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July Weather in Lake Forest, United States

Last updated: June 24, 2025

In July, the average temperature in Lake Forest, United States is a pleasant 21°C (71°F). You can expect a minimum dip to 13°C (55°F) and a high of 29°C (85°F). During this month, precipitation averages around 69 mm (2.7 in) across 9 days, with an average humidity of 78%.

July Temperature in Lake Forest

In July in Lake Forest, the average temperature is 21°C (71°F), with maximums reaching up to 29°C (85°F) and minimums dropping as low as 13°C (55°F). This makes it a great time to explore Lake Forest, as the mild weather is perfect for outdoor activities and sightseeing.

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

The chart illustrates July 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, July typically has an average temperature of 21°C (71°F), with highs reaching up to 29°C (85°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec282835415062707267554034
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.

July Precipitation in Lake Forest

In Lake Forest in July, the precipitation amount is 69 mm (2.7 in) spread over 9 days.

July Precipitation Trends in Lake Forest

The chart displays monthly precipitation patterns in Lake Forest, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Lake Forest, July typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8585901251711056970851617775
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Lake Forest

In Lake Forest in July humidity is 78%. With an average temperature of 21°C (71°F), this humidity feels like a warm blanket wrapped around you, making travel a bit more challenging as it can lead to a sticky, heavy sensation, dampening the enjoyment of outdoor activities.

July Average Humidity in Lake Forest

This chart illustrates the average monthly humidity levels in Lake Forest, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Lake Forest is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Lake Forest

In Lake Forest in July, 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 July

The chart shows the monthly maximum UV Index (UVI) for Lake Forest in July, 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 July, the maximum UV index in Lake Forest typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101098532
Data source: Lake Forest July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)85 mm (3.3 inches)85%low
February Weather-2°C (29°F)85 mm (3.3 inches)85%moderate
March Weather2°C (36°F)90 mm (3.6 inches)85%high
April Weather5°C (41°F)125 mm (4.9 inches)85%very high
May Weather10°C (50°F)171 mm (6.7 inches)78%very high
June Weather16°C (62°F)105 mm (4.1 inches)80%very high
July Weather21°C (71°F)69 mm (2.7 inches)78%very high
August Weather22°C (72°F)70 mm (2.8 inches)76%very high
September Weather19°C (67°F)85 mm (3.4 inches)79%very high
October Weather13°C (55°F)161 mm (6.3 inches)83%moderate
November Weather5°C (41°F)77 mm (3.0 inches)88%moderate
December Weather1°C (35°F)75 mm (2.9 inches)81%low

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