Downey (CA) Temperature by Month
Downey, California, United States of America has an average annual maximum temperature of 25°C (77°F), with moderate seasonal shifts ranging from 20°C (68°F) in December to 30°C (86°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Downey Monthly Temperatures
The climate in Downey experiences moderate temperature changes, with mild shifts between seasons. At night, temperatures range from 18°C (64°F) in August to 8°C (46°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Downey by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. August, the city's warmest month, sees 347 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Downey vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Downey vs World: Temperature Compared
Downey's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:
Seville, Spain averages 23°C (73°F) a year — one of the warmer cities in Western Europe, with long hot summers.
Queenstown, New Zealand averages 10°C (50°F) annually — remember seasons are flipped, so its coldest months fall in June and July.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Downey?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Downey, December is the coolest month, with average highs of 20°C (68°F) and humidity around 52% — considered moderate. In August, the warmest month, temperatures average 30°C (86°F) with 71% humidity — conditions that feel high. For a full picture, see our humidity page.
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.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Downey's weather — including monthly rainfall, sunshine hours, and humidity — visit our Downey climate page.
