Ontario, California, boasts a Mediterranean climate characterized by hot, dry summers and mild, wet winters. This climate pattern influences various aspects of daily life, from outdoor activities to energy consumption.
Seasonal Weather Patterns
During the summer months, temperatures often soar into the mid-90s Fahrenheit, with August being the hottest month, averaging a high of 93°F and a low of 66°F. The hot season typically spans from late June to late September. In contrast, the cool season lasts from late November to mid-March, with average daily high temperatures below 71°F. January is the coolest month, averaging a high of 67°F and a low of 44°F. Rainfall is seasonally distributed, with the wettest months occurring during winter, particularly in February, which averages 2.14 inches of precipitation. Snow is uncommon due to Ontario’s relatively low elevation, though light snowfall may occur on rare occasions.
Environmental Initiatives
The City of Ontario is committed to managing its environmental resources comprehensively. The Environmental Resources Element of the city’s policy plan emphasizes the importance of reducing health risks, lowering energy and water costs, and protecting natural resources. Key principles include ensuring every resident has access to a healthy and safe environment and recognizing that protecting environmental resources is a shared responsibility among individuals, communities, and the region.
One notable program is the Fats, Oils, and Grease (FOG) Source Control Program, developed to prevent sanitary sewer overflows and protect the sewer system from detrimental impacts caused by improper disposal of oil and grease. This initiative underscores the city’s proactive approach to environmental stewardship.
Staying Informed and Engaged
Residents are encouraged to stay informed about local weather patterns and participate in community environmental programs. Understanding seasonal changes can help in planning activities and conserving resources. Engaging with city initiatives not only contributes to a healthier environment but also fosters a sense of community and shared responsibility.
By staying aware of Ontario’s climate and participating in local environmental efforts, residents can play a vital role in promoting sustainability and enhancing the quality of life in our community.

