August weather forecast
Roy, MS

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Weather in August

August, the last month of the summer in Roy, is another hot month, with an average temperature fluctuating between 71.8°F (22.1°C) and 91.4°F (33°C).

Temperature

The commencement of August brings an average high-temperature of a still hot 91.4°F (33°C), marking an inconsequential divergence from July. In August, Roy experiences a temperature dip to an average of 71.8°F (22.1°C) at night.

Heat index

The average heat index in August is appraised at a blazing hot 113°F (45°C). Keep guard: Heat cramps and heat exhaustion are likely. Continued activity increases the risk of heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In Roy, the average relative humidity in August is 74%.

Rainfall

In Roy, during August, the rain falls for 19.9 days and regularly aggregates up to 3.58" (91mm) of precipitation. Throughout the year, there are 165.6 rainfall days, and 36.06" (916mm) of precipitation is accumulated.

Snowfall

In Roy, snow does not fall in April through November.

Daylight

The average length of the day in August is 13h and 17min.
On the first day of August, sunrise is at 6:10 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 7:19 pm CDT.

Sunshine

The average sunshine in August in Roy is 10.2h.

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 7 in August transforms into the following instructions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in August?

During August, Roy experiences an average high-temperature of 91.4°F (33°C) and a low-temperature of 71.8°F (22.1°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is appraised at 113°F (45°C).

What is the average humidity in August?

The average relative humidity in August is 74%.

How much does it rain in August?

In Roy, in August, it is raining for 19.9 days, with typically 3.58" (91mm) of accumulated precipitation.

When it does not snow?

April through November are months without snowfall.

What is the average length of the day in August in Roy?

The average day length in August is 13h and 17min.

When is the sunrise / sunset in August?

On the first day of August, sunrise is at 6:10 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 7:19 pm CDT.

How long on average sun shines in August?

The average sunshine duration in August is 10.2h.

When is the highest UV index?

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

How high is the UV index in August?

In August, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average max. wind speed
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
Roy, MS

Average temperature in August - Roy, MS
  • Average high temperature in August: 91.4°F

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (55°F).

  • Average low temperature in August: 71.8°F

The months with the highest average low temperature are July and August (71.8°F).
The coldest month (with the lowest average low temperature) is January (38.3°F).

Average pressure in August
Roy, MS

Average pressure in August - Roy, MS
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in August
Roy, MS

Average wind speed in August - Roy, MS
  • Average wind speed in August: 4.7mph

The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

Average humidity in August
Roy, MS

Average humidity in August - Roy, MS
  • Average humidity in August: 74%

The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in August
Roy, MS

Average rainfall in August - Roy, MS
  • Average rainfall in August: 3.58"

The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is November (2.09").

Average rainfall days in August
Roy, MS

Average rainfall days in August - Roy, MS
  • Average rainfall days in August: 19.9 days

The month with the highest number of rainy days is July (21.7 days).
The month with the least rainy days is November (8 days).

Average snowfall in August
Roy, MS

Average snowfall in August - Roy, MS
  • Average snowfall in August: 0"

The month with the highest snowfall is December (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in August
Roy, MS

Average snowfall days in August - Roy, MS
  • Average snowfall days in August: 0 days

The months with the highest number of snowfall days are January and December (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in August /
Average sunshine in August
Roy, MS

Average daylight in August / Average sunshine in August - Roy, MS
  • Average daylight in August: 13h and 2min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

Average sunshine days in August
Roy, MS

Average sunshine days in August - Roy, MS
  • Average sunshine days in August: 8.9 days

The months with the most sunshine days are October and November (20.4 days).
The month with the least sunshine days is July (7.5 days).

Average UV index in August
Roy, MS

Average UV index in August - Roy, MS
  • 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
Roy, MS

Average cloud cover in August - Roy, MS
  • Average cloud cover in August: 34

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 31).

Average visibility in August
Roy, MS

Average visibility in August - Roy, MS
  • Average visibility in August: 5mi

The months with the highest visibility are February, March, April, June, October and November (6mi).
The months with the lowest visibility are January, May, July, August, September and December (5mi).

Roy, Mississippi, USA

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