Nepean (pronounced "ne-PEE-yin") was a local municipality adjacent to Ottawa, Ontario, Canada until it was amalgamated with the 10 other municipalities that formed 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. Nepean is now the largest suburban area in Ottawa. The population of Nepean is about 150,000 people.
Nepean has fairly warm summers. The summer season goes from early June to early Sempember. The average tempratures for the summers are from 25 to about 32 degrees (78 to 92 degrees farenheight).