People often say that the Mediterranean climate is the most suitable climate in the world for human habitation.
Winters are not too cold, summers are sunny, and rainfall is not as frequent as in tropical regions. Indeed, some of the world’s most famous ancient civilizations were born around the Mediterranean Sea.
So, there is certainly some truth to this statement.
But I’ve been living in Spain for almost four years now and have experienced several full cycles of spring, summer, autumn, and winter here. I’m increasingly feeling that the so-called “best climate for human survival” might only be half right.
The Mediterranean climate may have been very suitable for the development of early human civilizations, but it may not be the most comfortable climate for modern people to live in.
Why Was the Mediterranean Climate Suitable for Early Civilizations?
In the early stages of human civilization, the stability and regularity of a region’s climate were extremely important.
The Mediterranean region has distinct seasonal changes. People could gradually grasp the patterns by observing year after year when the weather would warm up, when to plant seeds, when the dry summer would begin, and when to harvest.
What agriculture needs most, in fact, is regularity.
When the climate is regular, people know when to plant, when to harvest, when to store grain, and when to prepare for winter. Only after agriculture stabilized could humans settle down for the long term, forming villages, cities, trade, writing, and nations.
From this perspective, the Mediterranean climate was indeed conducive to the development of early agricultural civilizations.
It had another advantage: it was relatively dry.
In ancient times, when medical conditions were poor, hot and humid environments were more likely to breed mosquitoes and parasites, and also increased the risk of spreading certain infectious diseases. Back then, there were no window screens, insecticides, air conditioning, or proper drainage systems, let alone modern medicine.
For ancient people, living in a relatively dry region with distinct seasons and a regular climate was indeed easier for survival and for developing a stable civilization.
So I think the statement “the Mediterranean climate is the best for human survival” makes a lot of sense when placed in the context of early human civilization’s development.
But, Times Have Changed
Humans today no longer live entirely at the mercy of the natural climate.
The mosquitoes, parasites, snakes, and infectious diseases that once made tropical regions fearsome can now be controlled through modern medicine, public health, urban drainage, environmental management, window screens, and insecticides.
Land that was once difficult to cultivate can now be transformed through machinery, irrigation, and modern agricultural technology.
More importantly, modern humans have air conditioning.
Air conditioning has largely changed humanity’s tolerance for climate. Previously, if a place was too hot, people might not have been able to work or live there for long periods; now, as long as you’re indoors, the temperature can be controlled within a relatively comfortable range.
This means that tropical regions, once considered unsuitable for human habitation, can become quite comfortable under modern technological conditions. Conversely, some of the past advantages of the Mediterranean climate may not be absolute advantages today.
Valencia’s Summers Feel Drier Than You’d Think
I currently live in Valencia, which is in a typical Mediterranean climate zone.
When many people think of the Mediterranean climate, they picture sunshine, sea breezes, blue skies, and beaches, imagining it’s comfortable year-round.
But after living here for almost four years, I’ve found that the actual feel is not always so mild. At least for me, the air here often feels dry, especially in the summer after turning on the air conditioning.
Sometimes the temperature difference between morning and evening is significant, and the perceived temperature difference between sunny and shady spots is also very noticeable. Standing in the sun, your skin might feel like it’s burning; step into the shade, and you’ll immediately feel cooler.
Sometimes you need an extra layer in the morning, find it unbearably hot at noon, and then it gets cool again in the evening. It’s like experiencing several seasons in a single day.
For me, this kind of temperature fluctuation isn’t necessarily more comfortable than a relatively stable tropical climate.
A more obvious problem is using the air conditioner.
When an air conditioner cools, it causes moisture in the air to condense and be drained outside. In other words, while cooling, an AC unit also typically dehumidifies.
If you’re in a humid environment to begin with, this dehumidifying effect is a good thing. But when the indoor air already feels dry, continuing to run the AC can worsen discomfort in the nose, throat, and skin. The nasal passages, in particular, can become dry, painful, and even prone to nosebleeds when the air is too dry.
So, a contradictory situation sometimes arises here in the summer:
If you don’t turn on the AC, it’s hot; if you do, it feels too dry.
Although the temperature drops, your body doesn’t necessarily feel truly comfortable.
Are Tropical Regions Actually More Suitable for Modern People?
I used to think that tropical regions were too hot and humid, and definitely inferior to the Mediterranean climate.
But thinking about it now, in a place like Sanya in Hainan, although the outdoor temperature and humidity are high, the indoor environment can actually achieve a comfortable balance of temperature and humidity after turning on the air conditioner.
Outdoor humidity in tropical regions can be very high. When the AC is on, it cools and dehumidifies simultaneously. With the right equipment, a well-sealed room, and proper settings, the indoor humidity can be brought down to a more comfortable range.
In contrast, in an environment that already feels dry, the further drop in humidity from running the AC can make you even more uncomfortable.
Another characteristic of tropical regions is the generally small temperature range. The temperature fluctuations between day and night, and throughout the year, are not as drastic. You don’t need to prepare many different types of clothing, nor will you find yourself wearing a jacket in the morning, changing into a short-sleeved shirt at noon, and putting the jacket back on in the evening.
From a purely physical perspective, this stability can sometimes be more comfortable.
Of course, tropical regions have their own problems:
- Muggy and humid outdoors;
- More mosquitoes and insects;
- Food spoils more easily;
- Greater reliance on cooling, electricity, and moisture-proofing in buildings.
But many of these problems can now be mitigated by air conditioning, refrigerators, window screens, insecticides, modern medicine, and urban infrastructure. The original disadvantages of a tropical climate are no longer as insurmountable as they were in ancient times.
The “Best” Climate Actually Depends on the Era
So now I feel that whether the Mediterranean climate is the best for human survival cannot be discussed outside the context of the times.
For ancient people, the Mediterranean climate was likely ideal. It had relatively regular seasons, climatic conditions suitable for agriculture, and a drier environment, which reduced some of the risks from diseases and natural conditions.
It was probably very suitable for the birth and development of early human civilizations.
But for modern people, the situation has changed.
We have air conditioning, modern medicine, and urban infrastructure, and we have the ability to actively change our living environment. Some of the past disadvantages of tropical regions can be partially offset by modern technology, while the dry feel, temperature fluctuations, and intense sunlight of the Mediterranean climate may not be comfortable for everyone.
At least based on my own experience of living in Spain for almost four years, I no longer believe that the Mediterranean climate is inherently the best climate in the world for human habitation.
It might have been the best for the growth of ancient civilizations, but not necessarily the best for people living today.
There has probably never been a single, fixed answer to what constitutes the “best” climate.
Ancient people needed a climate suitable for planting, harvesting, and reducing disease. What modern people need, perhaps, is just a room that, with the air conditioning on, is neither cold nor hot, neither humid nor excessively dry.