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 Ottawa Weather Forecast Summary |
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Today
Aug 15th
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Sunday
Aug 16th
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Monday
Aug 17th
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Tuesday
Aug 18th
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Wednesday
Aug 19th
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Thundershowers |
Mix of Sun and Cloud |
Mostly Sunny |
Mostly Sunny |
Mostly Cloudy with Showers |
81°F
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83°F
70°F |
81°F
65°F |
82°F
65°F |
77°F
63°F |
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| Ottawa Detailed Weather Forecast |
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| Saturday, August 15th, 2026 |
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Overnight |
Temperature: 71°F |
| Mostly cloudy with a chance of showers. |
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Morning |
Temperature: 71°F |
| Mostly cloudy with showers likely. |
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Afternoon |
Temperature: 79°F |
| A mix of cloud and sun with a chance of showers or thundershowers. |
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Evening |
Temperature: 77°F |
| Clear. Chance of a thunderstorm. |
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| Sunday, August 16th, 2026 |
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Overnight |
Temperature: 72°F |
| Cloudy with clear periods with a slight chance of showers or thundershowers. |
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Morning |
Temperature: 75°F |
| A mix of cloud and sun with a chance of showers or thundershowers. |
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Afternoon |
Temperature: 83°F |
| Sunny with cloudy periods. Chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 74°F |
| Clear. Chance of a thunderstorm. |
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| Monday, August 17th, 2026 |
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Overnight |
Temperature: 66°F |
| Clear. |
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Morning |
Temperature: 71°F |
| Sunny. |
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Afternoon |
Temperature: 81°F |
| Mostly sunny. |
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Evening |
Temperature: 72°F |
| Clear. Chance of a thunderstorm. |
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| Tuesday, August 18th, 2026 |
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Overnight |
Temperature: 66°F |
| Clear. |
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Morning |
Temperature: 69°F |
| Mostly sunny. |
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Afternoon |
Temperature: 81°F |
| Sunny with cloudy periods. Chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 75°F |
| Mostly cloudy with a chance of showers or thundershowers. |
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| Wednesday, August 19th, 2026 |
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Overnight |
Temperature: 65°F |
| Mostly clear with a few showers. |
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Morning |
Temperature: 69°F |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 76°F |
| Sunny with cloudy periods. |
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Evening |
Temperature: 67°F |
| Mostly clear. |
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| Thursday, August 20th, 2026 |
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Overnight |
Temperature: 60°F |
| Mostly clear. |
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Morning |
Temperature: 64°F |
| Mostly sunny. |
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Afternoon |
Temperature: 75°F |
| A mix of cloud and sun. |
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Evening |
Temperature: 68°F |
| Cloudy. |
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| Friday, August 21st, 2026 |
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Overnight |
Temperature: 62°F |
| Cloudy with a chance of showers. Windy. |
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Morning |
Temperature: 62°F |
| Cloudy with a chance of showers. Windy at times. |
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Afternoon |
Temperature: 64°F |
| Cloudy with a few showers. Windy at times. |
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Evening |
Temperature: 63°F |
| A mix of clear and cloudy skies with showers likely. Windy at times. |
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| Saturday, August 22nd, 2026 |
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Overnight |
Temperature: 60°F |
| Clear with cloudy periods. Windy at times. |
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Morning |
Temperature: 64°F |
| Mostly sunny. |
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Afternoon |
Temperature: 76°F |
| Sunny. |
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Evening |
Temperature: 71°F |
| Mostly clear with a chance of showers or thundershowers. |
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