La Jolla Hermosa Temperature by Month

La Jolla Hermosa in United States of America enjoys a stable climate, with daytime temperatures staying close to 22°C (72°F) throughout the year. Explore the full monthly breakdown below.

In La Jolla Hermosa temperatures are generally consistent throughout the year. Maximum daytime temperatures range from a pleasant 18°C (64°F) in December to a comfortable 25°C (77°F) in September. Nighttime lows range 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 La Jolla Hermosa by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. September, the warmest month, sees 253 hours of sunshine.

The chart below shows the average temperature throughout the year:

La Jolla Hermosa'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:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

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 La Jolla Hermosa, 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 25°C (77°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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on La Jolla Hermosa's weather, including monthly rainfall, sunshine hours, and humidity, visit our La Jolla Hermosa climate page.