7-Day Forecast Summary
7-Day Detailed Weather Forecast for Ontario
Overnight |
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Temperature: 63°F Wind Speed: 10 mph Wind Direction: SW Forecast: Mostly cloudy, with a low around 63. Southwest wind around 10 mph. New rainfall amounts less than a tenth of an inch possible. |
Sunday |
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Temperature: 76°F Wind Speed: 10 to 14 mph Wind Direction: W Forecast: A chance of showers and thunderstorms between 7am and 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and thunderstorms. Cloudy. High near 76, with temperatures falling to around 65 in the afternoon. West wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible. |
Sunday Night |
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Temperature: 50°F Wind Speed: 8 to 12 mph Wind Direction: NW Forecast: A slight chance of rain showers before 7pm. Partly cloudy, with a low around 50. Northwest wind 8 to 12 mph, with gusts as high as 23 mph. Chance of precipitation is 20%. New rainfall amounts between a quarter and half of an inch possible. |
Monday |
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Temperature: 67°F Wind Speed: 8 mph Wind Direction: NW Forecast: Sunny, with a high near 67. Northwest wind around 8 mph. |
Monday Night |
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Temperature: 53°F Wind Speed: 5 to 8 mph Wind Direction: SW Forecast: Mostly clear, with a low around 53. Southwest wind 5 to 8 mph. |
Tuesday |
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Temperature: 73°F Wind Speed: 8 to 13 mph Wind Direction: SW Forecast: A slight chance of rain showers between 2pm and 5pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 73. Chance of precipitation is 20%. |
Tuesday Night |
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Temperature: 56°F Wind Speed: 12 mph Wind Direction: SW Forecast: A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 50%. |
Wednesday |
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Temperature: 73°F Wind Speed: 13 mph Wind Direction: SW Forecast: A chance of rain showers before 8am, then a chance of showers and thunderstorms. Partly sunny, with a high near 73. Chance of precipitation is 40%. |
Wednesday Night |
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Temperature: 62°F Wind Speed: 9 to 24 mph Wind Direction: S Forecast: Showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 80%. |
Thursday |
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Temperature: 78°F Wind Speed: 21 to 24 mph Wind Direction: SW Forecast: Showers and thunderstorms. Mostly cloudy, with a high near 78. Chance of precipitation is 80%. |
Thursday Night |
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Temperature: 57°F Wind Speed: 7 to 20 mph Wind Direction: W Forecast: Showers and thunderstorms likely before 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%. |
Juneteenth |
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Temperature: 75°F Wind Speed: 8 to 13 mph Wind Direction: W Forecast: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 75. |
Friday Night |
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Temperature: 56°F Wind Speed: 7 to 10 mph Wind Direction: W Forecast: A slight chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 56. |
Saturday |
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Temperature: 77°F Wind Speed: 7 to 14 mph Wind Direction: W Forecast: A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 77. |

