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
Williamson's average high-temperature in August sits at a still warm 82.9°F (28.3°C), showing little difference from the previous month. During the nights in August, Williamson experiences a consistent average temperature of 65.5°F (18.6°C).Heat index
August's mean heat index is estimated at a hot 91.4°F (33°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.Consider that heat index readings are for situations in the shade and light wind. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. 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 hold great significance to children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
The average relative humidity in August is 80%.Rainfall
In August, the rain falls for 12.1 days. Throughout August, 1.57" (40mm) of precipitation is accumulated. Throughout the year, in Williamson, there are 121.4 rainfall days, and 14.72" (374mm) of precipitation is accumulated.Snowfall
In Williamson, snow does not fall in April through October.Daylight
The average length of the day in August in Williamson is 13h and 38min.On the first day of August, sunrise is at 6:00 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 7:30 pm CDT.
Sunshine
In August, the average sunshine is 9.9h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Williamson, Illinois. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 6 during August translates into the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Frequently asked questions
How hot does it get in Williamson in August?
What is the average humidity in August in Williamson?
How much does it rain in Williamson in August?
When it does not snow in Williamson?
How many hours of daylight does Williamson have in August?
When are sunrise and sunset in August in Williamson?
How long on average sun shines in August in Williamson?
What is the month with the highest UV index in Williamson?
What is the UV index reading in August in Williamson?
Average temperature in August
Williamson, IL
- Average high temperature in August: 82.9°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 (35.6°F).
- Average low temperature in August: 65.5°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 (22.6°F).
Average pressure in August
Williamson, 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
Williamson, IL
- Average wind speed in August: 5.9mph
The windiest month (with the highest average wind speed) is January (10mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in August
Williamson, 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 (71%).
Average rainfall in August
Williamson, IL
- Average rainfall in August: 1.57"
The wettest month (with the highest rainfall) is June (1.89").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in August
Williamson, IL
- Average rainfall days in August: 12.1 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in August
Williamson, IL
- Average snowfall in August: 0"
The month with the highest snowfall is December (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Williamson, 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 September (0 days).
Average daylight in August /
Average sunshine in August
Williamson, IL
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in August: 9h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in August
Williamson, IL
- Average sunshine days in August: 15.3 days
The month with the most sunshine days is January (20.9 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in August
Williamson, IL
- 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, November and December (UV index 2).
Average cloud cover in August
Williamson, IL
- Average cloud cover in August: 29
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July, August and September (Cloud cover 29).
Average visibility in August
Williamson, 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).
Williamson, Illinois, USA
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