I-5 weather conditions near Castle Rock, Washington

Roadnow AI Agent Live Update

7 day weather forecast

• Overnight 2025-10-19, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. South wind around 6 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
• Sunday 2025-10-19, Showers. Showers and thunderstorms before 2pm, then showers and possibly a thunderstorm, mainly after 2pm. High near 57. South wind 8 to 14 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
• Sunday Night 2025-10-19, Chance Showers then Slight Chance Showers. A chance of showers before midnight, then a slight chance of showers after 4am. Mostly cloudy, with a low around 43. South southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%.
• Monday 2025-10-20, Slight Chance Showers then Mostly Sunny. A 20 percent chance of showers before 11am. Partly sunny, with a high near 60. Calm wind.
• Monday Night 2025-10-20, Partly Cloudy. Partly cloudy, with a low around 40. Calm wind.
• Tuesday 2025-10-21, Mostly Sunny. Mostly sunny, with a high near 64.
• Tuesday Night 2025-10-21, Mostly Clear. Mostly clear, with a low around 42.
• Wednesday 2025-10-22, Chance Rain. A chance of rain after 11am. Partly sunny, with a high near 64.
• Wednesday Night 2025-10-22, Rain Likely. Rain likely, mainly before 11pm. Mostly cloudy, with a low around 47.
• Thursday 2025-10-23, Rain Likely. Rain likely, mainly after 11am. Mostly cloudy, with a high near 61.
• Thursday Night 2025-10-23, Rain. Rain. Cloudy, with a low around 49.
• Friday 2025-10-24, Rain. Rain. Cloudy, with a high near 57.
• Friday Night 2025-10-24, Rain. Rain. Cloudy, with a low around 45.
• Saturday 2025-10-25, Rain. Rain. Cloudy, with a high near 54.