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 onset of August brings with it an average high-temperature of a still warm 81.1°F (27.3°C), showing a negligible variation from the month before. Throughout August, Lewis anticipates an average low-temperature of 62.2°F (16.8°C).Heat index
The heat index in August is computed to be a hot 86°F (30°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Humidity
The average relative humidity in August is 79%.Rainfall
In Lewis, in August, it is raining for 12.8 days, with typically 2.48" (63mm) of accumulated precipitation. Throughout the year, in Lewis, there are 118.7 rainfall days, and 20.79" (528mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Lewis, the average length of the day in August is 13h and 47min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:36 pm. On the last day of August, sunrise is at 6:46 am and sunset at 7:54 pm CDT.
Sunshine
In August, the average sunshine is 9.8h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 6 in August converts into the following recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures in Lewis?
What is the average humidity in August?
How much does it rain in August?
When it does not snow?
How many hours of daylight does Lewis have in August?
When are sunrise and sunset in August?
How many hours of sunshine does Lewis have in August?
When is the highest UV index?
What is the UV index reading in August?
Average temperature in August
Lewis, IA
- Average high temperature in August: 81.1°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in August: 62.2°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in August
Lewis, IA
- Average pressure in August: 29.96"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
Lewis, IA
- Average wind speed in August: 7.3mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in August
Lewis, IA
- Average humidity in August: 79%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (69%).
Average rainfall in August
Lewis, IA
- Average rainfall in August: 2.48"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in August
Lewis, IA
- Average rainfall days in August: 12.8 days
The month with the highest number of rainy days is June (16.4 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in August
Lewis, IA
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Lewis, IA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Lewis, IA
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 9h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in August
Lewis, IA
- Average sunshine days in August: 14.9 days
The month with the most sunshine days is December (21.2 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in August
Lewis, IA
- Average UV index in August: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in August
Lewis, IA
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in August
Lewis, IA
- 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).
Lewis, Iowa, USA
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