Los Alamitos (CA) Temperature by Month
The average annual maximum temperature in Los Alamitos, California, United States of America is 23°C (73°F), with daytime highs ranging from 19°C (66°F) in December to 28°C (82°F) in September. This page covers monthly averages, day-night differences, and how Los Alamitos compares to cities worldwide.
Los Alamitos Monthly Temperatures
Los Alamitos sees moderate fluctuations in temperatures, making each season distinct yet not extreme. Nights are considerably cooler, 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 Los Alamitos by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. September, the warmest month of the year, receives 278 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Los Alamitos 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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Los Alamitos vs World: Temperature Compared
Los Alamitos's average annual maximum temperature is 23°C (73°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.
Chicago, USA averages 15°C (59°F) annually — known for extreme seasonal swings, from bitterly cold winters to warm summers.
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 Los Alamitos?
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 Los Alamitos, December is the coolest month, with average highs of 19°C (66°F) and humidity around 52% — considered moderate. In September, the warmest month, temperatures average 28°C (82°F) with 67% 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.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Los Alamitos's weather — including monthly rainfall, sunshine hours, and humidity — visit our Los Alamitos climate page.
