Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The advent of August presents an average high-temperature of a still hot 92.3°F (33.5°C), maintaining a close correlation with the preceding month. August witnesses a substantial contrast between the daytime highs and the average low of 69.4°F (20.8°C).Heat index
In August, the average heat index is appraised at a life-threatening hot 113°F (45°C). Caution: Heat cramps along with heat exhaustion are expected. Sustained activity could lead to heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
August is the least humid month, with an average relative humidity of 69%.Rainfall
In August, the rain falls for 14.9 days. Throughout August, 3.27" (83mm) of precipitation is accumulated. Throughout the year, there are 149.7 rainfall days, and 35.08" (891mm) of precipitation is accumulated.Snowfall
In Rock Island, snow does not fall in April through October.Daylight
The average length of the day in August is 13h and 26min.On the first day of the month, sunrise is at 6:27 am and sunset at 8:20 pm. On the last day of August, sunrise is at 6:50 am and sunset at 7:45 pm CDT.
Sunshine
The months with the most sunshine are July and August, with an average of 10.8h of sunshine.UV index
In August, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in August converts into the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. 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. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in August?
What is the least humid month?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
What is the average length of the day in August in Rock Island?
When are sunrise and sunset in August in Rock Island?
What is the month with the most sunshine?
How many hours of sunshine does Rock Island have in August?
What is the UV index reading in August?
Average temperature in August
Rock Island, OK
- Average high temperature in August: 92.3°F
The warmest month (with the highest average high temperature) is July (93.4°F).
The month with the lowest average high temperature is January (48°F).
- Average low temperature in August: 69.4°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).
Average pressure in August
Rock Island, OK
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Rock Island, OK
- Average wind speed in August: 4.8mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in August
Rock Island, OK
- Average humidity in August: 69%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (69%).
Average rainfall in August
Rock Island, OK
- Average rainfall in August: 3.27"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in August
Rock Island, OK
- Average rainfall days in August: 14.9 days
The month with the highest number of rainy days is March (15.4 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in August
Rock Island, OK
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Rock Island, OK
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (1.9 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
Rock Island, OK
- Average daylight in August: 13h 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 August: 10h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in August
Rock Island, OK
- Average sunshine days in August: 13.8 days
The months with the most sunshine days are November and December (19.3 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in August
Rock Island, OK
- Average UV index in August: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in August
Rock Island, OK
- Average cloud cover in August: 24
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in August
Rock Island, 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).
Rock Island, Oklahoma, USA
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