Newark (CA) Temperature by Month
The average annual maximum temperature in Newark, California, United States of America is 21°C (70°F), with daytime highs ranging from 15°C (59°F) in December to 26°C (79°F) in September. This page covers monthly averages, day-night differences, and how Newark compares to cities worldwide.
Newark Monthly Temperatures
With significant temperature fluctuations, Newark enjoys distinct seasons year-round. Nighttime lows range from 14°C (57°F) in September to 6°C (43°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Newark by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. September, the warmest month, gets 270 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Newark 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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Newark vs World: Temperature Compared
Newark's average annual maximum temperature is 21°C (70°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.
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.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in Newark?
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 Newark, December is the coolest month, with average highs of 15°C (59°F) and humidity around 78% — considered high. In September, the warmest month, temperatures average 26°C (79°F) with 73% 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.
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 Newark this rarely lasts long on the ground.
For more on Newark's weather — including monthly rainfall, sunshine hours, and humidity — visit our Newark climate page.
