Talking about the weather

When we talk about the weather, we often use "it."

For example:
"It was raining when we left, but now it's sunny."
"It's too windy to go for a walk, so let's stay home and watch a video."

This is the most colloquial way to say how the weather is. To talk about the present moment using a verb, we say "it's raining." To talk about general conditions, we can use the simple present, "it rains a lot in Indonesia." When we make a prediction, we can say, "I think it's going to rain" or "they say it's going to rain tomorrow."

Here's a link to more vocabulary for speaking about the weather: http://www.englishclub.com/speaking/weather.htm.

P.S. The image here is a painting titled "Extreme Weather Warning" by Jim Bergerman and John Avignon, available at www.factoryfresh.net