

Average sunshine days in August
Stillwater, OK

Average sunshine days in August - Stillwater, OK
  • Average sunshine days in August: 15.7 days

The month with the most sunshine days is January (22.9 days).
The month with the least sunshine days is May (13.7 days).

Average UV index in August
Stillwater, OK

Average UV index in August - Stillwater, 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
Stillwater, OK

Average cloud cover in August - Stillwater, OK
  • Average cloud cover in August: 19

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 19).

Average visibility in August
Stillwater, OK

Average visibility in August - Stillwater, 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).

Stillwater, Oklahoma, USA

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