What is the weather in Ontario right now?

Current weather in Ontario is overcast clouds.

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 · 7:39 AM

Ontario Weather & Hourly Forecast

United States · California · 91761

80°F

Overcast

Feels like: 80°F

💧 Humidity 65% 🌡 Pressure 29.88 inHg 💨 Wind 4 mph 👁 Visibility 6.2 mi ☁ Clouds 97% ☀️ UV index 5.0 · Moderate 🌅 Sunrise 6:21 AM 🌇 Sunset 7:22 PM

Hourly Forecast for Ontario

Today

8:00 AM

Overcast

80° 💧 None 💨 4 mph H 65%29.88 inHg

11:00 AM

Overcast

88° 💧 None 💨 5 mph H 51%29.88 inHg

2:00 PM

Overcast

96° 💧 None 💨 12 mph H 25%29.83 inHg

5:00 PM

Mostly cloudy

96° 💧 None 💨 13 mph H 30%29.80 inHg

8:00 PM

Clear night

83° 💧 None 💨 8 mph H 41%29.85 inHg

11:00 PM

Clear night

78° 💧 None 💨 5 mph H 44%29.85 inHg

Tomorrow

2:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 49%29.85 inHg

5:00 AM

Overcast night

75° 💧 None 💨 5 mph H 52%29.85 inHg

8:00 AM

Mostly cloudy

80° 💧 None 💨 2 mph H 48%29.88 inHg

11:00 AM

Mostly cloudy

94° 💧 None 💨 6 mph H 33%29.88 inHg

2:00 PM

Partly cloudy

94° 💧 None 💨 11 mph H 25%29.83 inHg

5:00 PM

Mostly sunny

95° 💧 None 💨 12 mph H 28%29.77 inHg

8:00 PM

Mostly clear night

80° 💧 None 💨 9 mph H 38%29.80 inHg

11:00 PM

Mostly clear night

75° 💧 None 💨 5 mph H 42%29.83 inHg

Sunday

2:00 AM

Clear night

82° 💧 None 💨 4 mph H 48%29.83 inHg

5:00 AM

Clear night

80° 💧 None 💨 3 mph H 52%29.83 inHg

Today

8:00 AM

Overcast

80° 💧 None 💨 4 mph H 65%29.88 inHg

9:00 AM

Overcast

80° 💧 None 💨 4 mph H 63%29.88 inHg

10:00 AM

Overcast

83° 💧 None 💨 4 mph H 58%29.88 inHg

11:00 AM

Overcast

88° 💧 None 💨 5 mph H 51%29.88 inHg

12:00 PM

Overcast

92° 💧 None 💨 7 mph H 42%29.85 inHg

1:00 PM

Overcast

96° 💧 None 💨 10 mph H 26%29.85 inHg

2:00 PM

Overcast

96° 💧 None 💨 12 mph H 25%29.83 inHg

3:00 PM

Mostly cloudy

98° 💧 None 💨 13 mph H 25%29.83 inHg

4:00 PM

Mostly cloudy

98° 💧 None 💨 13 mph H 27%29.80 inHg

5:00 PM

Mostly cloudy

96° 💧 None 💨 13 mph H 30%29.80 inHg

6:00 PM

Sunny

91° 💧 None 💨 12 mph H 34%29.83 inHg

7:00 PM

Sunny

86° 💧 None 💨 10 mph H 38%29.83 inHg

8:00 PM

Clear night

83° 💧 None 💨 8 mph H 41%29.85 inHg

9:00 PM

Clear night

81° 💧 None 💨 6 mph H 42%29.85 inHg

10:00 PM

Clear night

81° 💧 None 💨 6 mph H 42%29.85 inHg

11:00 PM

Clear night

78° 💧 None 💨 5 mph H 44%29.85 inHg

Tomorrow

12:00 AM

Mostly clear night

77° 💧 None 💨 5 mph H 45%29.88 inHg

1:00 AM

Mostly cloudy night

77° 💧 None 💨 5 mph H 48%29.88 inHg

2:00 AM

Mostly cloudy night

76° 💧 None 💨 2 mph H 49%29.85 inHg

3:00 AM

Mostly cloudy night

77° 💧 None 💨 2 mph H 49%29.85 inHg

4:00 AM

Mostly cloudy night

76° 💧 None 💨 4 mph H 50%29.85 inHg

5:00 AM

Overcast night

75° 💧 None 💨 5 mph H 52%29.85 inHg

6:00 AM

Overcast night

75° 💧 None 💨 4 mph H 54%29.88 inHg

7:00 AM

Mostly cloudy

76° 💧 None 💨 1 mph H 54%29.88 inHg

8:00 AM

Mostly cloudy

80° 💧 None 💨 2 mph H 48%29.88 inHg

9:00 AM

Mostly cloudy

85° 💧 None 💨 2 mph H 42%29.88 inHg

10:00 AM

Mostly cloudy

89° 💧 None 💨 4 mph H 37%29.88 inHg

11:00 AM

Mostly cloudy

94° 💧 None 💨 6 mph H 33%29.88 inHg

12:00 PM

Overcast

94° 💧 None 💨 8 mph H 30%29.85 inHg

1:00 PM

Mostly cloudy

94° 💧 None 💨 10 mph H 27%29.83 inHg

2:00 PM

Partly cloudy

94° 💧 None 💨 11 mph H 25%29.83 inHg

3:00 PM

Partly cloudy

96° 💧 None 💨 13 mph H 25%29.80 inHg

4:00 PM

Partly cloudy

96° 💧 None 💨 12 mph H 26%29.80 inHg

5:00 PM

Mostly sunny

95° 💧 None 💨 12 mph H 28%29.77 inHg

6:00 PM

Partly cloudy

90° 💧 None 💨 12 mph H 31%29.80 inHg

7:00 PM

Partly cloudy

84° 💧 None 💨 11 mph H 35%29.80 inHg

8:00 PM

Mostly clear night

80° 💧 None 💨 9 mph H 38%29.80 inHg

9:00 PM

Mostly clear night

78° 💧 None 💨 7 mph H 40%29.83 inHg

10:00 PM

Mostly clear night

77° 💧 None 💨 6 mph H 42%29.85 inHg

11:00 PM

Mostly clear night

75° 💧 None 💨 5 mph H 42%29.83 inHg

Sunday

12:00 AM

Clear night

84° 💧 None 💨 5 mph H 43%29.83 inHg

1:00 AM

Clear night

83° 💧 None 💨 4 mph H 46%29.83 inHg

2:00 AM

Clear night

82° 💧 None 💨 4 mph H 48%29.83 inHg

3:00 AM

Clear night

81° 💧 None 💨 4 mph H 49%29.83 inHg

4:00 AM

Clear night

80° 💧 None 💨 3 mph H 51%29.83 inHg

5:00 AM

Clear night

80° 💧 None 💨 3 mph H 52%29.83 inHg

6:00 AM

Clear night

79° 💧 None 💨 3 mph H 53%29.85 inHg

7:00 AM

Sunny

79° 💧 None 💨 2 mph H 53%29.85 inHg

8:00 AM

Sunny

81° 💧 None 💨 1 mph H 49%29.88 inHg

9:00 AM

Partly cloudy

83° 💧 None 💨 2 mph H 44%29.85 inHg

10:00 AM

Partly cloudy

86° 💧 None 💨 3 mph H 38%29.88 inHg

11:00 AM

Partly cloudy

88° 💧 None 💨 4 mph H 34%29.85 inHg

12:00 PM

Overcast

91° 💧 None 💨 6 mph H 30%29.85 inHg

1:00 PM

Mostly cloudy

93° 💧 None 💨 9 mph H 26%29.83 inHg

2:00 PM

Partly cloudy

94° 💧 None 💨 11 mph H 23%29.83 inHg

3:00 PM

Partly cloudy

93° 💧 None 💨 14 mph H 21%29.80 inHg

4:00 PM

Partly cloudy

92° 💧 None 💨 13 mph H 22%29.80 inHg

5:00 PM

Mostly sunny

90° 💧 None 💨 13 mph H 23%29.80 inHg

6:00 PM

Sunny

87° 💧 None 💨 12 mph H 28%29.80 inHg

7:00 PM

Sunny

83° 💧 None 💨 10 mph H 33%29.83 inHg

8:00 PM

Clear night

81° 💧 None 💨 9 mph H 36%29.83 inHg

9:00 PM

Clear night

80° 💧 None 💨 8 mph H 39%29.85 inHg

10:00 PM

Clear night

79° 💧 None 💨 6 mph H 40%29.85 inHg

11:00 PM

Clear night

78° 💧 None 💨 5 mph H 41%29.85 inHg

Monday

12:00 AM

Clear night

78° 💧 None 💨 4 mph H 43%29.85 inHg

1:00 AM

Clear night

77° 💧 None 💨 4 mph H 45%29.85 inHg

2:00 AM

Clear night

77° 💧 None 💨 3 mph H 46%29.85 inHg

3:00 AM

Clear night

76° 💧 None 💨 3 mph H 47%29.85 inHg

4:00 AM

Clear night

76° 💧 None 💨 3 mph H 49%29.85 inHg

5:00 AM

Clear night

75° 💧 None 💨 3 mph H 50%29.85 inHg

6:00 AM

Clear night

75° 💧 None 💨 3 mph H 51%29.85 inHg

7:00 AM

Sunny

74° 💧 None 💨 2 mph H 52%29.88 inHg

8:00 AM

Sunny

76° 💧 None 💨 1 mph H 48%29.88 inHg

9:00 AM

Sunny

79° 💧 None 💨 2 mph H 42%29.88 inHg

10:00 AM

Sunny

81° 💧 None 💨 3 mph H 36%29.88 inHg

11:00 AM

Sunny

84° 💧 None 💨 4 mph H 30%29.88 inHg

12:00 PM

Sunny

87° 💧 None 💨 5 mph H 24%29.88 inHg

1:00 PM

Sunny

89° 💧 None 💨 7 mph H 21%29.85 inHg

2:00 PM

Sunny

91° 💧 None 💨 10 mph H 19%29.85 inHg

3:00 PM

Sunny

91° 💧 None 💨 12 mph H 20%29.83 inHg

4:00 PM

Sunny

90° 💧 None 💨 13 mph H 21%29.83 inHg

5:00 PM

Sunny

87° 💧 None 💨 13 mph H 22%29.83 inHg

6:00 PM

Sunny

84° 💧 None 💨 12 mph H 25%29.83 inHg

7:00 PM

Sunny

81° 💧 None 💨 11 mph H 30%29.85 inHg

8:00 PM

Clear night

79° 💧 None 💨 9 mph H 36%29.85 inHg

9:00 PM

Clear night

78° 💧 None 💨 7 mph H 38%29.88 inHg

10:00 PM

Clear night

77° 💧 None 💨 5 mph H 39%29.88 inHg

11:00 PM

Clear night

77° 💧 None 💨 4 mph H 39%29.88 inHg

Tuesday

12:00 AM

Clear night

77° 💧 None 💨 4 mph H 39%29.88 inHg

1:00 AM

Clear night

76° 💧 None 💨 4 mph H 40%29.91 inHg

2:00 AM

Clear night

76° 💧 None 💨 4 mph H 41%29.88 inHg

3:00 AM

Clear night

75° 💧 None 💨 3 mph H 43%29.88 inHg

4:00 AM

Clear night

74° 💧 None 💨 4 mph H 44%29.88 inHg

5:00 AM

Clear night

74° 💧 None 💨 3 mph H 44%29.88 inHg

6:00 AM

Clear night

74° 💧 None 💨 2 mph H 45%29.91 inHg

7:00 AM

Sunny

74° 💧 None 💨 2 mph H 46%29.91 inHg

In Ontario and, more broadly, across the state of California: This morning will start with mostly cloudy skies and temperatures ranging from the mid-70s to low 80s. Winds from the northwest will be moderate, with speeds up to 16 mph and gusts reaching 23 mph. As the day progresses, the cloud cover will persist, but no rain is expected. Temperatures are likely to rise slightly, reaching into the low to mid-80s by afternoon. Winds will continue from the northwest, maintaining moderate speeds. Overall, it will be a mild to warm day with mostly cloudy conditions and steady breezes.

15-Day Weather Outlook for Ontario

TomorrowTomorrow

Overcast 96°/75° 💧 None 💨 13 mph

Sunday, Aug 30Sun Aug 30

Overcast 94°/78° 💧 None 💨 14 mph

Monday, Aug 31Mon Aug 31

Sunny 91°/74° 💧 None 💨 13 mph

Tuesday, Sep 1Tue Sep 1

Sunny 91°/74° 💧 None 💨 12 mph

Wednesday, Sep 2Wed Sep 2

Sunny 91°/75° 💧 None 💨 12 mph

Thursday, Sep 3Thu Sep 3

Sunny 91°/76° 💧 None 💨 13 mph

Friday, Sep 4Fri Sep 4

Sunny 88°/74° 💧 None 💨 12 mph

Saturday, Sep 5Sat Sep 5

Sunny 90°/73° 💧 None 💨 11 mph

Sunday, Sep 6Sun Sep 6

Partly cloudy 93°/78° 💧 None 💨 13 mph

Monday, Sep 7Mon Sep 7

Overcast 93°/78° 💧 None 💨 12 mph

Tuesday, Sep 8Tue Sep 8

Sunny 98°/81° 💧 None 💨 11 mph

Wednesday, Sep 9Wed Sep 9

Sunny 103°/85° 💧 None 💨 12 mph

Thursday, Sep 10Thu Sep 10

Sunny 105°/87° 💧 None 💨 11 mph

Friday, Sep 11Fri Sep 11

Sunny 99°/84° 💧 None 💨 12 mph

Saturday, Sep 12Sat Sep 12

Sunny 94°/79° 💧 None 💨 12 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 8:00 AM

PM2.5 Fine particles Moderate 32,2µg/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 43,8µg/m³

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

O₃ Ozone Fair 72,6µg/m³

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

NO₂ Nitrogen dioxide Good 1,3µg/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 9,0Very high 😐Moderate

Tomorrow UV 9,0Very high 😷Poor

Sunday UV 8,0Very high 😐Moderate

Monday UV 8,0Very high 😐Moderate

Tuesday UV 8,0Very high 🙂Fair

Wednesday UV 8,0Very high —Unavailable

Thursday UV 8,0Very high —Unavailable

Hourly UV index today

8:00 AMUV 6,0 9:00 AMUV 7,0 10:00 AMUV 7,0 11:00 AMUV 8,0 12:00 PMUV 8,0 1:00 PMUV 9,0 2:00 PMUV 9,0 3:00 PMUV 9,0 4:00 PMUV 9,0 5:00 PMUV 9,0 6:00 PMUV 8,0 7:00 PMUV 8,0

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

Internal PR simulation: 5.52 Population: 180,547

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 7:39 AM. The current forecast period extends through 30/08/2026 at 5:00 AM. 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.