It's raining today. Raining is a verb, describing the action of rain. It's rainy today.

Understanding the Context

Rainy is an adjective, describing what the weather is like today. Sunny and cloudy are also adjectives that describe the weather, so for parallelism, it makes sense to say "It's rainy today" if you would otherwise write "It's sunny today." WSAV-TV: Storm Team 3: Cloudy and cooler today as a cold front approaches After a tied record high yesterday, changes are on the way today. A weak cold front approaching from the west will bring increasing cloud cover, breezy conditions, and ... Storm Team 3: Cloudy and cooler today as a cold front approaches WSAV-TV: Storm Team 3: Record breaking heat today before a work week cool down Storm Team 3: Record breaking heat today before a work week cool down The phrases " on tomorrow," " on today," and " on yesterday " are commonly heard in the southern region of the United States.

Key Insights

They are acceptable in casual speech and other informal contexts, but should not be used in formal contexts such as academic writing. american english - Origins and history of "on tomorrow", "on today ...