September 21 - custom location - Weather History and Averages

High Temperatures

On September 21 in this location the average high temperature is 74.7 °F (23.7 °C). The lowest recored high temperature was 60.8 °F (16.0 °C) in 1999 and the highest recored high temperature was 91.9 °F (33.3 °C) in 2024. The high temperature is usually* between 69.1 °F (20.6 °C) and 80.4 °F (26.9 °C). About a quarter of the time, the high temperature is less than 69.1 °F (20.6 °C), and another quarter of the time, the high temperature is greater than and 80.4 °F (26.9 °C). About 95% of the time, the high temperature has been between 58.4 °F (14.7 °C) and 91.0 °F (32.8 °C).

Low Temperatures

On September 21 in this location the average low temperature is 55.8 °F (13.2 °C). The lowest recored low temperature was 30.0 °F (-1.1 °C) in 1962 and the lowest recored low temperature was 72.3 °F (22.4 °C) in 2016. The low temperature is usually* between 50.2 °F (10.1 °C) and 61.4 °F (16.3 °C). About a quarter of the time, the low temperature is less than 50.2 °F (10.1 °C), and another quarter of the time, the low temperature is greater than and 61.4 °F (16.3 °C). About 95% of the time, the low temperature has been between 39.6 °F (4.2 °C) and 72.0 °F (22.2 °C).

Frost

On September 21 in this location expect the temperatures to drop below freezing for a risk of frost about 0.2% of the time.

Usually* in this context means around 50% of the time, assuming a normal distribution of values.

Data Source(s)

The data used to compute the average high/low temperatures for this location were taken from the following stations: