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
August's beginning signals an average high-temperature of a moderately hot 85.1°F (29.5°C), barely different from July's 87.3°F (30.7°C). Waterloo reports a consistent average low-temperature of 66.6°F (19.2°C) throughout August nights.Heat index
In August, the heat index is computed to be a sweltering 95°F (35°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.In the scope of the heat index, its values resonate with shade and light wind conditions. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
In Waterloo, Illinois, the average relative humidity in August is 77%.Rainfall
In August, the rain falls for 13.8 days. Throughout August, 2.76" (70mm) of precipitation is accumulated. In Waterloo, during the entire year, the rain falls for 139.8 days and collects up to 25.63" (651mm) of precipitation.Snowfall
In Waterloo, snow does not fall in April through August and October.Daylight
The average length of the day in August in Waterloo is 13h and 37min.On the first day of August, sunrise is at 6:03 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 7:31 pm CDT.
Sunshine
In Waterloo, the average sunshine in August is 10.3h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.Note: A daily high UV index of 6 in August leads to these guidelines:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Waterloo in August?
What is the average humidity in August in Waterloo?
How many days does it rain in August in Waterloo?
When it does not snow in Waterloo?
Does it snow in Waterloo in August?
What is the average length of the day in August in Waterloo?
When is the sunrise / sunset in August in Waterloo?
How long on average sun shines in August in Waterloo?
What are the months with the highest UV index in Waterloo?
What is the UV index reading in August in Waterloo?
Average temperature in August
Waterloo, IL
- Average high temperature in August: 85.1°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in August: 66.6°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in August
Waterloo, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Waterloo, IL
- Average wind speed in August: 5.5mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in August
Waterloo, IL
- Average humidity in August: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Waterloo, IL
- Average rainfall in August: 2.76"
The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are February and November (1.34").
Average rainfall days in August
Waterloo, IL
- Average rainfall days in August: 13.8 days
The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (6.3 days).
Average snowfall in August
Waterloo, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.89").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in August
Waterloo, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.3 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
Waterloo, IL
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 10h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in August
Waterloo, IL
- Average sunshine days in August: 14.9 days
The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in August
Waterloo, IL
- Average UV index in August: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in August
Waterloo, IL
- Average cloud cover in August: 27
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 27).
Average visibility in August
Waterloo, IL
- 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).
Waterloo, Illinois, USA
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