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
Crystal Lake, Illinois, measures an average high-temperature of a still warm 78.1°F (25.6°C) in August, nearly consistent with the preceding month. In August, the temperature drops to an average of 61.9°F (16.6°C) at night.Humidity
The average relative humidity in August is 82%.Rainfall
In Crystal Lake, during August, the rain falls for 17.3 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Crystal Lake, Illinois, during the entire year, the rain falls for 146.9 days and collects up to 21.22" (539mm) of precipitation.Snowfall
In Crystal Lake, snow does not fall in June through September.Daylight
The average length of the day in August is 13h and 50min.On the first day of the month, sunrise is at 5:46 am and sunset at 8:12 pm. On the last day of August, in Crystal Lake, sunrise is at 6:18 am and sunset at 7:28 pm CDT.
Sunshine
In Crystal Lake, the average sunshine in August is 9.8h.UV index
With an average maximum UV index of 6, August is the month with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In August, an average UV index of 6 transforms into the following instructions:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. 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. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What are August temperatures in Crystal Lake?
What is the average humidity in August in Crystal Lake?
How many days does it rain in August in Crystal Lake?
When it does not snow in Crystal Lake?
How many hours of daylight does Crystal Lake have in August?
What time are sunrise and sunset in August in Crystal Lake?
How long on average sun shines in August in Crystal Lake?
What is the month with the highest UV index in Crystal Lake?
What is the UV index reading in August in Crystal Lake?
Average temperature in August
Crystal Lake, IL
- Average high temperature in August: 78.1°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in August: 61.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in August
Crystal Lake, IL
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Crystal Lake, IL
- Average wind speed in August: 6.2mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in August
Crystal Lake, IL
- Average humidity in August: 82%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in August
Crystal Lake, IL
- Average rainfall in August: 2.52"
The wettest month (with the highest rainfall) is June (2.8").
The driest months (with the least rainfall) are November and December (0.94").
Average rainfall days in August
Crystal Lake, IL
- Average rainfall days in August: 17.3 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in August
Crystal Lake, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (3.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Crystal Lake, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (12.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Crystal Lake, IL
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 9h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in August
Crystal Lake, IL
- Average sunshine days in August: 10.4 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is July (10 days).
Average UV index in August
Crystal Lake, IL
- Average UV index in August: 6
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Crystal Lake, IL
- Average cloud cover in August: 33
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and September (Cloud cover 32).
Average visibility in August
Crystal Lake, IL
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January, February and August (5mi).
Crystal Lake, Illinois, USA
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