September 21 - custom location - Weather History and Averages

High Temperatures

On September 21 in this location the average high temperature is 73.1 °F (22.8 °C). The lowest recored high temperature was 55.0 °F (12.8 °C) in 1981 and the highest recored high temperature was 90.5 °F (32.5 °C) in 2017. The high temperature is usually* between 68.1 °F (20.1 °C) and 78.0 °F (25.6 °C). About a quarter of the time, the high temperature is less than 68.1 °F (20.1 °C), and another quarter of the time, the high temperature is greater than and 78.0 °F (25.6 °C). About 95% of the time, the high temperature has been between 58.6 °F (14.8 °C) and 87.5 °F (30.8 °C).

Low Temperatures

On September 21 in this location the average low temperature is 53.9 °F (12.2 °C). The lowest recored low temperature was 31.3 °F (-0.4 °C) in 1968 and the lowest recored low temperature was 72.0 °F (22.2 °C) in 1965. The low temperature is usually* between 49.4 °F (9.7 °C) and 58.4 °F (14.7 °C). About a quarter of the time, the low temperature is less than 49.4 °F (9.7 °C), and another quarter of the time, the low temperature is greater than and 58.4 °F (14.7 °C). About 95% of the time, the low temperature has been between 40.8 °F (4.9 °C) and 67.0 °F (19.4 °C).

Frost

On September 21 in this location expect the temperatures to drop below freezing for a risk of frost about 0.1% 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: