...The answer isn't as simple as it seems.

The first important thing: we need to distinguish between weather and climate. Weather is what's happening right now outside. Today it's cool, tomorrow it's hot, and next week it'll rain. Climate, however, is an average over decades. And if we look at climate specifically, rather than individual seasons, the Earth as a whole continues to warm.

So why might summers be "not hot"? There are several reasons.

First, there are natural fluctuations, such as El Niño and La Niña. They influence the distribution of temperatures across the planet and can make some regions hotter and others cooler. It's like a seesaw: some regions experience an increase, while others experience a decrease.

Secondly, there are atmospheric processes. Sometimes, colder air masses linger over Europe longer, leading to more frequent rainfall, and ultimately, summers feel milder. This doesn't mean the warming has disappeared - it's just that at that moment, our region found itself on the "cool side."

There's another important point: global warming isn't about constant heat every day. It's about instability. The climate is becoming more "nervous": in some places, there are extreme heat waves, in others, heavy downpours, and in others, the opposite—unexpectedly cool periods.

According to the Intergovernmental Panel on Climate Change, recent decades remain the warmest on record. This means the global trend hasn't gone away, even if individual summers feel more comfortable.

To summarize, the situation looks like this:
globally, warming continues;
locally, periods of cooling or simply "normal" summers are possible.

And perhaps those "not-so-hot" summers aren't the end of the problem, but simply a temporary respite.