May 21 - custom location - Weather History and Averages

High Temperatures

On May 21 in this location the average high temperature is 67.7 °F (19.8 °C). The lowest recored high temperature was 46.9 °F (8.3 °C) in 2025 and the highest recored high temperature was 87.1 °F (30.6 °C) in 2021. The high temperature is usually* between 61.3 °F (16.3 °C) and 74.2 °F (23.4 °C). About a quarter of the time, the high temperature is less than 61.3 °F (16.3 °C), and another quarter of the time, the high temperature is greater than and 74.2 °F (23.4 °C). About 95% of the time, the high temperature has been between 48.9 °F (9.4 °C) and 86.5 °F (30.3 °C).

Low Temperatures

On May 21 in this location the average low temperature is 49.9 °F (9.9 °C). The lowest recored low temperature was 28.4 °F (-2.0 °C) in 2002 and the lowest recored low temperature was 68.0 °F (20.0 °C) in 2021. The low temperature is usually* between 45.0 °F (7.2 °C) and 54.8 °F (12.7 °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 54.8 °F (12.7 °C). About 95% of the time, the low temperature has been between 35.6 °F (2.0 °C) and 64.1 °F (17.8 °C).

Frost

On May 21 in this location expect the temperatures to drop below freezing for a risk of frost about 0.7% 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: