Is infrared radiation able to reach us from sun?

Yes, even though some of it doesn't reach the surface of Earth because of the atmosphere.

Infrared radiation from the Sun is the warmth you feel on your face when you stand

outside on a clear, sunny day. It's what warms the air before you breathe, it's what

melts the ice and snow in the Spring, and it's the source of the heat of the oceans.