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Weather in Ontario, United States

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Time in Ontario6:22PM Wed, Oct 20

Tomorrow's weather summary

The weather in Ontario on Thursday, October 21st, will vary throughout the day from rainy condition to clear, with light rain.

According to our models moderate rain will appear during the evening and there is a high chance for clear sky before dawn.

Weather details for Ontario, on Thursday, October 21st:

The maximum temperature of the day will be 70°F around 3 pm. The day will be extremely humid, with average humidity of 76%, ranging from 57% to a maximum value of 100% at about 11 pm. The wind will be strong, and will get up to 15 mph at 4 pm, blowing from the south-west. The cloud coverage will be up to 100%.

The precipitation probability will change throughout the day between 0% and 25%. The highest chance for precipitation will be around 9 pm and the lowest probability around 12 am. The dew point will range from 40°F up to a maximum value of 57°F around 9 pm.

The visibility is expected to be good with average visibility of 9 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1017 hPa. Sunrise will be at 7:40 am, and sunset at 6:40 pm, making it a total of 11 hours of daylight.

Air quality forecast for Ontario, on Thursday, October 21st:

On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 40 and 45.

Pollen forecast for Ontario, on Thursday, October 21st:

The overall pollen forecast for this day shows no significant pollen. Tree pollen on this day is expected to have no risk. There's very low risk of weed pollen, and as for grass pollen, this day is expected to have no risk.

The weather in Ontario on Friday, October 22nd, will be cloudy for most of the day, with light fog in the early morning.

There's seems to be also high probability of fog in the early morning at about 5 am.

Weather information for Ontario, on Friday, October 22nd:

The highest temperature during the day will be 57°F at about 1 am. The day will be extremely humid, with average humidity of 86%, ranging from 69% to a maximum value of 100% at about 5 am. The wind will be light, and will get up to 8 mph at 1 am, blowing from the west. The cloud coverage will be up to 100%.

The precipitation probability will change throughout the day between 0% and 20%. The highest chance for precipitation will be around 12 am and the lowest probability around 3 am. The dew point will range from 46°F up to a maximum value of 57°F around 1 am.

The visibility is expected to be good with average visibility of 9 mi throughout the day. Atmospheric pressure will be normal with average pressure of 1017 hPa. Sunrise will be at 7:40 am, and sunset at 6:38 pm. The day will have 10 hours and 58 minutes of daylight.

Air quality forecast for Ontario, on Friday, October 22nd:

On average, the air quality on this day will be good, meaning that air quality is satisfactory, and air pollution poses little or no risk. According to our index, ranging from 0 to 500, the air quality is going to be between values of 31 and 43.

Pollen forecast for Ontario, on Friday, October 22nd:

The overall pollen forecast for this day shows no significant pollen. Tree pollen on this day is expected to have no risk. There's no risk of weed pollen, and as for grass pollen, this day is expected to have no risk.

Full Details

Air quality

AQI44
0100200300400500
AQI: Good

Pollen index

Tree
0/5
012345
Weed
1/5
012345
Grass
0/5
012345

Upcoming days

Full Details
Wed
20
45°68°
Thu
21
50°70°
Fri
22
45°57°
Sat
23
44°64°
Sun
24
53°59°
Mon
25
55°66°

FAQ

How warm does it get in Ontario?
The average annual highest temperature in Ontario is 26.8°C (80.2°F), and the July 22nd is the hottest day on average.
How cold does it get in Ontario?
The average annual lowest temperature in Ontario is -8.6°C (16.5°F), and the January 31st is the coldest day on average.
Which month has the most rain in Ontario?
The wettest months in Ontario are October and June.
What months does it snow in Ontario?
The most common time of year for snow is February, January, December, March and November.

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