Newport Beach (CA) Temperature by Month
The average annual maximum temperature in Newport Beach, California, United States of America is 22°C (72°F), with little variation between seasons. This page covers monthly averages, day-night differences, and how Newport Beach compares to cities worldwide.
Newport Beach Monthly Temperatures
With minimal seasonal shifts, Newport Beach experiences a constant climate year-round. Maximum daytime temperatures range from a comfortable 25°C (77°F) in September to a pleasant 19°C (66°F) in December. At night, temperatures range from 18°C (64°F) in September to 9°C (48°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Newport Beach 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. September, the city's warmest month, averages 290 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Newport Beach 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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Newport Beach vs World: Temperature Compared
Newport Beach's average annual maximum temperature is 22°C (72°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
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.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Newport Beach this rarely lasts long on the ground.
For more on Newport Beach's weather — including monthly rainfall, sunshine hours, and humidity — visit our Newport Beach climate page.
