Weather (noun)

1. The state of the atmosphere at a particular place and time as regards heat, dryness, sunshine, wind, rain, etc.
2. The general or average atmospheric conditions of a region over a long period of time.
3. A spell of particular atmospheric conditions, especially as affecting health or comfort.

Origin:

Old english weder, of germanic origin; related to dutch weer and german wetter.

Examples:

1. The weather was warm and sunny today.
2. We're due for some good weather next week.
3. The weather was so bad we had to cancel the picnic.
4. The weather has a big impact on agriculture.
5. I don't like this weather, it's too hot.