September 21 - custom location - Weather History and Averages

High Temperatures

On September 21 in this location the average high temperature is 78.5 °F (25.8 °C). The lowest recored high temperature was 63.3 °F (17.4 °C) in 2010 and the highest recored high temperature was 104.0 °F (40.0 °C) in 2015. The high temperature is usually* between 74.6 °F (23.7 °C) and 82.4 °F (28.0 °C). About a quarter of the time, the high temperature is less than 74.6 °F (23.7 °C), and another quarter of the time, the high temperature is greater than and 82.4 °F (28.0 °C). About 95% of the time, the high temperature has been between 67.1 °F (19.5 °C) and 89.9 °F (32.2 °C).

Low Temperatures

On September 21 in this location the average low temperature is 61.7 °F (16.5 °C). The lowest recored low temperature was 50.0 °F (10.0 °C) in 1965 and the lowest recored low temperature was 73.9 °F (23.3 °C) in 1983. The low temperature is usually* between 59.3 °F (15.2 °C) and 64.1 °F (17.8 °C). About a quarter of the time, the low temperature is less than 59.3 °F (15.2 °C), and another quarter of the time, the low temperature is greater than and 64.1 °F (17.8 °C). About 95% of the time, the low temperature has been between 54.7 °F (12.6 °C) and 68.7 °F (20.4 °C).

Frost

On September 21 in this location expect the temperatures to drop below freezing for a risk of frost about 0.0% 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: