Historical weather in Ottawa, Canada
Ottawa weather history for 2023-2025, with daily temperatures, precipitation, monthly summaries, and records from Open-Meteo archive data.
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Weather summary
Across 2023-2025, Ottawa averaged 12.3 C for daily highs and 3.4 C for daily lows across 1096 daily observations.
The warmest month was July 2025, with an average high of 27.4 C, while February 2025 had the lowest average low at -14.6 C.
The wettest month was August 2024, totaling 231.8 mm of precipitation.
The hottest day reached 34.5 C on July 28, 2025; the coldest night fell to -32.1 C on February 4, 2023.
Monthly summary table
| Year | Month | Avg low C | Avg high C | Rain and snow mm | Days |
|---|---|---|---|---|---|
| 2023 | January | -9.0 | -1.9 | 108.4 | 31 |
| 2023 | February | -12.1 | -1.7 | 79.6 | 28 |
| 2023 | March | -5.3 | 2.8 | 78.4 | 31 |
| 2023 | April | 0.5 | 12.7 | 100.8 | 30 |
| 2023 | May | 6.1 | 18.9 | 76.3 | 31 |
| 2023 | June | 13.5 | 24.4 | 89.5 | 30 |
| 2023 | July | 17.7 | 26.3 | 188.8 | 31 |
| 2023 | August | 15.1 | 23.5 | 135.2 | 31 |
| 2023 | September | 13.4 | 23.0 | 22.2 | 30 |
| 2023 | October | 8.2 | 15.5 | 94.9 | 31 |
| 2023 | November | -2.3 | 4.8 | 41.7 | 30 |
| 2023 | December | -4.4 | 1.3 | 104.0 | 31 |
| 2024 | January | -10.2 | -2.2 | 78.4 | 31 |
| 2024 | February | -10.1 | 1.3 | 28.8 | 29 |
| 2024 | March | -3.0 | 7.3 | 43.6 | 31 |
| 2024 | April | 1.8 | 11.8 | 131.1 | 30 |
| 2024 | May | 10.5 | 20.6 | 111.4 | 31 |
| 2024 | June | 14.7 | 23.8 | 181.4 | 30 |
| 2024 | July | 17.9 | 26.5 | 129.7 | 31 |
| 2024 | August | 16.2 | 24.5 | 231.8 | 31 |
| 2024 | September | 13.2 | 22.8 | 64.1 | 30 |
| 2024 | October | 6.5 | 15.0 | 40.0 | 31 |
| 2024 | November | 1.7 | 7.7 | 66.1 | 30 |
| 2024 | December | -8.3 | -2.2 | 95.1 | 31 |
| 2025 | January | -13.1 | -5.7 | 40.3 | 31 |
| 2025 | February | -14.6 | -5.5 | 73.7 | 28 |
| 2025 | March | -6.6 | 3.6 | 101.3 | 31 |
| 2025 | April | -0.2 | 10.7 | 95.9 | 30 |
| 2025 | May | 8.3 | 17.7 | 80.6 | 31 |
| 2025 | June | 15.0 | 24.7 | 78.5 | 30 |
| 2025 | July | 18.1 | 27.4 | 126.1 | 31 |
| 2025 | August | 16.4 | 26.3 | 50.2 | 31 |
| 2025 | September | 12.1 | 21.4 | 30.9 | 30 |
| 2025 | October | 6.3 | 15.2 | 87.9 | 31 |
| 2025 | November | -1.4 | 3.2 | 72.9 | 30 |
| 2025 | December | -13.1 | -3.7 | 70.1 | 31 |
Daily weather records
| Record | Date | Value |
|---|---|---|
| Hottest day | July 28, 2025 | 34.5 C |
| Coldest night | February 4, 2023 | -32.1 C |
| Wettest day | August 9, 2024 | 122.8 mm |
Related pages
Weather data source: Open-Meteo Archive API. City metadata source: GeoNames cities15000.