What is the weather in Ontario right now?

Current weather in Ontario is clear sky.

Where can I find the hourly weather forecast for Ontario?

This page shows hourly weather forecast for Ontario, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Ontario updated regularly?

Weather data for Ontario is updated regularly with the latest available observations and forecasts.

Now · 6:41 PM

Ontario Weather & Hourly Forecast

United States · California · 91761

86°F

Sunny

Feels like: 85°F

💧 Humidity 44% 🌡 Pressure 29.80 inHg 💨 Wind 7 mph 👁 Visibility 25.9 mi ☁ Clouds 0% ☀️ UV index 0.4 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Ontario

Today

7:00 PM

Sunny

86° 💧 None 💨 7 mph H 44%29.80 inHg

10:00 PM

Clear night

80° 💧 None 💨 3 mph H 57%29.85 inHg

Tomorrow

1:00 AM

Clear night

75° 💧 None 💨 4 mph H 68%29.85 inHg

4:00 AM

Clear night

72° 💧 None 💨 2 mph H 77%29.85 inHg

7:00 AM

Sunny

70° 💧 None 💨 2 mph H 84%29.88 inHg

10:00 AM

Sunny

84° 💧 None 💨 2 mph H 50%29.91 inHg

1:00 PM

Sunny

95° 💧 None 💨 5 mph H 33%29.85 inHg

4:00 PM

Sunny

94° 💧 None 💨 10 mph H 37%29.80 inHg

7:00 PM

Sunny

81° 💧 None 💨 9 mph H 54%29.83 inHg

10:00 PM

Clear night

75° 💧 None 💨 5 mph H 69%29.88 inHg

Sunday

1:00 AM

Clear night

72° 💧 None 💨 3 mph H 78%29.88 inHg

4:00 AM

Mostly clear night

69° 💧 None 💨 2 mph H 90%29.85 inHg

7:00 AM

Fog

67° 💧 None 💨 2 mph H 97%29.88 inHg

10:00 AM

Sunny

80° 💧 None 💨 0 mph H 58%29.88 inHg

1:00 PM

Sunny

91° 💧 None 💨 5 mph H 31%29.83 inHg

4:00 PM

Sunny

90° 💧 None 💨 10 mph H 33%29.77 inHg

Today

7:00 PM

Sunny

86° 💧 None 💨 7 mph H 44%29.80 inHg

8:00 PM

Clear night

83° 💧 None 💨 5 mph H 50%29.80 inHg

9:00 PM

Clear night

81° 💧 None 💨 4 mph H 53%29.83 inHg

10:00 PM

Clear night

80° 💧 None 💨 3 mph H 57%29.85 inHg

11:00 PM

Clear night

78° 💧 None 💨 4 mph H 61%29.85 inHg

Tomorrow

12:00 AM

Clear night

76° 💧 None 💨 4 mph H 64%29.85 inHg

1:00 AM

Clear night

75° 💧 None 💨 4 mph H 68%29.85 inHg

2:00 AM

Clear night

74° 💧 None 💨 3 mph H 71%29.85 inHg

3:00 AM

Clear night

73° 💧 None 💨 3 mph H 74%29.85 inHg

4:00 AM

Clear night

72° 💧 None 💨 2 mph H 77%29.85 inHg

5:00 AM

Clear night

71° 💧 None 💨 2 mph H 80%29.85 inHg

6:00 AM

Clear night

70° 💧 None 💨 2 mph H 82%29.88 inHg

7:00 AM

Sunny

70° 💧 None 💨 2 mph H 84%29.88 inHg

8:00 AM

Sunny

73° 💧 None 💨 1 mph H 75%29.91 inHg

9:00 AM

Sunny

79° 💧 None 💨 1 mph H 61%29.91 inHg

10:00 AM

Sunny

84° 💧 None 💨 2 mph H 50%29.91 inHg

11:00 AM

Sunny

88° 💧 None 💨 2 mph H 41%29.88 inHg

12:00 PM

Sunny

92° 💧 None 💨 4 mph H 35%29.88 inHg

1:00 PM

Sunny

95° 💧 None 💨 5 mph H 33%29.85 inHg

2:00 PM

Sunny

96° 💧 None 💨 8 mph H 33%29.83 inHg

3:00 PM

Sunny

95° 💧 None 💨 9 mph H 34%29.83 inHg

4:00 PM

Sunny

94° 💧 None 💨 10 mph H 37%29.80 inHg

5:00 PM

Sunny

91° 💧 None 💨 10 mph H 43%29.80 inHg

6:00 PM

Sunny

86° 💧 None 💨 10 mph H 48%29.80 inHg

7:00 PM

Sunny

81° 💧 None 💨 9 mph H 54%29.83 inHg

8:00 PM

Clear night

78° 💧 None 💨 7 mph H 60%29.83 inHg

9:00 PM

Clear night

77° 💧 None 💨 5 mph H 66%29.85 inHg

10:00 PM

Clear night

75° 💧 None 💨 5 mph H 69%29.88 inHg

11:00 PM

Clear night

74° 💧 None 💨 4 mph H 73%29.88 inHg

Sunday

12:00 AM

Clear night

73° 💧 None 💨 3 mph H 75%29.88 inHg

1:00 AM

Clear night

72° 💧 None 💨 3 mph H 78%29.88 inHg

2:00 AM

Mostly clear night

71° 💧 None 💨 4 mph H 83%29.88 inHg

3:00 AM

Mostly clear night

70° 💧 None 💨 3 mph H 87%29.88 inHg

4:00 AM

Mostly clear night

69° 💧 None 💨 2 mph H 90%29.85 inHg

5:00 AM

Mostly clear night

68° 💧 None 💨 3 mph H 93%29.88 inHg

6:00 AM

Mostly clear night

68° 💧 None 💨 2 mph H 95%29.88 inHg

7:00 AM

Fog

67° 💧 None 💨 2 mph H 97%29.88 inHg

8:00 AM

Mostly sunny

70° 💧 None 💨 1 mph H 87%29.88 inHg

9:00 AM

Sunny

75° 💧 None 💨 1 mph H 72%29.88 inHg

10:00 AM

Sunny

80° 💧 None 💨 0 mph H 58%29.88 inHg

11:00 AM

Sunny

85° 💧 None 💨 2 mph H 45%29.88 inHg

12:00 PM

Sunny

88° 💧 None 💨 4 mph H 35%29.85 inHg

1:00 PM

Sunny

91° 💧 None 💨 5 mph H 31%29.83 inHg

2:00 PM

Sunny

92° 💧 None 💨 7 mph H 29%29.80 inHg

3:00 PM

Sunny

92° 💧 None 💨 9 mph H 30%29.77 inHg

4:00 PM

Sunny

90° 💧 None 💨 10 mph H 33%29.77 inHg

5:00 PM

Sunny

87° 💧 None 💨 10 mph H 35%29.77 inHg

6:00 PM

Sunny

84° 💧 None 💨 9 mph H 39%29.77 inHg

7:00 PM

Sunny

80° 💧 None 💨 8 mph H 46%29.77 inHg

8:00 PM

Clear night

77° 💧 None 💨 6 mph H 53%29.80 inHg

9:00 PM

Clear night

75° 💧 None 💨 5 mph H 59%29.80 inHg

10:00 PM

Clear night

74° 💧 None 💨 3 mph H 63%29.83 inHg

11:00 PM

Clear night

72° 💧 None 💨 3 mph H 67%29.83 inHg

Monday

12:00 AM

Clear night

71° 💧 None 💨 3 mph H 72%29.83 inHg

1:00 AM

Clear night

69° 💧 None 💨 3 mph H 77%29.83 inHg

2:00 AM

Clear night

68° 💧 None 💨 3 mph H 82%29.83 inHg

3:00 AM

Clear night

67° 💧 None 💨 3 mph H 87%29.83 inHg

4:00 AM

Clear night

66° 💧 None 💨 3 mph H 90%29.83 inHg

5:00 AM

Clear night

65° 💧 None 💨 2 mph H 92%29.83 inHg

2:00 PM

Sunny

93° 💧 None 💨 5 mph H 26%29.77 inHg

5:00 PM

Sunny

88° 💧 None 💨 11 mph H 40%29.71 inHg

8:00 PM

Clear night

77° 💧 None 💨 5 mph H 59%29.77 inHg

11:00 PM

Clear night

73° 💧 None 💨 4 mph H 68%29.85 inHg

Tuesday

2:00 AM

Clear night

70° 💧 None 💨 3 mph H 78%29.85 inHg

5:00 AM

Mostly clear night

67° 💧 None 💨 3 mph H 88%29.85 inHg

8:00 AM

Mostly sunny

69° 💧 None 💨 2 mph H 81%29.91 inHg

11:00 AM

Sunny

83° 💧 None 💨 3 mph H 43%29.88 inHg

2:00 PM

Sunny

91° 💧 None 💨 7 mph H 28%29.83 inHg

5:00 PM

Sunny

86° 💧 None 💨 10 mph H 39%29.83 inHg

8:00 PM

Clear night

74° 💧 None 💨 6 mph H 61%29.88 inHg

11:00 PM

Clear night

70° 💧 None 💨 3 mph H 72%29.94 inHg

Wednesday

2:00 AM

Clear night

67° 💧 None 💨 3 mph H 85%29.94 inHg

5:00 AM

Clear night

65° 💧 None 💨 2 mph H 90%29.94 inHg

8:00 AM

Sunny

67° 💧 None 💨 2 mph H 81%29.97 inHg

11:00 AM

Sunny

82° 💧 None 💨 2 mph H 42%29.97 inHg

2:00 PM

Sunny

90° 💧 None 💨 6 mph H 27%29.91 inHg

5:00 PM

Sunny

86° 💧 None 💨 10 mph H 39%29.88 inHg

8:00 PM

Clear night

75° 💧 None 💨 6 mph H 53%29.94 inHg

11:00 PM

Clear night

71° 💧 None 💨 3 mph H 66%30.00 inHg

Thursday

2:00 AM

Clear night

67° 💧 None 💨 3 mph H 79%30.00 inHg

5:00 AM

Clear night

65° 💧 None 💨 2 mph H 87%30.00 inHg

8:00 AM

Sunny

67° 💧 None 💨 2 mph H 76%30.03 inHg

11:00 AM

Sunny

83° 💧 None 💨 2 mph H 36%30.03 inHg

5:00 PM

Sunny

81° 💧 None 💨 3 mph H 41%30.03 inHg

11:00 PM

Clear night

89° 💧 None 💨 9 mph H 33%29.91 inHg

Friday

5:00 AM

Clear night

72° 💧 None 💨 3 mph H 64%30.00 inHg

11:00 AM

Sunny

65° 💧 None 💨 2 mph H 82%29.97 inHg

5:00 PM

Sunny

82° 💧 None 💨 2 mph H 41%29.97 inHg

11:00 PM

Clear night

89° 💧 None 💨 8 mph H 29%29.83 inHg

Saturday

5:00 AM

Clear night

74° 💧 None 💨 2 mph H 56%29.91 inHg

11:00 AM

Sunny

66° 💧 None 💨 2 mph H 77%29.88 inHg

5:00 PM

Sunny

82° 💧 None 💨 2 mph H 38%29.88 inHg

11:00 PM

Clear night

89° 💧 None 💨 10 mph H 32%29.74 inHg

Sunday

5:00 AM

Clear night

72° 💧 None 💨 2 mph H 63%29.85 inHg

11:00 AM

Sunny

65° 💧 None 💨 1 mph H 82%29.85 inHg

5:00 PM

Sunny

78° 💧 None 💨 3 mph H 50%29.85 inHg

11:00 PM

Clear night

89° 💧 None 💨 9 mph H 36%29.74 inHg

Monday

5:00 AM

Clear night

72° 💧 None 💨 2 mph H 68%29.88 inHg

11:00 AM

Mostly cloudy

66° 💧 None 💨 1 mph H 94%29.85 inHg

5:00 PM

Sunny

82° 💧 None 💨 5 mph H 52%29.85 inHg

11:00 PM

Partly cloudy night

88° 💧 None 💨 10 mph H 39%29.74 inHg

Tuesday

5:00 AM

Clear night

71° 💧 None 💨 4 mph H 80%29.83 inHg

11:00 AM

Sunny

67° 💧 None 💨 2 mph H 92%29.80 inHg

5:00 PM

Sunny

81° 💧 None 💨 3 mph H 52%29.80 inHg

11:00 PM

Clear night

87° 💧 None 💨 10 mph H 44%29.68 inHg

Wednesday

5:00 AM

Clear night

72° 💧 None 💨 4 mph H 77%29.80 inHg

11:00 AM

Mostly sunny

68° 💧 None 💨 3 mph H 89%29.80 inHg

5:00 PM

Light rain

79° 💧 None 💨 4 mph H 59%29.83 inHg

11:00 PM

Light rain

83° 💧 None 💨 6 mph H 51%29.77 inHg

Thursday

5:00 AM

Mostly clear night

71° 💧 None 💨 5 mph H 76%29.88 inHg

11:00 AM

Mostly sunny

67° 💧 None 💨 4 mph H 89%29.91 inHg

5:00 PM

Mostly cloudy

75° 💧 None 💨 3 mph H 64%29.97 inHg

11:00 PM

Overcast night

73° 💧 None 💨 8 mph H 68%29.94 inHg

Friday

5:00 AM

Mostly clear night

69° 💧 None 💨 4 mph H 79%30.00 inHg

11:00 AM

Partly cloudy

63° 💧 None 💨 3 mph H 96%29.97 inHg

5:00 PM

Sunny

74° 💧 None 💨 3 mph H 58%30.00 inHg

11:00 PM

Clear night

86° 💧 None 💨 7 mph H 41%29.88 inHg

Saturday

5:00 AM

Clear night

70° 💧 None 💨 1 mph H 73%29.97 inHg

11:00 AM

Sunny

65° 💧 None 💨 2 mph H 91%29.94 inHg

In Ontario and, more broadly, across the state of California: Clear skies are expected throughout the evening, with temperatures remaining quite warm, ranging from the mid-80s to low 90s. Winds will be moderate, coming from the northwest at speeds up to 14 mph, with gusts reaching 30 mph. No precipitation is anticipated during this time, so conditions will stay dry and clear. It will remain quite warm as the evening progresses, making for a warm night ahead. Residents should be prepared for the gusty winds, especially if planning outdoor activities. Overall, it will be a hot and breezy evening with no weather-related concerns.

15-Day Weather Outlook for Ontario

Sunday, Sep 13Sun Sep 13

Mostly sunny 92°/67° 💧 None 💨 10 mph

Monday, Sep 14Mon Sep 14

Sunny 93°/65° 💧 None 💨 10 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 91°/67° 💧 None 💨 11 mph

Wednesday, Sep 16Wed Sep 16

Sunny 90°/65° 💧 None 💨 10 mph

Thursday, Sep 17Thu Sep 17

Sunny 86°/65° 💧 None 💨 10 mph

Friday, Sep 18Fri Sep 18

Sunny 89°/65° 💧 None 💨 9 mph

Saturday, Sep 19Sat Sep 19

Sunny 89°/66° 💧 None 💨 8 mph

Sunday, Sep 20Sun Sep 20

Sunny 89°/65° 💧 None 💨 10 mph

Monday, Sep 21Mon Sep 21

Mostly cloudy 89°/66° 💧 None 💨 9 mph

Tuesday, Sep 22Tue Sep 22

Partly cloudy 88°/67° 💧 None 💨 10 mph

Wednesday, Sep 23Wed Sep 23

Mostly sunny 87°/68° 💧 None 💨 10 mph

Thursday, Sep 24Thu Sep 24

Light rain 83°/67° 💧 0.090 in 💨 6 mph

Friday, Sep 25Fri Sep 25

Mostly cloudy 75°/63° 💧 0.021 in 💨 8 mph

Saturday, Sep 26Sat Sep 26

Sunny 86°/65° 💧 0.001 in 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Ontario

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Ontario

Hourly forecast · Updated every 2 hours

Moderate

Nearest forecast value 7:00 PM

PM2.5 Fine particles Fair 20,4µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Fair 43,7µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Moderate 125,6µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,1µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Sensitive people should reduce strenuous and prolonged outdoor exertion.

UV & HEALTH

UV, Sun & Health Outlook in Ontario

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 9,3Very high 😐Moderate

Tomorrow UV 9,3Very high 😐Moderate

Sunday UV 9,2Very high 😐Moderate

Monday UV 8,9Very high 😐Moderate

Tuesday UV 8,0Very high 😐Moderate

Wednesday UV 8,0Very high —Unavailable

Thursday UV 8,0Very high —Unavailable

Hourly UV index today

7:00 PMUV 0,0

Today's weather health advice Open today's recommendations.

Very high UV risk

Use SPF 50+ sunscreen, a hat and sunglasses. Seek shade and limit exposure around midday.

Caution for sensitive people

People with respiratory or cardiovascular conditions should reduce prolonged outdoor exertion.

Stay hydrated

Drink water regularly, especially during physical activity or prolonged sun exposure.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

WIND OUTLOOK

Hourly Wind Forecast for Ontario

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ONTARIO, CALIFORNIA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

100/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 8:27 PM–5:07 AM

☁ Cloud cover 0% Real hourly forecast for the best viewing hour.

☾ Moonlight 0% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 82° high at the best hour.

✦ Estimated visible meteors 2–5/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min81%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

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Forecast data for Ontario were last refreshed today at 6:36 PM. The current forecast period extends through 13/09/2026 at 4:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.