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What Is Weather

HomeWeatherWhat Is Weather

Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Edition Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.

Weather is the day-to-day state of the atmosphere over a given place — sunshine, clouds, rain, snow, wind, and temperature. Across Canada, the weather is shaped by the Pacific Ocean, the Rocky Mountains, the Prairies, the Great Lakes, and the Atlantic, often changing drastically from one region to the next.

What is weather in science?

In scientific terms, weather refers to the short-term condition of the lower atmosphere at a specific time and place. Meteorologists measure temperature, humidity, air pressure, wind speed and direction, and precipitation. These variables combine to create the weather we experience from minute to minute and day to day. The live forecast above shows current conditions for your location — a snapshot of the atmosphere right now.

What is weather vs climate?

Weather is what you get today; climate is what you expect over decades. While the live forecast above tells you what is weather today, climate data tracks long-term averages and extremes. For example, Vancouver’s rainy winters are part of its climate, but a single sunny afternoon is weather. Understanding the difference helps Canadians prepare for both the immediate forecast and broader environmental trends — what is weather geography and what is climate are often taught together in schools.

DefinitionAtmospheric conditions at a specific time and place
Key elementsTemperature, precipitation, wind, humidity, pressure
Canadian contextRapidly varying weather due to diverse geography and multiple coastlines
Forecast horizonTypically 1–14 days; accuracy drops beyond a week
What is weather short answer?

Weather is the present condition of the air around you — how hot or cold, wet or dry, calm or windy it is. It changes hour by hour and is different from climate, which describes long‑term patterns.

What is weather for kids?

Think of weather as what’s happening outside right now: the sun, rain, snow, or wind. Meteorologists use thermometers, rain gauges, and satellites to measure it and tell us what the day will be like.

What is weather climate?

Weather is the daily variation; climate is the average of weather over 30 years or more. A snowy day in Calgary is weather, but the fact that Calgary gets cold winters is part of its climate.

For current conditions across the country, visit the Canada weather hub. If severe storms or warnings are in your area, check the Weather Warning page for the latest updates.

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