Ottawa's average temperature over the last 30 years is around 7.2°C. Jul is typically the hottest month and Jan the coldest, with total annual rainfall averaging about 1037 mm.
| Year | Max Temp | Min Temp | Precipitation |
|---|---|---|---|
| 2025 | 35°C | -23°C | 908 mm |
| 2024 | 33°C | -21°C | 1202 mm |
| 2023 | 33°C | -32°C | 1120 mm |
| 2022 | 32°C | -30°C | 1201 mm |
| 2021 | 32°C | -24°C | 966 mm |
| 2020 | 36°C | -25°C | 1032 mm |
| 2019 | 34°C | -28°C | 1107 mm |
| 2018 | 34°C | -31°C | 1079 mm |
| 2017 | 31°C | -28°C | 1460 mm |
| 2016 | 34°C | -32°C | 1030 mm |
| 2015 | 32°C | -30°C | 917 mm |
| 2014 | 31°C | -29°C | 1039 mm |
| 2013 | 32°C | -29°C | 978 mm |
| 2012 | 34°C | -25°C | 918 mm |
| 2011 | 35°C | -32°C | 1066 mm |
| 2010 | 34°C | -24°C | 924 mm |
| 2009 | 32°C | -32°C | 945 mm |
| 2008 | 30°C | -24°C | 1203 mm |
| 2007 | 34°C | -27°C | 916 mm |
| 2006 | 35°C | -21°C | 1223 mm |
| 2005 | 33°C | -30°C | 919 mm |
| 2004 | 30°C | -33°C | 914 mm |
| 2003 | 33°C | -30°C | 1072 mm |
| 2002 | 34°C | -22°C | 931 mm |
| 2001 | 36°C | -23°C | 861 mm |
| 2000 | 28°C | -27°C | 1087 mm |
| 1999 | 33°C | -28°C | 983 mm |
| 1998 | 31°C | -28°C | 935 mm |
| 1997 | 33°C | -29°C | 991 mm |
| 1996 | 31°C | -29°C | 1155 mm |
| Month | Avg High | Avg Low | Rainfall |
|---|---|---|---|
| Jan | -5°C | -14°C | 70 mm |
| Feb | -3°C | -12°C | 61 mm |
| Mar | 3°C | -7°C | 72 mm |
| Apr | 11°C | 1°C | 93 mm |
| May | 19°C | 8°C | 87 mm |
| Jun | 23°C | 14°C | 107 mm |
| Jul | 26°C | 17°C | 101 mm |
| Aug | 25°C | 16°C | 96 mm |
| Sep | 21°C | 12°C | 91 mm |
| Oct | 13°C | 6°C | 95 mm |
| Nov | 6°C | -1°C | 78 mm |
| Dec | -1°C | -8°C | 86 mm |