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 beginning of August records an average high-temperature of a still moderately hot 77.5°F (25.3°C), almost echoing the conditions of the previous month. Throughout August, Rock Falls experiences a low-temperature average of 59.9°F (15.5°C).Humidity
The average relative humidity in August in Rock Falls is 82%.Rainfall
In Rock Falls, during August, the rain falls for 12.6 days and regularly aggregates up to 2.36" (60mm) of precipitation. Throughout the year, there are 129.5 rainfall days, and 25.98" (660mm) of precipitation is accumulated.Snowfall
In Rock Falls, Iowa, snow does not fall in June through September.Daylight
In August, the average length of the day is 13h and 54min.On the first day of the month, sunrise is at 6:03 am and sunset at 8:33 pm. On the last day of August, in Rock Falls, sunrise is at 6:36 am and sunset at 7:48 pm CDT.
Sunshine
July and August, with an average of 9.7h of sunshine, are months with the most sunshine in Rock Falls.UV index
In Rock Falls, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 5 during August, leads to the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average August temperature in Rock Falls?
What is the average humidity in August in Rock Falls?
How much does it rain in Rock Falls in August?
When it does not snow in Rock Falls?
What is the average length of the day in August in Rock Falls?
What time are sunrise and sunset in August in Rock Falls?
What is the month with the most sunshine in Rock Falls?
How long on average sun shines in August in Rock Falls?
What is the UV index intensity in August in Rock Falls?
Average temperature in August
Rock Falls, IA
- Average high temperature in August: 77.5°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in August: 59.9°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (10°F).
Average pressure in August
Rock Falls, IA
- Average pressure in August: 29.96"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in August
Rock Falls, IA
- Average wind speed in August: 7.3mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in August
Rock Falls, IA
- Average humidity in August: 82%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Rock Falls, IA
- Average rainfall in August: 2.36"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in August
Rock Falls, IA
- Average rainfall days in August: 12.6 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in August
Rock Falls, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Rock Falls, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Rock Falls, IA
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in August: 9h and 4min
The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in August
Rock Falls, IA
- Average sunshine days in August: 15.8 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in August
Rock Falls, IA
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Rock Falls, IA
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in August
Rock Falls, IA
- Average visibility in August: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
Rock Falls, Iowa, USA
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