🔍
0 / 6
🌤️

Add your first city

Type a city name above and press + Add City to see live weather.

What is Weather, Exactly?

Understanding the weather is more than looking at a cloud — it's about data, physics, and global patterns. At SunorSnow, we believe understanding the "why" behind the weather helps you plan your life better.

Weather is the state of the atmosphere at a specific place and time, driven by four main ingredients:

  • Temperature: The amount of heat in the air.
  • Air Pressure: The weight of the air above us.
  • Humidity: The amount of water vapour in the air.
  • Wind: Movement of air from high-pressure to low-pressure areas.
How Do We Predict the Future?

Meteorologists use Numerical Weather Prediction (NWP). Supercomputers take data from satellites, weather balloons and ground stations and solve complex equations to see how air will move and change over the next few days.

Did you know? Short-term forecasts (1–3 days) are now accurate over 90% of the time, but because the atmosphere is a "chaotic system," 7-day forecasts are much harder to pin down.
Understanding High and Low Pressure

You've likely seen "H" and "L" on weather maps:

  • High Pressure (H): Air pressing down — gives clear, sunny skies.
  • Low Pressure (L): Air rising and cooling — brings rain, snow, or storms.
Why Track Multiple Cities?

In our globalised world, weather in one place affects another. Read the full guide →