Over the last 15 years, temperatures on Sept. 18 have ranged from a high of 85.8°F in 2019 and 2024 to a low of 52.3°F in 2014, according to Open-Meteo.
Over the last 15 years, temperatures on Sept. 15 have ranged from a high of 87.6°F in 2019 and 2024 to a low of 50.3°F in 2013, according to Open-Meteo.