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 weather records an average high-temperature of a still warm 81°F (27.2°C), showing little deviation from July. Monticello observes an average nighttime temperature of 63.3°F (17.4°C) during August.Heat index
In August, the heat index is appraised at a tropical 87.8°F (31°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.The heat index's values are generally associated with conditions in shade and light breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are especially vital to children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
In Monticello, Illinois, the average relative humidity in August is 83%.Rainfall
In Monticello, in August, during 12.4 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 127.9 rainfall days, and 16.61" (422mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Monticello.Daylight
In August, the average length of the day in Monticello, Illinois, is 13h and 42min.On the first day of the month, sunrise is at 5:53 am and sunset at 8:07 pm. On the last day of August, in Monticello, Illinois, sunrise is at 6:21 am and sunset at 7:26 pm CDT.
Sunshine
The average sunshine in August in Monticello is 9.7h.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Monticello. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 6 in August leads to these recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Frequently asked questions
What is the usual temperature for Monticello in August?
What is the average humidity in August in Monticello?
How many days does it rain in August in Monticello?
When it does not snow in Monticello?
What is the average length of the day in August in Monticello?
When is the sunrise / sunset in August in Monticello?
How many hours of sunshine does Monticello have in August?
What are the months with the highest UV index in Monticello?
What is the UV index intensity in August in Monticello?
Average temperature in August
Monticello, IL
- Average high temperature in August: 81°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (32.4°F).
- Average low temperature in August: 63.3°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in August
Monticello, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Monticello, IL
- Average wind speed in August: 6.4mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in August
Monticello, IL
- Average humidity in August: 83%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in August
Monticello, IL
- Average rainfall in August: 1.54"
The wettest month (with the highest rainfall) is May (2.09").
The driest month (with the least rainfall) is December (0.91").
Average rainfall days in August
Monticello, IL
- Average rainfall days in August: 12.4 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in August
Monticello, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Monticello, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
Monticello, IL
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in August: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in August
Monticello, IL
- Average sunshine days in August: 15.9 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in August
Monticello, 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
Monticello, IL
- Average cloud cover in August: 32
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June, August and September (Cloud cover 32).
Average visibility in August
Monticello, IL
- Average visibility in August: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Monticello, Illinois, USA
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