Diamond Bar-Walnut Weather Forecast for the First Weekend of Summer

The National Weather Service forecast:

• Friday: Sunny, with a high near 92. West southwest wind 5 to 15 mph, with gusts as high as 20 mph.
• Friday Night: Mostly clear, with a low around 61. West southwest wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.
• Saturday: Sunny, with a high near 89. Light southwest wind becoming west southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
• Saturday Night: Mostly clear, with a low around 60. West southwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 20 mph.
• Sunday: Sunny, with a high near 86. Light west southwest wind increasing to 5 to 10 mph in the afternoon.
• Sunday Night: Clear, with a low around 59.
• Monday: Sunny, with a high near 88.