San Bernardino weather heats up this week locals brace for sunny afternoons and cool clear nights see your 3 day forecast

San Bernardino is stepping into classic Inland Empire mode this week — calm, mild starts to the day, followed by dry, sun-soaked afternoons and clear, slightly cooler nights that make summer evenings feel just right.

Whether you’re planning a morning hike in the foothills, afternoon errands downtown, or a backyard BBQ with family, here’s your San Bernardino 3-day forecast to help you beat the heat and stay comfortable.

San Bernardino 3-Day Weather Forecast

What to expect in San Bernardino

Monday eases you in with a gentle sunrise and low 80s by midday, climbing to an afternoon high near 88°F. It’s warm but manageable — perfect for a late lunch outside or a park visit with the kids.

Tuesday turns up the dial a bit more. The morning stays pleasant, but by early afternoon expect a steady climb into the low 90s. Make sure to hydrate and shade up if you’re outside during peak sun.

Wednesday brings the week’s hottest stretch, flirting with 92°F but balanced by San Bernardino’s dry air. It’s an ideal day to run errands early, chill indoors during peak heat, and then enjoy a cooler evening breeze once the sun dips behind the mountains.

Locals know the Inland Empire rule: respect the sun, plan smart, and savor those calm, warm nights that make Southern California summers so special.