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August Weather in Lake Forest, United States

Last updated: June 24, 2025

In Lake Forest, United States, the average temperature in August hovers around 23°C (74°F), making it a comfortable time to explore. Expect minimums dipping to 15°C (60°F) and maximums soaring up to 36°C (97°F). With a meager 2 mm (0.1 in) of precipitation over just 0 days, the weather is generally dry, complemented by an average humidity of 69%. Perfect conditions await for your adventures!

August Temperature in Lake Forest

In August in Lake Forest, the average temperature is 23°C (74°F), with maximums reaching up to 36°C (97°F) and minimums dropping as low as 15°C (60°F). This makes it an ideal time for travelers who enjoy warm weather but should be prepared for varying temperatures.

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

The chart illustrates August temperature patterns in Lake Forest, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lake Forest, August typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (97°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec565658626368737472686256
Data source: Temperature data for Lake Forest 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 Lake Forest

In Lake Forest in August, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

August Precipitation Trends in Lake Forest

The chart displays monthly precipitation patterns in Lake Forest, 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 Lake Forest, August typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec71606827131223102574
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Lake Forest

In Lake Forest in August humidity is 69%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making outdoor adventures enjoyable yet slightly sticky, perfect for leisurely strolls or exploring local attractions while staying hydrated.

August Average Humidity in Lake Forest

This chart illustrates the average monthly humidity levels in Lake Forest, 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 Lake Forest is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%79%75%71%70%72%73%69%68%67%68%71%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Lake Forest

In Lake Forest in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Lake Forest.

Maximum UV Index Levels in Lake Forest for August

The chart shows the monthly maximum UV Index (UVI) for Lake Forest 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 Lake Forest typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010754
Data source: Lake Forest 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 Lake Forest Compares to Other Months

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

This table compares monthly weather conditions in Lake Forest, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)71 mm (2.8 inches)74%moderate
February Weather13°C (56°F)60 mm (2.3 inches)79%high
March Weather14°C (58°F)68 mm (2.7 inches)75%very high
April Weather17°C (62°F)27 mm (1.1 inches)70%very high
May Weather17°C (64°F)13 mm (0.5 inches)70%extreme
June Weather20°C (68°F)1 mm (0.0 inches)72%extreme
July Weather23°C (73°F)2 mm (0.1 inches)73%extreme
August Weather23°C (74°F)2 mm (0.1 inches)69%very high
September Weather22°C (72°F)3 mm (0.1 inches)68%very high
October Weather20°C (69°F)10 mm (0.4 inches)67%high
November Weather17°C (62°F)25 mm (1.0 inches)68%moderate
December Weather13°C (56°F)74 mm (2.9 inches)71%moderate

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