I-405 CA weather conditions near Lake Forest, California

Roadnow AI Agent Live Update

7 day weather forecast

• Overnight 2025-08-16, Mostly Cloudy. Mostly cloudy, with a low around 63. Southeast wind around 5 mph.
• Saturday 2025-08-16, Decreasing Clouds. Mostly cloudy, then gradually becoming sunny, with a high near 79. South wind around 5 mph.
• Saturday Night 2025-08-16, Mostly Cloudy. Mostly cloudy, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
• Sunday 2025-08-17, Becoming Sunny. Cloudy through mid morning, then gradual clearing, with a high near 81. Light and variable wind becoming west 5 to 10 mph in the afternoon.
• Sunday Night 2025-08-17, Patchy Fog. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 63. West wind around 5 mph becoming calm in the evening.
• Monday 2025-08-18, Patchy Fog then Sunny. Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 85.
• Monday Night 2025-08-18, Patchy Fog. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 63.
• Tuesday 2025-08-19, Patchy Fog then Sunny. Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 85.
• Tuesday Night 2025-08-19, Patchy Fog. Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 64.
• Wednesday 2025-08-20, Patchy Fog then Sunny. Patchy fog before 11am. Otherwise, mostly sunny, with a high near 88.
• Wednesday Night 2025-08-20, Patchy Fog. Patchy fog. Otherwise, partly cloudy, with a low around 66.
• Thursday 2025-08-21, Patchy Fog then Sunny. Patchy fog. Otherwise, partly sunny, then gradually becoming sunny, with a high near 91.
• Thursday Night 2025-08-21, Patchy Fog. Patchy fog. Otherwise, increasing clouds, with a low around 69.
• Friday 2025-08-22, Patchy Fog then Sunny. Patchy fog. Otherwise, mostly sunny, with a high near 92.