Derby Precipitation: Average Monthly Rainfall and Snowfall

This graph shows the average amount of rainfall per month in Derby (Western Australia). The numbers are calculated over a 30-year period to provide a reliable average.

• A lot of rain (rainy season) falls in the months: January, February and December.
• Derby has dry periods in May, June, July, August, September, October and November.
• On average, January is the wettest month with 215 mm of precipitation.
• On average, September is the driest month with 0 mm of precipitation.
• The average amount of annual precipitation is 729 mm.