Ontario
California, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Ontario, CA

A clear street near the luxurious residential estate in Ontario, California, with a scenic background of a hilly landscape, the clear blue sky
A clear street near the luxurious residential estate in Ontario, California, with a scenic background of a hilly landscape, the clear blue sky
August, the last month of the summer, in Ontario, is also a hot month, with average temperature fluctuating between 93.6°F (34.2°C) and 64.8°F (18.2°C).

Temperature

August is the warmest month, with an average high-temperature of 93.6°F (34.2°C) and an average low-temperature of 64.8°F (18.2°C).

Rainfall

During August, Ontario regularly aggregates up to 0.1" (3.3mm) of precipitation. Throughout the year, 15" (382mm) of rain is accumulated.

Daylight

The average length of the day in August in Ontario is 13.4h.

What is the warmest month in Ontario?

August is the warmest month, with an average high-temperature of 93.6°F (34.2°C) and an average low-temperature of 64.8°F (18.2°C).

What is the temperature in August in Ontario?

The average high-temperature, in August, in Ontario, is 93.6°F (34.2°C), while the average low-temperature is 64.8°F (18.2°C).

How much does it rain in Ontario in August?

Throughout August, in Ontario, California, 0.1" (3.3mm) of precipitation is accumulated.

How many hours of daylight does Ontario have in August?

In Ontario, California, the average length of the day in August is 13.4h.
Average temperature in August - Ontario, CA
  • Average high temperature in August: 93.6°F

The warmest month (with the highest average high temperature) is August (93.6°F).
The month with the lowest average high temperature is January (65.2°F).

  • Average low temperature in August: 64.7°F

The month with the highest average low temperature is August (64.7°F).
The coldest month (with the lowest average low temperature) is December (42.7°F).

Average rainfall in August - Ontario, CA
  • Average rainfall in August: 0.1"

The wettest month (with the highest rainfall) is February (3.4").
Driest months (with the lowest rainfall) are June, July and August (0.1").

Average daylight in August - Ontario, CA
  • Average daylight in August: 13.4h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).