What is today's weather forecast for Ontario, CA?

Today's forecast for Ontario shows a high of 85 degrees and a low of 59 degrees Fahrenheit. Partly sunny, with a high near 85.

What is the 7-day weather forecast for Ontario, CA?

The 7-day forecast for Ontario shows highs from 60 to 85 degrees and lows from 47 to 59 degrees Fahrenheit. Expect precipitation on 5 days with chances of 20% or higher.

Will it rain in Ontario, CA this week?

Yes, rain is possible in Ontario this week. Precipitation chances: Thursday (86% chance), Friday (50% chance), Saturday (23% chance), Sunday (20% chance), Monday (24% chance).

How accurate is the Ontario weather forecast?

WeatherForYou provides highly accurate Ontario forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

Ontario, CA Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station Switch to Metric Units

60°F
Feels Like 60°F

Humidity 50% Dew Point 41°F Wind Calm Barometer 30.16 in.766.1 mm

Report from a MADIS/MESONET weather station 0 miles E of central Ontario
at 4:25 AM Tue, Nov 11, 2025

Current Conditions From Nearby Local Station Switch to Metric Units

60°F
Feels Like 60°F

Humidity 50% Dew Point 41°F Wind Calm Barometer 30.16 in.766.1 mm

Report from a MADIS/MESONET weather station 0 miles E of central Ontario
at 4:25 AM Tue, Nov 11, 2025

Point Forecast at a Glance

TueNov 11

WedNov 12

ThuNov 13

80%

FriNov 14

50%

SatNov 15

20%

SunNov 16

20%

MonNov 17

20%

7-Day Temperature Trend

Week Ahead Summary

High temperatures drop from 85°F to a low of 60°F, then recover to 62°F by week's end. Unsettled weather expected with rain likely on at least 5 days.

Climate Context

This week's forecast shows temperatures running 2°F below the historical average for November. Normal highs for this period are around 71°F with lows around 46°F.

This Date in Weather History

1987 - A deepening low pressure system brought heavy snow to the east central U.S. The Veteran's Day storm produced up to 17 inches of snow in the Washington D.C. area snarling traffic and closing schools and airports. Afternoon thunderstorms produced five inches of snow in three hours. Gale force winds lashed the Middle and Northern Atlantic Coast. Norfolk VA reported their earliest measurable snow in 99 years of records.

Ontario, CA 7 Day Weather Forecast Details

Tuesday Nov 11

Day: Partly sunny, with a high near 85. East wind 0 to 10 mph.

Night: Mostly cloudy, with a low around 59. West wind around 5 mph.

Wednesday Nov 12

Day: Mostly cloudy, with a high near 76. West wind 0 to 10 mph.

Night: Mostly cloudy, with a low around 55. West wind around 5 mph.

Thursday Nov 13

Day: Rain showers after 10am. Mostly cloudy, with a high near 71. Chance of precipitation is 80%.

Night: Rain showers before 10pm, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 53.

Friday Nov 14

Day: A chance of rain showers. Partly sunny, with a high near 60.

Night: A chance of rain showers. Mostly cloudy, with a low around 47.

Saturday Nov 15

Day: A slight chance of rain showers. Mostly sunny, with a high near 63.

Night: A slight chance of rain showers before 4am. Partly cloudy, with a low around 49.

Sunday Nov 16

Day: A slight chance of rain showers after 4pm. Mostly sunny, with a high near 64.

Night: A slight chance of rain showers. Mostly cloudy, with a low around 49.

Monday Nov 17

Day: A slight chance of rain showers. Partly sunny, with a high near 62.

Sun & Moon Monthly

First Light 5:54 AM

Sunrise 6:21 AM

Sunset 4:51 PM

Last Light 5:17 PM

Moonrise 10:08 PM

Moonset 12:32 PM

Moon Phase

Weather Near Ontario

Glendora, CA

San Bernardino, CA

Dunlap Acres, CA

Contiguous United States Extremes

Mon's High Temperature
100 at 2 Miles West Of Pala, CA

Mon's Low Temperature
3 at Pellston, MI

Weather Folklore

If cumulus clouds are smaller at sunset than at noon, expect fair weather.

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About Ontario, CA

Ontario is a city in southwestern San Bernardino County, California, United States, 35 miles (56 km) east of downtown Los Angeles and 23 miles (37 km) west of downtown San Bernardino, the county seat. Located in the western part of the Inland Empire metropolitan area, it lies just east of Los Angeles County and is part of the Greater Los Angeles Area. As of the 2020 census, the city had a population of 175,265. The city is home to Ontario International Airport, which is the 9th-busiest airport in the United States by cargo carried, as of 2021. Ontario handles the mass of freight traffic between the ports of Los Angeles and Long Beach and the rest of the country. It takes its name from the Ontario Model Colony development established in 1882 by the Canadian engineer George Chaffey and his brothers William Chaffey and Charles Chaffey. They named the settlement after their home province of Ontario.

Content from Wikipedia, licensed under CC BY-SA 3.0.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.