Nepean, Ontario, Canada climate
Average temperatures, precipitation and all-time records for Nepean, Ontario, Canada, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is July, averaging a high of 27°C, and its coldest is January, with an average low of -14°C.
Nepean is an area of Ottawa, Ontario, Canada. Located west of Ottawa's inner core, it was an independent city until amalgamated with the Regional Municipality of Ottawa–Carleton in 2001 to become the new city of Ottawa. However, the name Nepean continues in common usage in reference to the area. via Wikipedia
How today compares
Latest recorded day: 2026-09-08. Each reading placed on Nepean, Ontario, Canada's own ±7-day seasonal distribution.
Nepean average temperatures by month
Typical daily high and low, and average precipitation, for each month in Nepean, Ontario, Canada, based on 1980–2026 records. The wettest month is January (3 mm on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | -5°C | -14°C | 3 mm |
| February | -2°C | -12°C | 3 mm |
| March | 3°C | -6°C | 3 mm |
| April | 12°C | 2°C | 3 mm |
| May | 19°C | 8°C | 3 mm |
| June | 24°C | 13°C | 3 mm |
| July | 27°C | 16°C | 3 mm |
| August | 26°C | 15°C | 3 mm |
| September | 21°C | 11°C | 3 mm |
| October | 14°C | 5°C | 3 mm |
| November | 6°C | -2°C | 3 mm |
| December | -2°C | -9°C | 3 mm |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -23°C to 46°C scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 38°C on 2011-07-21
- Coldest day on record: -36°C on 1981-01-03
Percentiles compare each day to Nepean, Ontario, Canada's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →