Ontario, CA Weather Forecast and Current Conditions

WEATHER ALERTS - Air Quality Alert

Current Conditions From Nearby Local Station

Partly Cloudy with Mist and Fog 53°F
Feels Like 53°F  
Humidity 80% Dew Point 47°F Wind Calm Barometer 30.05 in.
Solar Rad 83 w/m2
Report from a MADIS/MESONET weather station 1.9 mi. ESE of central Ontario
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Point Forecast at a Glance

SunDec 14
Sun Dec 14: Mostly Sunny, High 77F, Low 53F
77
53
MonDec 15
Mon Dec 15: Sunny, High 80F, Low 54F
80
54
TueDec 16
Tue Dec 16: Sunny, High 81F, Low 55F
81
55
WedDec 17
Wed Dec 17: Mostly Sunny, High 77F, Low 53F
77
53
ThuDec 18
Thu Dec 18: Mostly Sunny, High 79F, Low 54F
79
54
FriDec 19
Fri Dec 19: Mostly Sunny, High 76F, Low 52F
76
52
SatDec 20
Sat Dec 20: Mostly Sunny, High 72F
72
 

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7-Day Temperature Trend

Week Ahead Summary

High temperatures remain relatively stable through the week, ranging from 72°F to 81°F. Dry weather expected throughout the week.

Climate Context

This week's forecast shows temperatures running 13°F above the historical average for December. Normal highs for this period are around 64°F with lows around 41°F.

This Date in Weather History

1988 - Blowing snow was reported in western Kansas, as snow and gusty winds plagued the Central Rockies and Central High Plains. Colorado Springs CO reported thirteen inches of snow. Low pressure in Wisconsin brought heavy snow to the Lake Superior snowbelt area, with 22 inches reported at Marquette MI.

More on this and other weather history

Ontario, CA 7 Day Weather Forecast Details

Sunday Dec 14

Mostly Sunny

Day: Mostly sunny, with a high near 77. Calm wind becoming west around 5 mph in the afternoon.

Mostly Clear

Night: Mostly clear, with a low around 53. Northwest wind around 5 mph becoming calm.

Monday Dec 15

Sunny

Day: Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.

Mostly Clear

Night: Mostly clear, with a low around 54. North wind around 5 mph becoming calm.

Tuesday Dec 16

Sunny

Day: Sunny, with a high near 81. Calm wind becoming west around 5 mph in the afternoon.

Mostly Clear

Night: Mostly clear, with a low around 55.

Wednesday Dec 17

Mostly Sunny

Day: Mostly sunny, with a high near 77.

Mostly Clear

Night: Mostly clear, with a low around 53.

Thursday Dec 18

Mostly Sunny

Day: Mostly sunny, with a high near 79.

Partly Cloudy

Night: Partly cloudy, with a low around 54.

Friday Dec 19

Mostly Sunny

Day: Mostly sunny, with a high near 76.

Partly Cloudy

Night: Partly cloudy, with a low around 52.

Saturday Dec 20

Mostly Sunny

Day: Mostly sunny, with a high near 72.


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.