September 21 - custom location - Weather History and Averages

High Temperatures

On September 21 in this location the average high temperature is 73.0 °F (22.8 °C). The lowest recored high temperature was 23.0 °F (-5.0 °C) in 2004 and the highest recored high temperature was 91.4 °F (33.0 °C) in 2010. The high temperature is usually* between 67.7 °F (19.8 °C) and 78.3 °F (25.7 °C). About a quarter of the time, the high temperature is less than 67.7 °F (19.8 °C), and another quarter of the time, the high temperature is greater than and 78.3 °F (25.7 °C). About 95% of the time, the high temperature has been between 57.6 °F (14.2 °C) and 88.4 °F (31.3 °C).

Low Temperatures

On September 21 in this location the average low temperature is 56.9 °F (13.8 °C). The lowest recored low temperature was 10.9 °F (-11.7 °C) in 2004 and the lowest recored low temperature was 72.3 °F (22.4 °C) in 2016. The low temperature is usually* between 51.6 °F (10.9 °C) and 62.1 °F (16.7 °C). About a quarter of the time, the low temperature is less than 51.6 °F (10.9 °C), and another quarter of the time, the low temperature is greater than and 62.1 °F (16.7 °C). About 95% of the time, the low temperature has been between 41.5 °F (5.3 °C) and 72.2 °F (22.3 °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: