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
Rock Island signifies an average high-temperature of a still moderately hot 82.9°F (28.3°C) in August, closely mirroring the 83.1°F (28.4°C) of July. Rock Island logs a notable disparity from the daily highs during August, as the nighttime temperature lowers to an average of 56.3°F (13.5°C).Heat index
In August, the heat index is computed to be 82.4°F (28°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.Be advised, the heat index considers values for conditions in shade and with a light breeze. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Humidity
July and August, with an average relative humidity of 44%, are the least humid months.Rainfall
July and August are months with the least rain in Rock Island when the rain falls for 3.8 days and typically aggregates up to 0.24" (6mm) of rain.Snowfall
In Rock Island, snow does not fall in May through August and October.Daylight
The average length of the day in August is 14h and 11min.On the first day of August in Rock Island, sunrise is at 5:39 am and sunset at 8:33 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 7:41 pm PDT.
Sunshine
With an average of 12.1h of sunshine, August has the most sunshine of the year in Rock Island.UV index
The average daily maximum UV index in August in Rock Island is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 5 during August translates into the following directions:
Be vigilant - Preventing sunburn is recommended. To guard against the harmful effects of the Sun, minimize exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
How hot is it in Rock Island in August?
What are the least humid months in Rock Island?
What is the average humidity in August in Rock Island?
What is the driest month in Rock Island?
How much does it rain in Rock Island in August?
When it does not snow in Rock Island?
Does it snow in Rock Island in August?
How many hours of daylight does Rock Island have in August?
When are sunrise and sunset in August in Rock Island?
What month has the most sunshine in Rock Island?
How long on average sun shines in August in Rock Island?
What is the UV index intensity in August in Rock Island?
Average temperature in August
Rock Island, WA
- Average high temperature in August: 82.9°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in August: 56.3°F
The month with the highest average low temperature is August (56.3°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).
Average pressure in August
Rock Island, WA
- Average pressure in August: 29.93"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in August
Rock Island, WA
- Average wind speed in August: 5.9mph
The windiest month (with the highest average wind speed) is June (6.5mph).
The calmest month (with the lowest average wind speed) is December (3.7mph).
Average humidity in August
Rock Island, WA
- Average humidity in August: 44%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are July and August (44%).
Average rainfall in August
Rock Island, WA
- Average rainfall in August: 0.24"
The wettest months (with the highest rainfall) are January and December (1.57").
The driest months (with the least rainfall) are July and August (0.24").
Average rainfall days in August
Rock Island, WA
- Average rainfall days in August: 3.8 days
The month with the highest number of rainy days is March (13.8 days).
The month with the least rainy days is August (3.8 days).
Average snowfall in August
Rock Island, WA
- Average snowfall in August: 0"
The month with the highest snowfall is December (5.98").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in August
Rock Island, WA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is December (9.5 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in August /
Average sunshine in August
Rock Island, WA
- Average daylight in August: 14h and 1min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in August: 12h and 1min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in August
Rock Island, WA
- Average sunshine days in August: 25.4 days
The month with the most sunshine days is July (25.5 days).
The month with the least sunshine days is February (12.6 days).
Average UV index in August
Rock Island, WA
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in August
Rock Island, WA
- Average cloud cover in August: 11
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in August
Rock Island, WA
- Average visibility in August: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (4mi).
Rock Island, Washington, USA
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