Orange (CA) Temperature by Month
The average annual maximum temperature in Orange, California, United States of America is 25°C (77°F), with daytime highs ranging from 20°C (68°F) in December to 31°C (88°F) in September. This page covers monthly averages, day-night differences, and how Orange compares to cities worldwide.
Orange Monthly Temperatures
In Orange, seasonal changes bring about a moderate variation in temperatures. Nighttime lows range from 17°C (63°F) in September to 8°C (46°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Orange by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. September, the city's warmest month, sees 290 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Orange 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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Orange vs World: Temperature Compared
Orange'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:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
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 Orange's weather — including monthly rainfall, sunshine hours, and humidity — visit our Orange climate page.
