Two Words Often Confused
The words "weather" and "climate" are used so often that people frequently treat them as the same thing. They are closely related, but they are not the same. Understanding the difference between them is one of the most useful ideas in earth science, and it comes down to a single factor: time.
What Weather Means
Weather is the state of the atmosphere at a particular place over a short period of time, such as an hour, a day, or a week. It is what is happening outside right now. Weather includes things like temperature, rain, wind, clouds, humidity, and storms. Weather can change quickly and often, sometimes from sunny to rainy within the same afternoon. When you look out the window or check a forecast for tomorrow, you are dealing with weather.
What Climate Means
Climate is the average pattern of weather in a place, measured over a long period of time, typically about thirty years or more. Instead of asking what the sky is doing today, climate asks what the weather is usually like in a place across the seasons and years. For example, saying a desert is hot and dry, or that a certain region has snowy winters, is a description of climate, not the weather on any single day.
A Helpful Way to Remember
There is a simple saying that captures the difference well: "Climate is what you expect; weather is what you get." Climate tells you what conditions are normal and likely for a place, so you know to expect snow in a cold region's winter. Weather tells you what is actually happening on a given day, which might be an unusually warm or stormy day. One is the long-term pattern, the other is the short-term reality.
Source
This article was written using information from Wikipedia.