Learn Japanese: tenki ga yokattara, sanpo ni ikimasu. tenki ga ii to, sanpo ni ikimasu. - If the weather is good, I'll go for a walk.

You cannot use と here, as the consequence is neither habitual nor uncontrollable.

You cannot use と here, as the consequence is neither habitual nor uncontrollable.

Breakdown of tenki ga yokattara, sanpo ni ikimasu. tenki ga ii to, sanpo ni ikimasu.