Del Mar (CA) Temperature by Month
Del Mar, California, United States of America has a consistently pleasant climate year-round, with daytime highs averaging 21°C (70°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Del Mar Monthly Temperatures
The temperature in Del Mar remains steady throughout the year, providing a consistently comfortable climate. Maximum daytime temperatures range from a comfortable 24°C (75°F) in September to a pleasant 18°C (64°F) in December. Nights are mild year-round, with lows ranging from 18°C (64°F) in September to 8°C (46°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Del Mar by month:
The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. September, the city's warmest month, gets 253 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Del Mar 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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Del Mar vs World: Temperature Compared
Del Mar'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:
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.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
What Does the Temperature Feel Like in Del Mar?
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 Del Mar, December is the coolest month, with average highs of 18°C (64°F) and humidity around 64% — considered high. In September, the warmest month, temperatures average 24°C (75°F) with 74% 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 Del Mar this rarely lasts long on the ground.
For more on Del Mar's weather — including monthly rainfall, sunshine hours, and humidity — visit our Del Mar climate page.
