September 21 - custom location - Weather History and Averages

High Temperatures

On September 21 in this location the average high temperature is 69.8 °F (21.0 °C). The lowest recored high temperature was 52.0 °F (11.1 °C) in 1983 and the highest recored high temperature was 88.0 °F (31.1 °C) in 2017. The high temperature is usually* between 64.4 °F (18.0 °C) and 75.2 °F (24.0 °C). About a quarter of the time, the high temperature is less than 64.4 °F (18.0 °C), and another quarter of the time, the high temperature is greater than and 75.2 °F (24.0 °C). About 95% of the time, the high temperature has been between 54.1 °F (12.3 °C) and 85.5 °F (29.7 °C).

Low Temperatures

On September 21 in this location the average low temperature is 52.8 °F (11.6 °C). The lowest recored low temperature was 33.1 °F (0.6 °C) in 1962 and the lowest recored low temperature was 73.0 °F (22.8 °C) in 1970. The low temperature is usually* between 47.7 °F (8.7 °C) and 57.9 °F (14.4 °C). About a quarter of the time, the low temperature is less than 47.7 °F (8.7 °C), and another quarter of the time, the low temperature is greater than and 57.9 °F (14.4 °C). About 95% of the time, the low temperature has been between 38.1 °F (3.4 °C) and 67.5 °F (19.7 °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: