August - 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 August with the warmest high temperature in Ontario International Airport is August 28 at an average of 94.8 °F (34.9 °C).

On average, the day in August with the coldest high temperature in Ontario International Airport is August 18 at an average of 90.9 °F (32.7 °C).

The warmest recorded high temperature in August in Ontario International Airport was 115.0 °F (46.1 °C) on August 9 in the year 1974 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

The coldest recorded high temperature in August in Ontario International Airport was 72.0 °F (22.2 °C) on August 19 in the year 1983 at ONTARIO — Integrated Surface Dataset (ISD) station ID: 722865 — Weather Bureau Army Navy (WBAN): 93180 .

On average, the day in August with the warmest low temperature in Ontario International Airport is August 6 at an average of 64.5 °F (18.1 °C).

On average, the day in August with the coldest low temperature in Ontario International Airport is August 23 at an average of 62.6 °F (17.0 °C).

The warmest recorded low temperature in Ontario International Airport was 81.0 °F (27.2 °C) on August 23 in the year 1987 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 49.3 °F (9.6 °C) on August 3 in the year 1944 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: