Ontario In Weather Tomorrow

Today, 5-day weather forecast and conditions of the next few days


Located in Southern California's Inland Empire, this city has a fascinating history that reflects the region's growth and development over the years.

Originally inhabited by Native American tribes such as the Tongva and Serrano peoples, the area where Ontario now stands was rich in natural resources and served as a trading hub.

The arrival of Spanish explorers in the 18th century brought European influence to the region, leading to the establishment of missions and ranchos.

By the mid-19th century, the California Gold Rush attracted settlers to the area, including farmers and miners seeking opportunities in agriculture and mining.

The town of Ontario itself was founded in the late 19th century as a railway town, named after the Canadian province to attract investors from Canada.

The completion of the transcontinental railroad further spurred growth, making Ontario a key transportation hub for goods moving between Los Angeles and the rest of the country.

During the early 20th century, Ontario experienced rapid industrialization and urbanization, with industries such as citrus farming, dairy production, and manufacturing contributing to its economic prosperity.

World War II brought additional growth and development to Ontario, as the war effort increased demand for agricultural products and manufactured goods.

In the post-war era, Ontario continued to expand, attracting new residents and businesses drawn by its strategic location and economic opportunities.

Today, Ontario is a thriving city with a diverse economy, encompassing industries such as logistics, healthcare, education, and retail.

The city's rich history is preserved in its historic downtown area, museums, and cultural landmarks that showcase its journey from a small railroad town to a dynamic urban center.

Visitors to Ontario can explore its historic sites, enjoy shopping and dining experiences, and appreciate the blend of old-world charm and modern amenities.

As Ontario continues to evolve, its history remains an integral part of its identity, shaping its future growth and development.


A Mediterranean climate characterized by hot, dry summers and mild, wet winters. This climate is influenced by its inland location and proximity to the Pacific Ocean.

Summers in Ontario are typically hot and dry, with average temperatures ranging from the mid-80s to mid-90s Fahrenheit. Heatwaves are common during this time, with temperatures occasionally exceeding 100 degrees Fahrenheit. The lack of humidity makes the heat more bearable, but residents and visitors often seek relief in air-conditioned spaces or outdoor activities during cooler hours.

As autumn approaches, Ontario transitions into a milder period with temperatures dropping to the comfortable range of the mid-60s to low 70s Fahrenheit. This season also marks the start of the region's rainy season, with occasional rain showers contributing to the area's overall precipitation levels.

Winters in Ontario are mild compared to other parts of the country, with average temperatures ranging from the mid-40s to low 50s Fahrenheit. While snow is rare in this region, occasional frost or light freezing temperatures may occur during the coldest nights. The winter months also bring increased humidity due to the Pacific Ocean's influence, creating a slightly more moist environment.

Spring in Ontario is a vibrant time, with temperatures gradually warming up and flowers blooming across the landscape. Average highs range from the mid-70s to low 80s Fahrenheit, making it an ideal season for outdoor activities such as hiking, picnicking, and enjoying the blossoming flora.

One of the notable aspects of Ontario's climate is its relatively low annual precipitation levels, especially during the summer months. The region relies heavily on irrigation for agriculture and landscaping, given the arid nature of the climate.

Overall, Ontario's Mediterranean climate offers a blend of hot summers, mild winters, and a distinct change of seasons, making it a desirable destination for those seeking a variety of outdoor experiences throughout the year.


A diverse and vibrant city with a rich geographical landscape.

The city is situated in San Bernardino County, surrounded by the scenic beauty of the Inland Empire region.

Ontario is characterized by its mix of urban development and natural attractions, offering residents and visitors a variety of experiences.

The San Gabriel Mountains provide a stunning backdrop to Ontario, offering opportunities for outdoor activities such as hiking, camping, and skiing in the nearby resorts.

The city's climate is typically Mediterranean, with hot summers and mild winters, making it a desirable place to live and visit year-round.

Ontario is known for its diverse communities, cultural events, and culinary scene, reflecting the city's rich heritage and modern amenities.

The city's economy is diverse, with industries ranging from manufacturing and logistics to retail and hospitality.

In addition to its urban offerings, Ontario is close to several natural attractions, including parks, lakes, and recreational areas that showcase the region's natural beauty.

Overall, Ontario's geography offers a blend of urban convenience and natural splendor, making it a dynamic and welcoming city in Southern California.

Meteorological data collected and based on: