Temperatures will be in the 90s all week in Fontana, according to the National Weather Service.
Despite the warm weather, there will also be a risk of thunderstorms on Wednesday June 22.
Here is the forecast:
Monday, June 20 — Sunny, with a high near 97. Wind north 10 to 15 mph becoming northwest 5 to 10 mph in the afternoon. Winds could blow up to 25 mph.
Monday evening — Mainly clear with lows around 67. Wind west 10 to 15 mph becoming light and choppy in the evening. Winds could blow up to 20 mph.
Tuesday, June 21 — Sunny, with a high near 94. Wind light and variable becoming southwest 10 to 15 mph in the afternoon. Winds could blow up to 20 mph.
Tuesday evening — Mainly clear with a low around 66. Wind southwest 5 to 10 mph becoming light west in the evening. Winds could blow up to 20 mph.
Wednesday, June 22 — Showers and thunderstorms possible, mostly after 11 a.m. Mainly sunny with high near 95. Wind light south becoming west 5 to 10 mph in the morning. The chance of precipitation is 30%. New precipitation amounts less than a tenth of an inch except higher amounts possible in thunderstorms.
Wednesday evening — Mainly clear, with lows around 67.
Thursday, June 23 — Sunny, with a high near 95.