September 21 - custom location - Weather History and Averages

High Temperatures

On September 21 in this location the average high temperature is 74.8 °F (23.8 °C). The lowest recored high temperature was 57.0 °F (13.9 °C) in 1982 and the highest recored high temperature was 93.0 °F (33.9 °C) in 2017. The high temperature is usually* between 69.2 °F (20.6 °C) and 80.5 °F (27.0 °C). About a quarter of the time, the high temperature is less than 69.2 °F (20.6 °C), and another quarter of the time, the high temperature is greater than and 80.5 °F (27.0 °C). About 95% of the time, the high temperature has been between 58.4 °F (14.6 °C) and 91.3 °F (33.0 °C).

Low Temperatures

On September 21 in this location the average low temperature is 54.1 °F (12.3 °C). The lowest recored low temperature was 30.0 °F (-1.1 °C) in 1962 and the lowest recored low temperature was 71.6 °F (22.0 °C) in 2018. The low temperature is usually* between 48.5 °F (9.2 °C) and 59.7 °F (15.4 °C). About a quarter of the time, the low temperature is less than 48.5 °F (9.2 °C), and another quarter of the time, the low temperature is greater than and 59.7 °F (15.4 °C). About 95% of the time, the low temperature has been between 37.9 °F (3.3 °C) and 70.3 °F (21.3 °C).

Frost

On September 21 in this location expect the temperatures to drop below freezing for a risk of frost about 0.4% 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: