September 21 - custom location - Weather History and Averages

High Temperatures

On September 21 in this location the average high temperature is 72.9 °F (22.7 °C). The lowest recored high temperature was 55.4 °F (13.0 °C) in 2000 and the highest recored high temperature was 91.0 °F (32.8 °C) in 2017. The high temperature is usually* between 66.6 °F (19.2 °C) and 79.2 °F (26.2 °C). About a quarter of the time, the high temperature is less than 66.6 °F (19.2 °C), and another quarter of the time, the high temperature is greater than and 79.2 °F (26.2 °C). About 95% of the time, the high temperature has been between 54.6 °F (12.6 °C) and 91.2 °F (32.9 °C).

Low Temperatures

On September 21 in this location the average low temperature is 53.5 °F (11.9 °C). The lowest recored low temperature was 34.0 °F (1.1 °C) in 1991 and the lowest recored low temperature was 69.1 °F (20.6 °C) in 1980. The low temperature is usually* between 48.3 °F (9.1 °C) and 58.6 °F (14.8 °C). About a quarter of the time, the low temperature is less than 48.3 °F (9.1 °C), and another quarter of the time, the low temperature is greater than and 58.6 °F (14.8 °C). About 95% of the time, the low temperature has been between 38.5 °F (3.6 °C) and 68.4 °F (20.2 °C).

Frost

On September 21 in this location expect the temperatures to drop below freezing for a risk of frost about 0.3% 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: