"Erratic rainfall" refers to irregular or unpredictable patterns of rainfall. It means that instead of following a consistent and regular pattern, the amount and timing of rainfall varies unexpectedly. Full definition
The rise in temperature will be accompanied by erratic rainfall and increasing drought, the likes of which have already been seen in the country, according to the report. (scientificamerican.com)
This report presents new data on how increasingly erratic rainfall impacts farms, firms and families, as climate change is making rainfall more erratic and less predictable.. (uncclearn.org)
Billions of the world's poorest people, however, will be at risk of more erratic rainfall patterns. (climatechangepredictions.org)