When talking about the weather in San Francisco, first-time visitors almost always have the same reaction.

"Why is it so cold in the summer?" This is the essence of this city.

If you think California is all warm, you'll be taken aback.

This city is much more unpredictable than you might expect, and that's what makes it even more charming.

It's basically a Mediterranean climate, but the strong influence of the ocean means the temperature doesn't change much throughout the year.

It's even funnier when you look at the numbers. The temperature difference between January and July is almost nonexistent.

Winter isn't as cold as you might think, and summer isn't as hot as you expect. Instead, it's always a bit cool.

In winter, January and February, it rains a bit more often. Still, the temperature is around the upper 50s, so it's much better than a winter in Korea.

A light jacket is sufficient. From March, you start to feel spring, but it's more like "less chilly" than actually warm.

By April and May, the weather is at its most pleasant for living. This is why visitors are often very satisfied during this time.

The problem is summer. Generally, summer is from June to August, but San Francisco goes completely in the opposite direction.

Fog covers the city. Especially along the coast, there are more days with fog than sunshine.

Even during the day, it can be cold if the wind blows, and by evening, it feels almost like fall. Many people regret only wearing short sleeves.

In fact, September and October are the best. This is when the phrase "San Francisco has great weather" truly applies.

The temperature is stable, the sky is clear, and it's the most comfortable time for sightseeing.

That's why many locals consider this period to be the real summer.

From November, the temperature starts to drop again, and by December, the rain increases once more.

However, it's not extremely cold. It's just chilly, a bit cloudy, and you just need to bring an umbrella.

The key to this city's weather can be summed up in one phrase: "You can feel all four seasons in a single day."

It's chilly in the morning, warms up a bit during the day, and gets cold again if the wind blows.

So if you only wear one layer, you will definitely regret it. Layering is essential.

Travel tips are simple. Don't just pack short sleeves if you're going in the summer; make sure to bring a light jacket.

If you're going to see the Golden Gate Bridge, the morning is better. In the afternoon, fog can obscure everything.

Also, this city is much easier to navigate by public transport or on foot than by car. The streets are complicated, and parking isn't easy.

Ultimately, San Francisco is a city that flows "differently than expected," including its weather.

That's what makes it memorable. Clear days are nice, but the foggy Golden Gate Bridge has a different atmosphere.

I think the charm of this city lies not in perfect weather, but in the feelings created amidst its unpredictable weather.