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 transition into August notes an average high-temperature of a still warm 82.8°F (28.2°C), revealing a mild distinction from the 84.2°F (29°C) in July. Nighttime temperature experiences an average drop to an enjoyable 65.7°F (18.7°C) in August.Heat index
For most parts of August, the heat index is appraised at a tropical 91.4°F (33°C). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.Consider that heat index readings are for situations in the shade and light wind. 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 'feels like' or 'felt air temperature', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In Dundas, the average relative humidity in August is 80%.Rainfall
In August, the rain falls for 13.2 days. Throughout August, 2.13" (54mm) of precipitation is accumulated. In Dundas, during the entire year, the rain falls for 152.3 days and collects up to 27.99" (711mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In August, the average length of the day is 13h and 38min.On the first day of August, sunrise is at 5:54 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 7:23 pm CDT.
Sunshine
In August, the average sunshine in Dundas is 10.3h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The average daily UV index of 6 in August transforms into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in August?
What is the average humidity in August in Dundas?
How much does it rain in August?
When it does not snow?
How many hours of daylight does Dundas have in August?
When is the sunrise / sunset in August in Dundas?
How long on average sun shines in August?
What are the months with the highest UV index?
How high is the UV index in August in Dundas?
Average temperature in August
Dundas, IL
- Average high temperature in August: 82.8°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in August: 65.7°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in August
Dundas, 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 (29.93"Hg).
Average wind speed in August
Dundas, IL
- Average wind speed in August: 6mph
The windiest months (with the highest average wind speed) are January and February (10.2mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in August
Dundas, IL
- Average humidity in August: 80%
The month with the highest relative humidity is July (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Dundas, IL
- Average rainfall in August: 2.13"
The wettest month (with the highest rainfall) is April (4.09").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in August
Dundas, IL
- Average rainfall days in August: 13.2 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in August
Dundas, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.54").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Dundas, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Dundas, 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 month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in August
Dundas, IL
- Average sunshine days in August: 14.3 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in August
Dundas, 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, November and December (UV index 2).
Average cloud cover in August
Dundas, IL
- Average cloud cover in August: 28
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in August
Dundas, 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).
Dundas, Illinois, USA
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