West Covina (CA) Temperature by Month

The average annual maximum temperature in West Covina, California, United States of America is 28°C (82°F), with daytime highs ranging from 20°C (68°F) in December to 35°C (95°F) in August. This page covers monthly averages, day-night differences, and how West Covina compares to cities worldwide.

Depending on the time of the year, temperatures range from very hot to pleasant in West Covina. At night, minimum temperatures range from 17°C (63°F) in August to 8°C (46°F) in December.

The chart below illustrates the average maximum day and minimum night temperatures in West Covina by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. August, the city's warmest month, averages 351 hours of sunshine.

The chart below shows the average temperature throughout the year:

West Covina's average annual maximum temperature is 28°C (82°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Beijing, China averages 20°C (68°F) annually, but with big seasonal swings, very cold winters and hot summers.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.

Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.

For more on West Covina's weather, including monthly rainfall, sunshine hours, and humidity, visit our West Covina climate page.