Lake Forest (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Lake Forest.
Climate overview of Lake Forest
The climate in Lake Forest, California, United States of America, is marked by large temperature swings across the seasons, ranging from 31°C (88°F) in August to 19°C (66°F) in December.
The city has a relatively dry climate, receiving around 272 mm (11 in) of rainfall per year. It does experience a distinct dry season from March to November, with very warm summers and pleasant winters. December is the wettest month and June the driest. July is the sunniest month, averaging 12.3 hours of sunshine per day.
Lake Forest Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Lake Forest - and find the best time to visit.
Monthly Temperature in Lake Forest
In Lake Forest, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a very warm 31°C (88°F) in August to a pleasant 19°C (66°F) in December.
Nighttime temperatures range from 16°C (61°F) in August to 8°C (46°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Lake Forest
Lake Forest's climate is marked by below-average rainfall, accumulating 272 mm (11 in) of precipitation yearly. The seasons in Lake Forest bring significant changes in precipitation. The wettest month, December, receives moderate rainfall, with an average of 77 mm (3 in) of precipitation. This rainfall is distributed across 8 rainy days.
In contrast, the driest month, June, experiences much less rainfall, totaling 0.4 mm (0.02 in) over 0 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Lake Forest Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Lake Forest
In Lake Forest, summer days are longer and more sunny, with daily sunshine hours peaking at 12.3 hours in July. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 6.6 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Lake Forest
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, March, April, May, June, October and November
- Warmest weather: July, August and September
- Most sunshine: July and August
- Fewest rainy days: June, July, August and September
- Seasonal pattern: A distinct dry season from March to November, with very warm summers and pleasant winters
Frequently asked questions about the climate in Lake Forest
What is the best time to visit Lake Forest?
January, February, March, April, May, June, October and November typically offer the most optimal weather in Lake Forest. In contrast, July, August, September and December tend to have less optimal conditions. Lake Forest has a distinct dry season from March to November, with very warm summers and pleasant winters.
What temperatures can I expect in Lake Forest?
Daytime highs range from 19°C (66°F) in December to 31°C (88°F) in August. Nighttime lows range from 8°C (46°F) to 16°C (61°F). Temperatures vary considerably through the year.
How much rain does Lake Forest get?
Annual rainfall is around 272 mm (11 in). December is the wettest month with 77 mm (3 in), while June is the driest with 0.4 mm (0.02 in).
How sunny is Lake Forest?
Lake Forest receives around 3,279 hours of sunshine per year. July is the sunniest month with 369 hours, while January is the cloudiest with just 198 hours. Overall, Lake Forest enjoys abundant sunshine.
Lake Forest 3-Day Forecast
Lake Forest (CA) 3-Day Forecast
Lake Forest on the map
Lake Forest is highlighted - select any city to see its climate.
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