Today | Weather | Wednesday, June 18, 2025
Heat Advisory (Issued when high temperatures and humidity create conditions that may be hazardous during outdoor activity or prolonged exposure.)
Ontario, California. 09:45 PM
Now
NightNighttime, with dark skies and stars or a moon visible.
75° F
Feels Like 72°
Precipitation 0 %
Wind 7 mph
Humidity 49 %
Today
Sunny WeatherSunny weather, clear skies and sunny weather.
Day 93°
Night 63°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Other:

Very warm with plenty of sun with a twist.

Ontario Weather Forecast Updated

Weather Forecast History

Last Year's Weather on This Day (June 18, 2024)

Day

79°

Night

59°