It had been raining on and off for most of the day.
It would rain for almost two days and three nights.
It had been raining on and off for three days.
When the winds come out of the east in the spring and early summer, it may rain for a week or more.
Chances are that it will rain for a couple hours each day.
It has rained like this every day for a month.
It rained for most of the next day, but stopped before evening.
That day it rained for the first time in weeks.
In addition, it had been raining for four days, and nearly everyone was fighting the same cold.
In Germany it also hasn't rained for a long time.