August weather forecastAnnapolis, IL
August
Weather in August
August, the last month of the summer in Annapolis, is also a moderately hot month, with an average temperature fluctuating between 82.2°F (27.9°C) and 64.8°F (18.2°C).Temperature
In August, the average high-temperature registers at a still moderately hot 82.2°F (27.9°C), nearly identical to July's 83.8°F (28.8°C). Throughout the nights in August, an average low-temperature of 64.8°F (18.2°C) is noted in Annapolis.Heat index
The heat index value for August is computed to be a hot 89.6°F (32°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
July and August, with an average relative humidity of 81%, are the most humid months.Rainfall
In Annapolis, in August, it is raining for 13 days, with typically 2.17" (55mm) of accumulated precipitation. Throughout the year, there are 147.2 rainfall days, and 27.87" (708mm) of precipitation is accumulated.Snowfall
In Annapolis, snow does not fall in May through October.Daylight
The average length of the day in August is 13h and 39min.On the first day of the month, sunrise is at 5:52 am and sunset at 8:02 pm. On the last day of August, in Annapolis, Illinois, sunrise is at 6:19 am and sunset at 7:22 pm CDT.
Sunshine
In August, the average sunshine is 10.2h.UV index
The months with the highest UV index in Annapolis are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 6 during August leads to these instructions:
Inhibit overexposure. Warding off sun damage is of utmost importance. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Annapolis, IL
- Average high temperature in August: 82.2°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in August: 64.8°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in August
Annapolis, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Annapolis, IL
- Average wind speed in August: 6mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in August
Annapolis, IL
- Average humidity in August: 81%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Annapolis, IL
- Average rainfall in August: 2.17"
The wettest month (with the highest rainfall) is April (4.13").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in August
Annapolis, IL
- Average rainfall days in August: 13 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in August
Annapolis, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in August
Annapolis, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6 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
Annapolis, IL
- Average daylight in August: 13h and 42min
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: 10h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in August
Annapolis, IL
- Average sunshine days in August: 14.9 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in August
Annapolis, 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
Annapolis, IL
- Average cloud cover in August: 29
The months with the most cloud cover are January and February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in August
Annapolis, 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).
