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August Weather in Crystal Lake, United States

Last updated: June 24, 2025

In August, the average temperature in Crystal Lake, United States is a warm 28°C (82°F), with minimums dipping to 23°C (74°F) and maximums soaring to 35°C (95°F). Visitors should be prepared for occasional rain, as the region experiences an average precipitation of 231 mm (9.1 in) over 27 days. With an average humidity level of 80%, it’s essential to stay hydrated and plan for the tropical climate!

August Temperature in Crystal Lake

In August, in Crystal Lake, the average temperature is 28°C (82°F). Maximums can reach 35°C (95°F), and minimums can be as low as 23°C (74°F). This makes Crystal Lake a warm and pleasant destination for travelers looking to enjoy a sunny getaway.

August Weather in Crystal Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Crystal Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Crystal Lake, August typically has an average temperature of 28°C (82°F), with highs reaching up to 35°C (95°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec616769747881818281786964
Data source: Temperature data for Crystal Lake generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Crystal Lake

In Crystal Lake in August, the total precipitation amount is 231 mm (9.1 in) over the course of 27 days.

August Precipitation Trends in Crystal Lake

The chart displays monthly precipitation patterns in Crystal Lake, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Crystal Lake, August typically receives around 231 mm (9.1 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec40601766130222249231186734458
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Crystal Lake

In Crystal Lake in August, humidity is 80%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities sweaty and demanding frequent breaks in the shade while traveling.

August Average Humidity in Crystal Lake

This chart illustrates the average monthly humidity levels in Crystal Lake, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Crystal Lake is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%68%65%73%77%80%83%83%83%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Crystal Lake

In Crystal Lake in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Crystal Lake.

Maximum UV Index Levels in Crystal Lake for August

The chart shows the monthly maximum UV Index (UVI) for Crystal Lake in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Crystal Lake typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810111112121111975
Data source: Crystal Lake August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Crystal Lake Compares to Other Months

Weather in Crystal Lake varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Crystal Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Crystal Lake, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (62°F)40 mm (1.6 inches)83%high
February Weather20°C (68°F)59 mm (2.3 inches)80%very high
March Weather21°C (69°F)17 mm (0.7 inches)75%very high
April Weather23°C (74°F)66 mm (2.6 inches)68%extreme
May Weather26°C (79°F)130 mm (5.1 inches)65%extreme
June Weather27°C (81°F)222 mm (8.7 inches)73%extreme
July Weather27°C (82°F)249 mm (9.8 inches)77%extreme
August Weather28°C (82°F)231 mm (9.1 inches)80%extreme
September Weather27°C (81°F)186 mm (7.3 inches)83%extreme
October Weather25°C (78°F)73 mm (2.9 inches)83%very high
November Weather21°C (69°F)44 mm (1.7 inches)83%high
December Weather18°C (65°F)58 mm (2.3 inches)84%moderate

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