Site to check actual past weather for trip planning, not just averages

Planning a holiday I would always google something like "weather in Barcelona in May" and every site would just show monthly averages. But I found monthly averages weren't great for getting an idea of what the weather will actually be like. So I built Wengo Travel, a free site where you can see past weather, day by day, hour by hour, for destinations around the world. It's kind of like a weather forecast app, but for past weather. Would love any feedback.