This is an irregular verb. It follows the conjugation pattern of the verb llover.
PresentPresente
Yo suelo tomar café con leche por la mañana.
I usually have coffee with milk in the morning.
ImperfectPretérito imperfecto
De niños, solíamos jugar en la calle.
As children, we used to play in the street.
Present SubjunctivePresente de subjuntivo
Aunque suela llover aquí, hoy hace sol.
Even though it usually rains here, it is sunny today.