May - Ontario International Airport - Weather History and Averages

An Integrated Surface Dataset (ISD) station ID was found for this station. Newer data may be available at the ISD page.

^{This site or product includes IATA/ICAO List data available from https://github.com/ip2location/ip2location-iata-icao.}

High Temperatures

On average, the day in May with the warmest high temperature in Ontario International Airport is May 29 at an average of 81.0 °F (27.2 °C).

On average, the day in May with the coldest high temperature in Ontario International Airport is May 1 at an average of 76.7 °F (24.8 °C).

The warmest recorded high temperature in May in Ontario International Airport was 107.1 °F (41.7 °C) on May 29 in the year 1984 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

The coldest recorded high temperature in May in Ontario International Airport was 55.0 °F (12.8 °C) on May 2 in the year 1955 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

On average, the day in May with the warmest low temperature in Ontario International Airport is May 29 at an average of 56.2 °F (13.4 °C).

On average, the day in May with the coldest low temperature in Ontario International Airport is May 1 at an average of 52.8 °F (11.6 °C).

The warmest recorded low temperature in Ontario International Airport was 80.1 °F (26.7 °C) on May 19 in the year 1980 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

The coldest recorded low temperature in Ontario International Airport was 37.0 °F (2.8 °C) on May 3 in the year 1955 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

If you would like to see the temperatures for specific days, you can click on the corresponding links below: