May 21 - custom location - Weather History and Averages

High Temperatures

On May 21 in this location the average high temperature is 73.0 °F (22.8 °C). The lowest recored high temperature was 48.4 °F (9.1 °C) in 2025 and the highest recored high temperature was 92.8 °F (33.8 °C) in 1977. The high temperature is usually* between 66.7 °F (19.3 °C) and 79.3 °F (26.3 °C). About a quarter of the time, the high temperature is less than 66.7 °F (19.3 °C), and another quarter of the time, the high temperature is greater than and 79.3 °F (26.3 °C). About 95% of the time, the high temperature has been between 54.6 °F (12.5 °C) and 91.4 °F (33.0 °C).

Low Temperatures

On May 21 in this location the average low temperature is 50.3 °F (10.2 °C). The lowest recored low temperature was 28.9 °F (-1.7 °C) in 2002 and the lowest recored low temperature was 66.9 °F (19.4 °C) in 1970. The low temperature is usually* between 45.0 °F (7.2 °C) and 55.6 °F (13.1 °C). About a quarter of the time, the low temperature is less than 45.0 °F (7.2 °C), and another quarter of the time, the low temperature is greater than and 55.6 °F (13.1 °C). About 95% of the time, the low temperature has been between 35.0 °F (1.7 °C) and 65.6 °F (18.7 °C).

Frost

On May 21 in this location expect the temperatures to drop below freezing for a risk of frost about 1.0% 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: