July 7 - Low maximum dewpoint 8.8°C. Old record 10.0°C in 1953.
July 18 - High humidex 39.9. Old record 39.8 in 2004.
- Driest 12-month period since 1872 with 264.2 mm of precipitation from Aug 2020 to Jul 2021. Old record 275.3 mm from Sep 1885 to Aug 1886.
- 2nd driest January to July period with 148.7 mm. Driest was 140.9 mm in 1980. Also 4th least rainy January to July period with 116.8 mm of rain. Less rainy were 1980 (75.3 mm), 1925 (113.0 mm), 2006 (116.5 mm).
- Smokiest July on record since 1953 with 137 hours of smoke and 23 days with smoke reported at the Airport. Old records 9 days in 1989 and 79 hours in 2015. Also the month with the most smoke days (old record 17 days in Aug 2018 and Oct 1992) and the month with the 2nd most smoke hours (most was 163 hours in Aug 1961). -- Date notes: Hours are determined by the number of hours with 'Smoke' reported in hourly obs in EC archives. Days are determined by the number of days with a mention of smoke (FU or K) in metar/airway reports with a reduction in visibility)
- 21 months (Nov 2019 - Jul 2021) - Longest streak of dry months since 1872. Old record 11 months from Oct 2017 to Aug 2018.
- Maximum daily precipitation only 3.6 mm in July, the 2nd lowest since 1873. Lowest was 3.0 mm in 2011.
- Tied with 1923 for 2nd warmest June-July period with a mean temperature of 20.9°C. Warmest was 21.6°C in 1988. Also 2nd warmest for high temperatures with average of 28.5°C. Warmest was 28.9°C in 1988.